Bug 1434953 - Part 1: Update test262 - Feb 02 2018 edition. rs=sfink

--HG--
extra : rebase_source : f92bad42fb9dc3b7eca98f0b6859b1328ff9a924

js/src/tests/test262/GIT-INFO

@@ -1,5 +1,5 @@
-commit 73120a5492ce274d551d2a215e65ba30085be7ef
+commit 82c6148980332febe92a544a1fb653718e9fdb57
-Author: Rick Waldron <waldron.rick@gmail.com>
+Author: André Bargull <andre.bargull@gmail.com>
-Date:   Wed Jan 10 17:33:03 2018 -0500
+Date:   Thu Feb 1 11:04:51 2018 -0800
 
-    Fix: various lint fixes
+    Add missing closing parenthesis and remove invalid async flag (#1402)

js/src/tests/test262/annexB/built-ins/String/prototype/trimLeft/length.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimLeft
+description: >
+  String.prototype.trimLeft.length is 0.
+info: >
+  String.prototype.trimLeft ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this
+    value is equal to the largest number of named arguments shown in the
+    subclause headings for the function description, including optional
+    parameters. However, rest parameters shown using the form “...name”
+    are not included in the default argument count.
+
+    Unless otherwise specified, the length property of a built-in Function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [string-trimming]
+---*/
+
+verifyProperty(String.prototype.trimLeft, "length", {
+  value: 0,
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/annexB/built-ins/String/prototype/trimLeft/name.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimLeft
+description: >
+  String.prototype.trimLeft.name is "trimStart".
+info: >
+  String.prototype.trimLeft ( )
+
+  The function object that is the initial value of  String.prototype.trimLeft is the same function object that is the initial value of  String.prototype.trimStart.
+
+includes: [propertyHelper.js]
+features: [string-trimming,String.prototype.trimStart]
+---*/
+
+verifyProperty(String.prototype.trimLeft, "name", {
+  value: "trimStart",
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/annexB/built-ins/String/prototype/trimLeft/prop-desc.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2017 The Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimLeft
+description: >
+  "trimLeft" property of String.prototype
+info: >
+  17 ECMAScript Standard Built-in Objects:
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+  [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [string-trimming]
+---*/
+
+verifyProperty(String.prototype, "trimLeft", {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/annexB/built-ins/String/prototype/trimLeft/reference-trimStart.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimLeft
+description: >
+  String.prototype.trimLeft is a reference to String.prototype.trimStart.
+info: >
+  String.prototype.trimLeft ( )
+
+  The function object that is the initial value of String.prototype.trimLeft
+  is the same function object that is the initial value of
+  String.prototype.trimStart.
+features: [string-trimming]
+---*/
+
+assert.sameValue(String.prototype.trimLeft, String.prototype.trimStart);
+
+reportCompare(0, 0);

js/src/tests/test262/annexB/built-ins/String/prototype/trimRight/length.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimRight
+description: >
+  String.prototype.trimRight.length is 0.
+info: >
+  String.prototype.trimRight ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this
+    value is equal to the largest number of named arguments shown in the
+    subclause headings for the function description, including optional
+    parameters. However, rest parameters shown using the form “...name”
+    are not included in the default argument count.
+
+    Unless otherwise specified, the length property of a built-in Function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [string-trimming]
+---*/
+
+verifyProperty(String.prototype.trimRight, "length", {
+  value: 0,
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/annexB/built-ins/String/prototype/trimRight/name.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimRight
+description: >
+  String.prototype.trimRight.name is "trimEnd".
+info: >
+  String.prototype.trimRight ( )#
+
+  The function object that is the initial value of  String.prototype.trimRight is the same function object that is the initial value of  String.prototype.trimEnd.
+includes: [propertyHelper.js]
+features: [string-trimming,String.prototype.trimEnd]
+---*/
+
+verifyProperty(String.prototype.trimRight, "name", {
+  value: "trimEnd",
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/annexB/built-ins/String/prototype/trimRight/prop-desc.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2017 The Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimRight
+description: >
+  "trimRight" property of String.prototype
+info: >
+  17 ECMAScript Standard Built-in Objects:
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+  [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [string-trimming]
+---*/
+
+verifyProperty(String.prototype, "trimRight", {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/annexB/built-ins/String/prototype/trimRight/reference-trimEnd.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimRight
+description: >
+  String.prototype.trimRight is a reference to String.prototype.trimEnd.
+info: >
+  String.prototype.trimRight ( )
+
+  The function object that is the initial value of String.prototype.trimRight
+  is the same function object that is the initial value of
+  String.prototype.trimEnd.
+features: [string-trimming]
+---*/
+
+assert.sameValue(String.prototype.trimRight, String.prototype.trimEnd);
+
+reportCompare(0, 0);

js/src/tests/test262/annexB/language/comments/multi-line-html-close.js

@@ -3,7 +3,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 esid: sec-html-like-comments
-esid: sec-html-like-comments
 description: Optional HTMLCloseComment following MultiLineComment
 info: |
     Comment ::

js/src/tests/test262/annexB/language/comments/single-line-html-close-asi.js

@@ -3,7 +3,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 esid: sec-html-like-comments
-esid: sec-html-like-comments
 description: >
     A SingleLineHTMLCloseComment is considered to be a LineTerminator for
     purposes of parsing by the syntactic grammar.

js/src/tests/test262/annexB/language/comments/single-line-html-close.js

@@ -3,7 +3,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 esid: sec-html-like-comments
-esid: sec-html-like-comments
 description: SingleLineHTMLCloseComment
 info: |
     Comment ::

js/src/tests/test262/annexB/language/comments/single-line-html-open.js

@@ -3,7 +3,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 esid: sec-html-like-comments
-esid: sec-html-like-comments
 description: SingleLineHTMLOpenComment
 info: |
     Comment ::

js/src/tests/test262/annexB/language/expressions/object/__proto__-fn-name.js

@@ -15,7 +15,6 @@ info: |
        a. Let hasNameProperty be HasOwnProperty(propValue, "name").
        b. ReturnIfAbrupt(hasNameProperty).
        c. If hasNameProperty is false, perform SetFunctionName(propValue, propKey).
-includes: [propertyHelper.js]
 ---*/
 
 var o;

js/src/tests/test262/annexB/language/literals/numeric/legacy-octal-integer.js

@@ -2,7 +2,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 esid: sec-additional-syntax-numeric-literals
-esid: sec-additional-syntax-numeric-literals
 description: Mathematical value for LegacyOctalIntegerLiteral
 info: |
     NumericLiteral ::

js/src/tests/test262/annexB/language/literals/numeric/non-octal-decimal-integer.js

@@ -2,7 +2,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 esid: sec-additional-syntax-numeric-literals
-esid: sec-additional-syntax-numeric-literals
 description: Mathematical value for NonOctalDecimalIntegerLiteral
 info: |
      DecimalIntegerLiteral ::

js/src/tests/test262/built-ins/Array/prototype/flatMap/depth-always-one.js

@@ -12,8 +12,12 @@ assert.compareArray([1, 2].flatMap(function(e) {
   return [e, e * 2];
 }), [1, 2, 2, 4], 'array depth is 1');
 
-assert.compareArray([1, 2, 3].flatMap(function(ele) {
+var result = [1, 2, 3].flatMap(function(ele) {
   return [[ele * 2]];
-}), [[2], [4], [6]], 'array depth is more than 1');
+});
+assert.sameValue(result.length, 3, 'array depth is more than 1 - length');
+assert.compareArray(result[0], [2], 'array depth is more than 1 - 1st element');
+assert.compareArray(result[1], [4], 'array depth is more than 1 - 2nd element');
+assert.compareArray(result[2], [6], 'array depth is more than 1 - 3rd element');
 
 reportCompare(0, 0);

js/src/tests/test262/built-ins/ArrayBuffer/isView/prop-desc.js

@@ -9,7 +9,7 @@ info: |
   ES6 section 17: Every other data property described in clauses 18 through 26
   and in Annex B.2 has the attributes { [[Writable]]: true,
   [[Enumerable]]: false, [[Configurable]]: true } unless otherwise specified.
-includes: [propertyHelper.js, testTypedArray.js]
+includes: [propertyHelper.js]
 ---*/
 
 verifyNotEnumerable(ArrayBuffer, "isView");

js/src/tests/test262/built-ins/ArrayBuffer/prototype/byteLength/this-is-sharedarraybuffer.js

@@ -1,9 +1,11 @@
+// |reftest| skip-if(!this.hasOwnProperty('SharedArrayBuffer')) -- SharedArrayBuffer is not enabled unconditionally
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 
 /*---
 esid: sec-get-arraybuffer.prototype.bytelength
 description: Throws a TypeError exception when `this` is a SharedArrayBuffer
+features: [SharedArrayBuffer]
 ---*/
 
 var getter = Object.getOwnPropertyDescriptor(

js/src/tests/test262/built-ins/ArrayBuffer/prototype/slice/this-is-sharedarraybuffer.js

@@ -1,3 +1,4 @@
+// |reftest| skip-if(!this.hasOwnProperty('SharedArrayBuffer')) -- SharedArrayBuffer is not enabled unconditionally
 // Copyright (C) 2017 Mozilla Corporation. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 
@@ -5,6 +6,7 @@
 esid: sec-arraybuffer.prototype.slice
 description: >
   Throws a TypeError if `this` is a SharedArrayBuffer
+features: [SharedArrayBuffer]
 ---*/
 
 assert.throws(TypeError, function() {

js/src/tests/test262/built-ins/Atomics/add/bad-range.js

@@ -10,9 +10,14 @@ includes: [testAtomics.js, testTypedArray.js]
 features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, TypedArray, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
 var views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+  views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     let view = new View(sab);
     testWithAtomicsOutOfBoundsIndices(function(IdxGen) {

js/src/tests/test262/built-ins/Atomics/add/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/and/bad-range.js

@@ -10,9 +10,14 @@ includes: [testAtomics.js, testTypedArray.js]
 features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, TypedArray, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
 var views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+  views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     let view = new View(sab);
     testWithAtomicsOutOfBoundsIndices(function(IdxGen) {

js/src/tests/test262/built-ins/Atomics/and/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/compareExchange/bad-range.js

@@ -10,9 +10,14 @@ includes: [testAtomics.js, testTypedArray.js]
 features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, TypedArray, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
 var views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+  views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     let view = new View(sab);
     testWithAtomicsOutOfBoundsIndices(function(IdxGen) {

js/src/tests/test262/built-ins/Atomics/compareExchange/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/exchange/bad-range.js

@@ -10,9 +10,14 @@ includes: [testAtomics.js, testTypedArray.js]
 features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, TypedArray, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
 var views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+  views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     let view = new View(sab);
     testWithAtomicsOutOfBoundsIndices(function(IdxGen) {

js/src/tests/test262/built-ins/Atomics/exchange/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/load/bad-range.js

@@ -10,9 +10,14 @@ includes: [testAtomics.js, testTypedArray.js]
 features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, TypedArray, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
 var views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+  views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     let view = new View(sab);
     testWithAtomicsOutOfBoundsIndices(function(IdxGen) {

js/src/tests/test262/built-ins/Atomics/load/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/or/bad-range.js

@@ -10,9 +10,14 @@ includes: [testAtomics.js, testTypedArray.js]
 features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, TypedArray, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
 var views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+  views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     let view = new View(sab);
     testWithAtomicsOutOfBoundsIndices(function(IdxGen) {

js/src/tests/test262/built-ins/Atomics/or/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/store/bad-range.js

@@ -10,9 +10,14 @@ includes: [testAtomics.js, testTypedArray.js]
 features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, TypedArray, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
 var views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+  views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     let view = new View(sab);
     testWithAtomicsOutOfBoundsIndices(function(IdxGen) {

js/src/tests/test262/built-ins/Atomics/store/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/sub/bad-range.js

@@ -10,9 +10,14 @@ includes: [testAtomics.js, testTypedArray.js]
 features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, TypedArray, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
 var views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+  views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     let view = new View(sab);
     testWithAtomicsOutOfBoundsIndices(function(IdxGen) {

js/src/tests/test262/built-ins/Atomics/sub/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/wait/bad-range.js

@@ -6,16 +6,23 @@
 esid: sec-atomics.wait
 description: >
   Test range checking of Atomics.wait on arrays that allow atomic operations
-includes: [testAtomics.js]
+includes: [testAtomics.js, testTypedArray.js]
-features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, for-of]
+features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, TypedArray, arrow-function, let, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
-var view = new Int32Array(sab);
+var views = [Int32Array];
 
-testWithAtomicsOutOfBoundsIndices(function(IdxGen) {
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+}
+
+testWithTypedArrayConstructors(function(View) {
+  let view = new View(sab);
+  testWithAtomicsOutOfBoundsIndices(function(IdxGen) {
     let Idx = IdxGen(view);
     assert.throws(RangeError, () => Atomics.wait(view, Idx, 10, 0)); // Even with zero timeout
-});
+  });
+}, views);
 
 reportCompare(0, 0);

js/src/tests/test262/built-ins/Atomics/wait/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/wake/bad-range.js

@@ -6,16 +6,23 @@
 esid: sec-atomics.wake
 description: >
   Test range checking of Atomics.wake on arrays that allow atomic operations
-includes: [testAtomics.js]
+includes: [testAtomics.js, testTypedArray.js]
-features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, for-of]
+features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, TypedArray, arrow-function, let, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
-var view = new Int32Array(sab);
+var views = [Int32Array];
 
-testWithAtomicsOutOfBoundsIndices(function(IdxGen) {
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+}
+
+testWithTypedArrayConstructors(function(View) {
+  let view = new View(sab);
+  testWithAtomicsOutOfBoundsIndices(function(IdxGen) {
     let Idx = IdxGen(view);
     assert.throws(RangeError, () => Atomics.wake(view, Idx, 0)); // Even with waking zero
-});
+  });
+}, views);
 
 reportCompare(0, 0);

js/src/tests/test262/built-ins/Atomics/wake/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Atomics/xor/bad-range.js

@@ -10,9 +10,14 @@ includes: [testAtomics.js, testTypedArray.js]
 features: [SharedArrayBuffer, ArrayBuffer, DataView, Atomics, arrow-function, let, TypedArray, for-of]
 ---*/
 
-var sab = new SharedArrayBuffer(4);
+var sab = new SharedArrayBuffer(8);
 var views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  views.push(BigInt64Array);
+  views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     let view = new View(sab);
     testWithAtomicsOutOfBoundsIndices(function(IdxGen) {

js/src/tests/test262/built-ins/Atomics/xor/nonshared-int-views.js

@@ -13,6 +13,11 @@ var ab = new ArrayBuffer(16);
 
 var int_views = [Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array, Uint32Array];
 
+if (typeof BigInt !== "undefined") {
+  int_views.push(BigInt64Array);
+  int_views.push(BigUint64Array);
+}
+
 testWithTypedArrayConstructors(function(View) {
     var view = new View(ab);
 

js/src/tests/test262/built-ins/Date/UTC/non-integer-values.js

@@ -0,0 +1,31 @@
+// Copyright (C) 2018 Viktor Mukhachev. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-date.utc
+description: non-integer values are converted to integers using `ToInteger`
+info: |
+  [...]
+  Return TimeClip(MakeDate(MakeDay(yr, m, dt), MakeTime(h, min, s, milli))).
+
+  #sec-timeclip
+
+  Let clippedTime be ! ToInteger(time).
+
+  #sec-makeday
+
+  Let y be ! ToInteger(year).
+  Let m be ! ToInteger(month).
+  Let dt be ! ToInteger(date).
+
+  #sec-maketime
+
+  Let h be ! ToInteger(hour).
+  Let m be ! ToInteger(min).
+  Let s be ! ToInteger(sec).
+  Let milli be ! ToInteger(ms).
+---*/
+
+assert.sameValue(Date.UTC(1970.9, 0.9, 1.9, 0.9, 0.9, 0.9, 0.9), 0, 'positive non-integer values');
+assert.sameValue(Date.UTC(-1970.9, -0.9, -0.9, -0.9, -0.9, -0.9, -0.9), -124334438400000, 'negative non-integer values');
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/Date/shell.js

@@ -40,3 +40,6 @@ var date_1999_end = 946684799999;
 var date_2000_start = 946684800000;
 var date_2099_end = 4102444799999;
 var date_2100_start = 4102444800000;
+
+var start_of_time = -8.64e15;
+var end_of_time = 8.64e15;

js/src/tests/test262/built-ins/Map/prototype/size/this-not-object-throw.js

@@ -13,7 +13,6 @@ info: |
   exception.
   ...
 
-includes: [propertyHelper.js]
 features: [Symbol]
 ---*/
 

js/src/tests/test262/built-ins/Number/NEGATIVE_INFINITY/value.js

@@ -10,7 +10,6 @@ info: |
   Number.NEGATIVE_INFINITY
 
   The value of Number.NEGATIVE_INFINITY is -∞.
-includes: [propertyHelper.js]
 ---*/
 
 assert.sameValue(Number.NEGATIVE_INFINITY, -Infinity);

js/src/tests/test262/built-ins/Number/POSITIVE_INFINITY/value.js

@@ -10,7 +10,6 @@ info: |
   Number.POSITIVE_INFINITY
 
   The value of Number.POSITIVE_INFINITY is +∞.
-includes: [propertyHelper.js]
 ---*/
 
 assert.sameValue(Number.POSITIVE_INFINITY, Infinity);

js/src/tests/test262/built-ins/Object/is/symbol-object-is-same-value.js

@@ -1,10 +1,10 @@
 // Copyright (C) 2013 the V8 project authors. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
-es6id: 7.2.
+esid: sec-object.is
 description: >
     Object.is/SameValue: Symbol
-features: [Symbol]
+features: [Object.is,Symbol]
 ---*/
 var symA = Symbol('66');
 var symB = Symbol('66');

js/src/tests/test262/built-ins/Promise/all/S25.4.4.1_A8.2_T1.js

@@ -7,7 +7,6 @@ info: |
 es6id: S25.4.4.1_A8.1_T1
 author: Sam Mikes
 description: Promise.all() rejects when a promise in its array rejects
-includes: [promiseHelper.js]
 flags: [async]
 ---*/
 

js/src/tests/test262/built-ins/Promise/all/S25.4.4.1_A8.2_T2.js

@@ -7,7 +7,6 @@ info: |
 es6id: S25.4.4.1_A8.2_T2
 author: Sam Mikes
 description: Promise.all() rejects when second promise in array rejects
-includes: [promiseHelper.js]
 flags: [async]
 ---*/
 

js/src/tests/test262/built-ins/Promise/prototype/finally/invokes-then-with-function.js

@@ -27,6 +27,7 @@ target.then = function(a, b) {
 };
 
 var originalFinallyHandler = function () {};
+var anonName = Object(function () {}).name;
 
 var result = Promise.prototype.finally.call(target, originalFinallyHandler, 2, 3);
 
@@ -43,12 +44,17 @@ assert.sameValue(
   'Invokes `then` method with a function as the first argument'
 );
 assert.notSameValue(firstArg, originalFinallyHandler, 'Invokes `then` method with a different fulfillment handler');
+assert.sameValue(firstArg.length, 1, 'fulfillment handler has a length of 1');
+assert.sameValue(firstArg.name, anonName, 'fulfillment handler is anonymous');
+
 assert.sameValue(
   typeof secondArg,
   'function',
   'Invokes `then` method with a function as the second argument'
 );
-assert.notSameValue(secondArg, originalFinallyHandler, 'Invokes `then` method with a different fulfillment handler');
+assert.notSameValue(secondArg, originalFinallyHandler, 'Invokes `then` method with a different rejection handler');
+assert.sameValue(secondArg.length, 1, 'rejection handler has a length of 1');
+assert.sameValue(secondArg.name, anonName, 'rejection handler is anonymous');
 
 assert.sameValue(result, returnValue, 'Returns the result of the invocation of `then`');
 

js/src/tests/test262/built-ins/Promise/prototype/finally/species-constructor.js

@@ -2,7 +2,7 @@
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 author: Sathya Gunasekaran
-description: finally calls the SpeciesConstructor
+description: finally calls the SpeciesConstructor and creates the right amount of promises
 esid: sec-promise.prototype.finally
 features: [Promise.prototype.finally]
 flags: [async]
@@ -22,4 +22,4 @@ new FooPromise(r => r())
   .then(() => {
     assert.sameValue(count, 6, "6 new promises were created");
     $DONE();
-});
+  }, $ERROR);

js/src/tests/test262/built-ins/Promise/prototype/finally/subclass-reject-count.js

@@ -0,0 +1,22 @@
+// Copyright (C) 2018 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+author: Jordan Harband
+description: Promise subclass finally on rejected creates the proper number of subclassed promises
+esid: sec-promise.prototype.finally
+features: [Promise.prototype.finally]
+flags: [async]
+---*/
+
+var count = 0;
+class FooPromise extends Promise {
+  constructor(resolve, reject) {
+    count++;
+    return super(resolve, reject);
+  }
+}
+
+FooPromise.reject().finally(() => {}).then($ERROR).catch(() => {
+  assert.sameValue(7, count);
+  $DONE();
+});

js/src/tests/test262/built-ins/Promise/prototype/finally/subclass-resolve-count.js

@@ -0,0 +1,22 @@
+// Copyright (C) 2018 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+author: Jordan Harband
+description: Promise subclass finally on resolved creates the proper number of subclassed promises
+esid: sec-promise.prototype.finally
+features: [Promise.prototype.finally]
+flags: [async]
+---*/
+
+var count = 0;
+class FooPromise extends Promise {
+  constructor(resolve, reject) {
+    count++;
+    return super(resolve, reject);
+  }
+}
+
+FooPromise.resolve().finally(() => {}).then(() => {
+  assert.sameValue(6, count);
+  $DONE();
+}, $ERROR);

js/src/tests/test262/built-ins/Promise/prototype/finally/subclass-species-constructor-reject-count.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2018 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+author: Jordan Harband
+description: finally on rejected Promise calls the SpeciesConstructor
+esid: sec-promise.prototype.finally
+features: [Promise.prototype.finally]
+---*/
+
+class FooPromise extends Promise {
+  static get [Symbol.species]() { return Promise; }
+}
+
+var p = Promise.reject().finally(() => FooPromise.reject());
+
+assert.sameValue(p instanceof Promise, true);
+assert.sameValue(p instanceof FooPromise, false);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/Promise/prototype/finally/subclass-species-constructor-resolve-count.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2018 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+author: Jordan Harband
+description: finally on resolved Promise calls the SpeciesConstructor
+esid: sec-promise.prototype.finally
+features: [Promise.prototype.finally]
+---*/
+
+class FooPromise extends Promise {
+  static get [Symbol.species]() { return Promise; }
+}
+
+var p = Promise.resolve().finally(() => FooPromise.resolve());
+
+assert.sameValue(p instanceof Promise, true);
+assert.sameValue(p instanceof FooPromise, false);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/Promise/prototype/finally/this-value-non-promise.js

@@ -0,0 +1,19 @@
+// Copyright (C) 2018 Jordan Harband. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+author: Jordan Harband
+description: >
+  Promise.prototype.finally called with a non-branded Promise does not throw
+esid: sec-promise.prototype.finally
+features: [Promise.prototype.finally]
+---*/
+
+var called = false;
+var p = new Proxy(Promise.resolve(), {});
+var oldThen = Promise.prototype.then;
+Promise.prototype.then = () => { called = true; };
+Promise.prototype.finally.call(p);
+assert.sameValue(called, true);
+Promise.prototype.then = oldThen;
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/Promise/resolve/S25.Promise_resolve_foreign_thenable_1.js

@@ -7,12 +7,9 @@ info: |
 es6id: S25.4.4.5
 author: Sam Mikes
 description: Promise.resolve delegates to foreign thenable
-includes: [promiseHelper.js]
 flags: [async]
 ---*/
 
-var sequence = [];
-
 var thenable = {
     then: function(onResolve, onReject) {
         return onResolve('resolved');

js/src/tests/test262/built-ins/RegExp/named-groups/groups-object-subclass-sans.js

@@ -5,7 +5,6 @@
 /*---
 description: >
   Test the groups object on RegExp subclass results that do not have their own.
-includes: [propertyHelper.js]
 esid: sec-regexpbuiltinexec
 features: [regexp-named-groups]
 info: |
@@ -28,11 +27,11 @@ class FakeRegExp extends RegExp {
 
 const re = new FakeRegExp();
 const result = re.exec("ab");
-assert.sameValue(result.__proto__, Array.prototype);
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
 assert.sameValue(false, result.hasOwnProperty("groups"));
 
 Array.prototype.groups = { a: "b" };
-Array.prototype.groups.__proto__.b = "c";
+Object.getPrototypeOf(Array.prototype.groups).b = "c";
 assert.sameValue("b", "ab".replace(re, "$<a>"));
 assert.sameValue("c", "ab".replace(re, "$<b>"));
 Array.prototype.groups = undefined;

js/src/tests/test262/built-ins/RegExp/named-groups/groups-object-subclass.js

@@ -5,7 +5,6 @@
 /*---
 description: >
   Test the groups object on RegExp subclass results that have their own.
-includes: [propertyHelper.js]
 esid: sec-regexpbuiltinexec
 features: [regexp-named-groups]
 info: |
@@ -22,14 +21,14 @@ class FakeRegExp extends RegExp {
     const fakeResult = ["ab", "a"];
     fakeResult.index = 0;
     fakeResult.groups = { a: "b" };
-    fakeResult.groups.__proto__.b = "c";
+    Object.getPrototypeOf(fakeResult.groups).b = "c";
     return fakeResult;
   }
 };
 
 const re = new FakeRegExp();
 const result = re.exec("ab");
-assert.sameValue(result.__proto__, Array.prototype);
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
 assert(result.hasOwnProperty("groups"));
 assert.sameValue("b", result.groups.a);
 assert.sameValue("b", "ab".replace(re, "$<a>"));

js/src/tests/test262/built-ins/RegExp/named-groups/groups-object-undefined.js

@@ -18,7 +18,7 @@ info: |
 
 const re = /./;
 const result = re.exec("a");
-assert.sameValue(result.__proto__, Array.prototype);
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
 assert(result.hasOwnProperty("groups"));
 assert.sameValue("a", result[0]);
 assert.sameValue(0, result.index);

js/src/tests/test262/built-ins/RegExp/named-groups/groups-object-unmatched.js

@@ -5,7 +5,6 @@
 /*---
 description: >
   Test the groups object with matched and unmatched named captures.
-includes: [propertyHelper.js]
 esid: sec-regexpbuiltinexec
 features: [regexp-named-groups]
 info: |
@@ -19,7 +18,7 @@ info: |
 
 const re = /(?<a>a).|(?<x>x)/;
 const result = re.exec("ab");
-assert.sameValue(result.__proto__, Array.prototype);
+assert.sameValue(Object.getPrototypeOf(result), Array.prototype);
 assert(result.hasOwnProperty("groups"));
 assert.sameValue("ab", result[0]);
 assert.sameValue("a", result[1]);

js/src/tests/test262/built-ins/String/prototype/trimEnd/length.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  String.prototype.trimEnd.length is 0.
+info: >
+  String.prototype.trimEnd ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this
+    value is equal to the largest number of named arguments shown in the
+    subclause headings for the function description, including optional
+    parameters. However, rest parameters shown using the form “...name”
+    are not included in the default argument count.
+
+    Unless otherwise specified, the length property of a built-in Function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [string-trimming, String.prototype.trimEnd]
+---*/
+
+verifyProperty(String.prototype.trimEnd, "length", {
+  value: 0,
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/name.js

@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  String.prototype.trimEnd.name is "trimEnd".
+info: >
+  String.prototype.trimEnd ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [string-trimming, String.prototype.trimEnd]
+---*/
+
+verifyProperty(String.prototype.trimEnd, "name", {
+  value: "trimEnd",
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/prop-desc.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2017 The Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  "trimEnd" property of String.prototype
+info: >
+  17 ECMAScript Standard Built-in Objects:
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+  [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [string-trimming, String.prototype.trimEnd]
+---*/
+
+verifyProperty(String.prototype, "trimEnd", {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-boolean.js

@@ -0,0 +1,33 @@
+// Copyright (c) 2017 Valerie Young.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: Behavior when "this" value is a boolean.
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  2. Let S be ? ToString(str).
+
+  ToString ( argument )
+  Argument Type: Boolean
+  Result:
+    If argument is true, return "true".
+    If argument is false, return "false".
+features: [string-trimming, String.prototype.trimEnd]
+---*/
+
+var trimEnd = String.prototype.trimEnd
+
+assert.sameValue(
+  trimEnd.call(true),
+  'true',
+  'String.prototype.trimEnd.call(true)'
+);
+
+assert.sameValue(
+  String.prototype.trimEnd.call(false),
+  'false',
+  'String.prototype.trimEnd.call(false)'
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-line-terminator.js

@@ -0,0 +1,32 @@
+// Copyright (c) 2017 Valerie Young.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: TrimEnd removes all line terminators from the end of a string.
+info: |
+  Runtime Symantics: TrimString ( string, where )
+  ...
+  4. Else if where is "end", let T be a String value that is a copy of S with
+     trailing white space removed.
+  ...
+
+  The definition of white space is the union of WhiteSpace and LineTerminator.
+
+features: [string-trimming, String.prototype.trimEnd]
+---*/
+
+var trimEnd = String.prototype.trimEnd;
+
+// A string of all valid LineTerminator Unicode code points
+var lt = '\u000A\u000D\u2028\u2029';
+
+var str = lt + 'a' + lt + 'b' + lt;
+var expected = lt + 'a' + lt + 'b';
+
+assert.sameValue(
+  trimEnd.call(str),
+  expected,
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-not-obj-coercible.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: The "this" value must be object-coercible
+info: |
+  1. Let O be ? RequireObjectCoercible(this value).
+features: [string-trimming, String.prototype.trimEnd]
+---*/
+
+var trimEnd = String.prototype.trimEnd;
+
+assert.sameValue(typeof trimEnd, 'function');
+
+assert.throws(TypeError, function() {
+  trimEnd.call(undefined);
+}, 'undefined');
+
+assert.throws(TypeError, function() {
+  trimEnd.call(null);
+}, 'null');
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-number.js

@@ -0,0 +1,50 @@
+// Copyright (c) 2017 Valerie Young.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: Behavoir when "this" value is a number.
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  2. Let S be ? ToString(str).
+
+  ToString ( argument )
+  Argument Type: Number
+  Result: NumberToString(argument)
+features: [string-trimming, String.prototype.trimEnd]
+---*/
+
+var trimEnd = String.prototype.trimEnd
+
+assert.sameValue(
+  trimEnd.call(NaN),
+  'NaN',
+  'String.prototype.trimEnd.call(NaN)'
+);
+
+assert.sameValue(
+  trimEnd.call(Infinity),
+  'Infinity',
+  'String.prototype.trimEnd.call(Infinity)'
+);
+
+assert.sameValue(
+  trimEnd.call(-0),
+  '0',
+  'String.prototype.trimEnd.call(-0)'
+);
+
+assert.sameValue(
+  trimEnd.call(1),
+  '1',
+  'String.prototype.trimEnd.call(1)'
+);
+
+assert.sameValue(
+  trimEnd.call(-1),
+  '-1',
+  'String.prototype.trimEnd.call(-1)'
+);
+
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-cannot-convert-to-primitive-err.js

@@ -0,0 +1,59 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  This value is an object which cannot be converted to a primitive
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+      b. If IsCallable(method) is true, then
+        i. Let result be ? Call(method, O).
+        ii. If Type(result) is not Object, return result.
+    6. Throw a TypeError exception.
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  [Symbol.toPrimitive]: undefined,
+  toString: undefined,
+  valueOf: undefined,
+};
+
+// If trimEnd is called on an object with neither Symbol.toPrimitive, toString
+// nor valueOf defined, then a TypeError exception should be thrown.
+assert.throws(
+  TypeError,
+  function() { String.prototype.trimEnd.call(thisVal); },
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-toprimitive-call-err.js

@@ -0,0 +1,36 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Abrupt completion when getting Symbol.toPrimitive method
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive).
+   ...
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  get [Symbol.toPrimitive]() {
+    throw new Test262Error();
+  },
+};
+
+assert.throws(Test262Error, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-toprimitive-meth-err.js

@@ -0,0 +1,38 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+    Abrupt completion when Symbol.toPrimitive abrupt completes.
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive).
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+   ...
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  [Symbol.toPrimitive]: function() {
+    throw new Test262Error();
+  },
+};
+
+assert.throws(Test262Error, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-toprimitive-meth-priority.js

@@ -0,0 +1,76 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Priority of Symbol[toPrimitive] when converting object to string for trimming
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+   ...
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+
+var toPrimitiveAccessed = 0;
+var toStringAccessed = 0;
+var valueOfAccessed = 0;
+var thisVal = {
+  get [Symbol.toPrimitive]() {
+    toPrimitiveAccessed += 1;
+    return function() { return '42 '; };
+  },
+  get toString() {
+    toStringAccessed += 1;
+    return function() { return ''; };
+  },
+  get valueOf() {
+    valueOfAccessed += 1;
+    return function() { return ''; };
+  },
+};
+
+// Test that thisVal[Symbol.toPrimitive] has been called.
+
+var result = String.prototype.trimEnd.call(thisVal);
+
+assert.sameValue(
+  toPrimitiveAccessed,
+  1,
+  'thisVal[Symbol.toPrimitive] expected to have been accessed.'
+);
+assert.sameValue(
+  result,
+  '42',
+  'thisVal[Symbol.toPrimitive] expected to have been called.',
+);
+
+// Test that thisVal.toString and thisVal.valueOf have not been accessedo
+
+assert.sameValue(
+  toStringAccessed,
+  0,
+  'thisVal.toString should not have been accessed.'
+);
+assert.sameValue(
+  valueOfAccessed,
+  0,
+  'thisVal.valueOf should not have been accessed.'
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-toprimitive-returns-object-err.js

@@ -0,0 +1,40 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+    Abrupt completion when Symbol.toPrimitive returns an object
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If arguement is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive).
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+   ...
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  [Symbol.toPrimitive]: function() {
+    return {};
+  },
+};
+
+assert.throws(TypeError, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-tostring-call-err.js

@@ -0,0 +1,53 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Abrupt completion when getting toString method
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  [Symbol.toPrimitive]: undefined,
+  get toString() {
+    throw new Test262Error();
+  },
+};
+
+assert.throws(Test262Error, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-tostring-meth-err.js

@@ -0,0 +1,55 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Abrupt completion when toString called and abrupt completes.
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+      b. If IsCallable(method) is true, then
+        i. Let result be ? Call(method, O).
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  [Symbol.toPrimitive]: undefined,
+  toString: function() {
+    throw new Test262Error();
+  },
+};
+
+assert.throws(Test262Error, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-tostring-meth-priority.js

@@ -0,0 +1,95 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Priority of toString when converting object to string for trimming
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+      b. If IsCallable(method) is true, then
+        i. Let result be ? Call(method, O).
+        ii. If Type(result) is not Object, return result.
+   ...
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var toPrimitiveAccessed = 0;
+var toStringAccessed = 0;
+var valueOfAccessed = 0;
+var thisVal = {
+  get [Symbol.toPrimitive]() {
+    toPrimitiveAccessed +=1;
+    return undefined;
+  },
+  get toString() {
+    toStringAccessed += 1;
+    return function() { return '42 '; };
+  },
+  get valueOf() {
+    valueOfAccessed += 1;
+    return function() { return ''; };
+  },
+};
+
+// Test that toString is called when Symbol.toPrimitive is undefined.
+
+var result = String.prototype.trimEnd.call(thisVal)
+
+assert.sameValue(
+  toPrimitiveAccessed,
+  1,
+  'thisVal.toString expected to have been accessed.'
+);
+assert.sameValue(
+  result,
+  '42',
+  'thisVal.toString expected to have been called.',
+);
+
+// Test that thisVal[toPrimitive] has been accessed.
+
+assert.sameValue(
+  toPrimitiveAccessed,
+  1,
+  'thisVal[Symbol.toPrimitive should have been accessed.'
+);
+
+// Test that thisVal.valueOf has not been accessed.
+
+assert.sameValue(
+  valueOfAccessed,
+  0,
+  'thisVal.valueOf should not have been accessed.'
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-tostring-returns-object-err.js

@@ -0,0 +1,58 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Abrupt completion when toString called and returns an object
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+      b. If IsCallable(method) is true, then
+        i. Let result be ? Call(method, O).
+        ii. If Type(result) is not Object, return result.
+    6. Throw a TypeError exception.
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+
+var thisVal = {
+  [Symbol.toPrimitive]: undefined,
+  toString: function() {
+    return {};
+  },
+};
+
+assert.throws(TypeError, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-valueof-call-err.js

@@ -0,0 +1,54 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Abrupt completion when getting valueOf method
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  [Symbol.toPrimitive]: undefined,
+  toString: undefined,
+  get valueOf() {
+    throw new Test262Error();
+  },
+};
+
+assert.throws(Test262Error, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-valueof-meth-err.js

@@ -0,0 +1,56 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Abrupt completion when valueOf called and abrupt completes.
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+      b. If IsCallable(method) is true, then
+        i. Let result be ? Call(method, O).
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  [Symbol.toPrimitive]: undefined,
+  toString: undefined,
+  valueOf: function() {
+    throw new Test262Error();
+  },
+};
+
+assert.throws(Test262Error, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-valueof-meth-priority.js

@@ -0,0 +1,93 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Priority of valueOf when converting object to string for trimming
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+      b. If IsCallable(method) is true, then
+        i. Let result be ? Call(method, O).
+        ii. If Type(result) is not Object, return result.
+   ...
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+var toPrimitiveAccessed = 0;
+var toStringAccessed = 0;
+var valueOfAccessed = 0;
+var thisVal = {
+  get [Symbol.toPrimitive]() {
+    toPrimitiveAccessed += 1;
+    return undefined;
+  },
+  get toString() {
+    toStringAccessed += 1;
+    return undefined;
+  },
+  get valueOf() {
+    valueOfAccessed += 1;
+    return function() { return '42 '; };
+  },
+};
+
+// Test that valueOf is called when Symbol.toPrimitive and toString are both
+// undefined.
+
+var result = String.prototype.trimEnd.call(thisVal);
+
+assert.sameValue(
+  valueOfAccessed,
+  1,
+  'thisVal.toString expected to have been accessed.'
+);
+assert.sameValue(
+  result,
+  '42',
+  'thisVal.valueOf expected to have been called.',
+);
+
+// Test that thisVal[toPrimitive] and thisVal.toString has been accessed.
+
+assert.sameValue(
+  toPrimitiveAccessed,
+  1,
+  'thisVal[Symbol.toPrimitive should have been accessed.'
+);
+assert.sameValue(
+  toStringAccessed,
+  1,
+  'thisVal[Symbol.toString should have been accessed.'
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-object-valueof-returns-object-err.js

@@ -0,0 +1,59 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: >
+  Abrupt completion when valueOf called and returns an object
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+      b. If IsCallable(method) is true, then
+        i. Let result be ? Call(method, O).
+        ii. If Type(result) is not Object, return result.
+    6. Throw a TypeError exception.
+features: [string-trimming, String.prototype.trimEnd, Symbol.toPrimitive]
+---*/
+
+
+var thisVal = {
+  [Symbol.toPrimitive]: undefined,
+  toString: undefined,
+  valueOf: function() {
+    return {};
+  },
+};
+
+assert.throws(TypeError, function() {
+  String.prototype.trimEnd.call(thisVal);
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-symbol-typeerror.js

@@ -0,0 +1,26 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: Type error when "this" value is a Symbol
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  2. Let S be ? ToString(str).
+
+  ToString ( argument )
+  Argument Type: Symbol
+  Result: Throw a TypeError exception
+features: [string-trimming, String.prototype.trimEnd]
+---*/
+
+var trimEnd = String.prototype.trimEnd;
+var symbol = Symbol();
+
+assert.throws(
+  TypeError,
+  function() { trimEnd.call(symbol); },
+  'String.prototype.trimEnd.call(Symbol())'
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimEnd/this-value-whitespace.js

@@ -0,0 +1,35 @@
+// Copyright (c) 2017 Valerie Young.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimEnd
+description: TrimEnd removes all whitespace from the end of a string.
+info: |
+  Runtime Symantics: TrimString ( string, where )
+  ...
+  3. Else if where is "end", let T be a String value that is a copy of S with
+     trailing white space removed.
+  ...
+
+  The definition of white space is the union of WhiteSpace and LineTerminator.
+  When determining whether a Unicode code point is in Unicode general category
+  “Zs”, code unit sequences are interpreted as UTF-16 encoded code point
+  sequences as specified in 6.1.4.
+
+features: [string-trimming, String.prototype.trimEnd]
+---*/
+
+var trimEnd = String.prototype.trimEnd;
+
+// A string of all valid WhiteSpace Unicode code points
+var wspc = '\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
+
+var str = wspc + 'a' + wspc + 'b' + wspc;
+var expected = wspc + 'a' + wspc + 'b';
+
+assert.sameValue(
+  trimEnd.call(str),
+  expected,
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimStart/length.js

@@ -0,0 +1,33 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimStart
+description: >
+  String.prototype.trimStart.length is 0.
+info: >
+  String.prototype.trimStart ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, has a length
+    property whose value is an integer. Unless otherwise specified, this
+    value is equal to the largest number of named arguments shown in the
+    subclause headings for the function description, including optional
+    parameters. However, rest parameters shown using the form “...name”
+    are not included in the default argument count.
+
+    Unless otherwise specified, the length property of a built-in Function
+    object has the attributes { [[Writable]]: false, [[Enumerable]]: false,
+    [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [string-trimming, String.prototype.trimStart]
+---*/
+
+verifyProperty(String.prototype.trimStart, "length", {
+  value: 0,
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimStart/name.js

@@ -0,0 +1,30 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimStart
+description: >
+  String.prototype.trimStart.name is "trimStart".
+info: >
+  String.prototype.trimStart ( )
+
+  17 ECMAScript Standard Built-in Objects:
+    Every built-in Function object, including constructors, that is not
+    identified as an anonymous function has a name property whose value
+    is a String.
+
+    Unless otherwise specified, the name property of a built-in Function
+    object, if it exists, has the attributes { [[Writable]]: false,
+    [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [string-trimming, String.prototype.trimStart]
+---*/
+
+verifyProperty(String.prototype.trimStart, "name", {
+  value: "trimStart",
+  enumerable: false,
+  writable: false,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimStart/prop-desc.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2017 The Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimStart
+description: >
+  "trimStart" property of String.prototype
+info: >
+  17 ECMAScript Standard Built-in Objects:
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+  [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+features: [string-trimming, String.prototype.trimStart]
+---*/
+
+verifyProperty(String.prototype, "trimStart", {
+  enumerable: false,
+  writable: true,
+  configurable: true,
+});
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-boolean.js

@@ -0,0 +1,33 @@
+// Copyright (c) 2017 Valerie Young.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimStart
+description: Behavior when "this" value is a boolean.
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  2. Let S be ? ToString(str).
+
+  ToString ( argument )
+  Argument Type: Boolean
+  Result:
+    If argument is true, return "true".
+    If argument is false, return "false".
+features: [string-trimming, String.prototype.trimStart]
+---*/
+
+var trimStart = String.prototype.trimStart
+
+assert.sameValue(
+  trimStart.call(true),
+  'true',
+  'String.prototype.trimStart.call(true)'
+);
+
+assert.sameValue(
+  String.prototype.trimStart.call(false),
+  'false',
+  'String.prototype.trimStart.call(false)'
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-line-terminator.js

@@ -0,0 +1,32 @@
+// Copyright (c) 2017 Valerie Young.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimStart
+description: TrimStart removes all line terminators from the start of a string.
+info: |
+  Runtime Symantics: TrimString ( string, where )
+  ...
+  4. If where is "start", let T be a String value that is a copy of S with
+     trailing white space removed.
+  ...
+
+  The definition of white space is the union of WhiteSpace and LineTerminator.
+
+features: [string-trimming, String.prototype.trimStart]
+---*/
+
+var trimStart = String.prototype.trimStart;
+
+// A string of all valid LineTerminator Unicode code points
+var lt = '\u000A\u000D\u2028\u2029';
+
+var str = lt + 'a' + lt + 'b' + lt;
+var expected = 'a' + lt + 'b' + lt;
+
+assert.sameValue(
+  trimStart.call(str),
+  expected,
+);
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-not-obj-coercible.js

@@ -0,0 +1,24 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimStart
+description: The "this" value must be object-coercible
+info: |
+  1. Let O be ? RequireObjectCoercible(this value).
+features: [string-trimming, String.prototype.trimStart]
+---*/
+
+var trimStart = String.prototype.trimStart;
+
+assert.sameValue(typeof trimStart, 'function');
+
+assert.throws(TypeError, function() {
+  trimStart.call(undefined);
+}, 'undefined');
+
+assert.throws(TypeError, function() {
+  trimStart.call(null);
+}, 'null');
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-number.js

@@ -0,0 +1,50 @@
+// Copyright (c) 2017 Valerie Young.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimStart
+description: Behavoir when "this" value is a number.
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  2. Let S be ? ToString(str).
+
+  ToString ( argument )
+  Argument Type: Number
+  Result: NumberToString(argument)
+features: [string-trimming, String.prototype.trimStart]
+---*/
+
+var trimStart = String.prototype.trimStart
+
+assert.sameValue(
+  trimStart.call(NaN),
+  'NaN',
+  'String.prototype.trimStart.call(NaN)'
+);
+
+assert.sameValue(
+  trimStart.call(Infinity),
+  'Infinity',
+  'String.prototype.trimStart.call(Infinity)'
+);
+
+assert.sameValue(
+  trimStart.call(-0),
+  '0',
+  'String.prototype.trimStart.call(-0)'
+);
+
+assert.sameValue(
+  trimStart.call(1),
+  '1',
+  'String.prototype.trimStart.call(1)'
+);
+
+assert.sameValue(
+  trimStart.call(-1),
+  '-1',
+  'String.prototype.trimStart.call(-1)'
+);
+
+
+reportCompare(0, 0);

js/src/tests/test262/built-ins/String/prototype/trimStart/this-value-object-cannot-convert-to-primitive-err.js

@@ -0,0 +1,59 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-string.prototype.trimStart
+description: >
+  This value is an object which cannot be converted to a primitive
+info: |
+  Runtime Semantics: TrimString ( string, where )
+  1. Let str be ? RequireObjectCoercible(string).
+  2. Let S be ? ToString(str).
+   ...
+
+  ToString ( argument )
+  If argument is Object:
+    1. Let primValue be ? ToPrimitive(argument, hint String).
+   ...
+
+  ToPrimitive ( input [, PreferredType ])
+   ...
+    b. Else if PreferredType is hint String, let hint be "string".
+   ...
+    d. Let exoticToPrim be ? GetMethod(input, @@toPrimitive)
+    e. If exoticToPrim is not undefined, then
+      i. Let result be ? Call(exoticToPrim, input, « hint »).
+      ii. If Type(result) is not Object, return result.
+      iii. Throw a TypeError exception.
+    f. If hint is "default", set hint to "number".
+    g. Return ? OrdinaryToPrimitive(input, hint).
+   ...
+
+  OrdinaryToPrimitive( O, hint )
+   ...
+    3. If hint is "string", then
+      a. Let methodNames be « "toString", "valueOf" ».
+   ...
+    5. For each name in methodNames in List order, do
+      a. Let method be ? Get(O, name).
+      b. If IsCallable(method) is true, then
+        i. Let result be ? Call(method, O).
+        ii. If Type(result) is not Object, return result.
+    6. Throw a TypeError exception.
+features: [string-trimming, String.prototype.trimStart, Symbol.toPrimitive]
+---*/
+
+var thisVal = {
+  [Symbol.toPrimitive]: undefined,
+  toString: undefined,
+  valueOf: undefined,
+};
+
+// If trimStart is called on an object with neither Symbol.toPrimitive, toString
+// nor valueOf defined, then a TypeError exception should be thrown.
+assert.throws(
+  TypeError,
+  function() { String.prototype.trimStart.call(thisVal); },
+);
+
+reportCompare(0, 0);