JavaScript Test - test destructuring assignment order, bug 349937, by Jeff Walden

js/tests/js1_7/lexical/destructuring-order.js

@@ -0,0 +1,183 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is JavaScript Engine testing utilities.
+ *
+ * The Initial Developer of the Original Code is
+ * Jeff Walden <jwalden+code@mit.edu>.
+ * Portions created by the Initial Developer are Copyright (C) 2006
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+//-----------------------------------------------------------------------------
+var bug     = "(none)";
+var summary = "Order of destructuring, destructuring in the presence of " +
+              "exceptions";
+var actual, expect;
+
+printBugNumber(bug);
+printStatus(summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var failed = false;
+
+
+var a = "FAILED", b = "PASSED";
+
+function exceptObj()
+{
+  return { get b() { throw "PASSED"; }, a: "PASSED" };
+}
+
+function partialEvalObj()
+{
+  try
+  {
+    ({a:a, b:b}) = exceptObj();
+    throw "FAILED";
+  }
+  catch (ex)
+  {
+    if (ex !== "PASSED")
+      throw "bad exception thrown: " + ex;
+  }
+}
+
+
+var c = "FAILED", d = "FAILED", e = "PASSED", f = "PASSED";
+
+function exceptArr()
+{
+  return ["PASSED", {e: "PASSED", get f() { throw "PASSED"; }}, "FAILED"];
+}
+
+function partialEvalArr()
+{
+  try
+  {
+    [c, {e: d, f: e}, f] = exceptArr();
+    throw "FAILED";
+  }
+  catch (ex)
+  {
+    if (ex !== "PASSED")
+      throw "bad exception thrown: " + ex;
+  }
+}
+
+
+var g = "FAILED", h = "FAILED", i = "FAILED", j = "FAILED", k = "FAILED";
+var _g = "PASSED", _h = "FAILED", _i = "FAILED", _j = "FAILED", _k = "FAILED";
+var order = [];
+
+function objWithGetters()
+{
+  return {
+           get j()
+           {
+             var rv = _j;
+             _g = _h = _i = _j = "FAILED";
+             _k = "PASSED";
+             order.push("j");
+             return rv;
+           },
+           get g()
+           {
+             var rv = _g;
+             _g = _i = _j = _k = "FAILED";
+             _h = "PASSED";
+             order.push("g");
+             return rv;
+           },
+           get i()
+           {
+             var rv = _i;
+             _g = _h = _i = _k = "FAILED";
+             _j = "PASSED";
+             order.push("i");
+             return rv;
+           },
+           get k()
+           {
+             var rv = _k;
+             _g = _h = _i = _j = _k = "FAILED";
+             order.push("k");
+             return rv;
+           },
+           get h()
+           {
+             var rv = _h;
+             _g = _h = _j = _k = "FAILED";
+             _i = "PASSED";
+             order.push("h");
+             return rv;
+           }
+         };
+}
+
+function partialEvalObj2()
+{
+  ({g: g, h: h, i: i, j: j, k: k}) = objWithGetters();
+}
+
+try
+{
+  partialEvalObj();
+  if (a !== "PASSED" || b !== "PASSED")
+    throw "FAILED: lhs not mutated correctly during destructuring!\n" +
+          "a == " + a + ", b == " + b;
+
+  partialEvalObj2();
+  if (g !== "PASSED" ||
+      h !== "PASSED" ||
+      i !== "PASSED" ||
+      j !== "PASSED" ||
+      k !== "PASSED")
+    throw "FAILED: order of property accesses wrong!\n" +
+          "order == " + order;
+
+  partialEvalArr();
+  if (c !== "PASSED" || d !== "PASSED" || e !== "PASSED")
+    throw "FAILED: lhs not mutated correctly during destructuring!\n" +
+          "c == " + c +
+          ", d == " + d +
+          ", e == " + e +
+          ", f == " + f ;
+}
+catch (ex)
+{
+  failed = ex;
+}
+
+expect = false;
+actual = failed;
+
+reportCompare(expect, actual, summary);