firefox/testing/web-platform/tests/selection/collapseToStartEnd.html

<!doctype html>
<title>Selection.collapseTo(Start|End)() tests</title>
<div id=log></div>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=common.js></script>
<script>
"use strict";

test(function() {
   selection.removeAllRanges();
   assert_throws_dom("INVALID_STATE_ERR", function() {
       selection.collapseToStart();
   });
}, "Must throw InvalidStateErr if the selection's range is null");

for (var i = 0; i < testRanges.length; i++) {
    var endpoints = eval(testRanges[i]);
    if (!isSelectableNode(endpoints[0]) || !isSelectableNode(endpoints[2]))
        continue;
    test(function() {
        selection.removeAllRanges();

        var addedRange = ownerDocument(endpoints[0]).createRange();
        addedRange.setStart(endpoints[0], endpoints[1]);
        addedRange.setEnd(endpoints[2], endpoints[3]);
        selection.addRange(addedRange);

        // We don't penalize browsers here for mishandling addRange() and
        // adding a different range than we specified.  They fail addRange()
        // tests for that, and don't have to fail collapseToStart/End() tests
        // too.  They do fail if they throw unexpectedly, though.  I also fail
        // them if there's no range at all, because otherwise they could pass
        // all tests if addRange() always does nothing and collapseToStart()
        // always throws.
        assert_equals(selection.rangeCount, 1,
            "Sanity check: rangeCount must equal 1 after addRange()");

        var expectedEndpoint = [
            selection.getRangeAt(0).startContainer,
            selection.getRangeAt(0).startOffset
        ];

        selection.collapseToStart();

        assert_equals(selection.rangeCount, 1,
            "selection.rangeCount must equal 1");
        assert_equals(selection.focusNode, expectedEndpoint[0],
            "focusNode must equal the original start node");
        assert_equals(selection.focusOffset, expectedEndpoint[1],
            "focusOffset must equal the original start offset");
        assert_equals(selection.anchorNode, expectedEndpoint[0],
            "anchorNode must equal the original start node");
        assert_equals(selection.anchorOffset, expectedEndpoint[1],
            "anchorOffset must equal the original start offset");
        assert_equals(addedRange.startContainer, endpoints[0],
            "collapseToStart() must not change the startContainer of the selection's original range");
        assert_equals(addedRange.startOffset, endpoints[1],
            "collapseToStart() must not change the startOffset of the selection's original range");
        assert_equals(addedRange.endContainer, endpoints[2],
            "collapseToStart() must not change the endContainer of the selection's original range");
        assert_equals(addedRange.endOffset, endpoints[3],
            "collapseToStart() must not change the endOffset of the selection's original range");
    }, "Range " + i + " " + testRanges[i] + " collapseToStart()");

    // Copy-paste of above
    test(function() {
        selection.removeAllRanges();

        var addedRange = ownerDocument(endpoints[0]).createRange();
        addedRange.setStart(endpoints[0], endpoints[1]);
        addedRange.setEnd(endpoints[2], endpoints[3]);
        selection.addRange(addedRange);

        // We don't penalize browsers here for mishandling addRange() and
        // adding a different range than we specified.  They fail addRange()
        // tests for that, and don't have to fail collapseToStart/End() tests
        // too.  They do fail if they throw unexpectedly, though.  I also fail
        // them if there's no range at all, because otherwise they could pass
        // all tests if addRange() always does nothing and collapseToStart()
        // always throws.
        assert_equals(selection.rangeCount, 1,
            "Sanity check: rangeCount must equal 1 after addRange()");

        var expectedEndpoint = [
            selection.getRangeAt(0).endContainer,
            selection.getRangeAt(0).endOffset
        ];

        selection.collapseToEnd();

        assert_equals(selection.rangeCount, 1,
            "selection.rangeCount must equal 1");
        assert_equals(selection.focusNode, expectedEndpoint[0],
            "focusNode must equal the original end node");
        assert_equals(selection.focusOffset, expectedEndpoint[1],
            "focusOffset must equal the original end offset");
        assert_equals(selection.anchorNode, expectedEndpoint[0],
            "anchorNode must equal the original end node");
        assert_equals(selection.anchorOffset, expectedEndpoint[1],
            "anchorOffset must equal the original end offset");
        assert_equals(addedRange.startContainer, endpoints[0],
            "collapseToEnd() must not change the startContainer of the selection's original range");
        assert_equals(addedRange.startOffset, endpoints[1],
            "collapseToEnd() must not change the startOffset of the selection's original range");
        assert_equals(addedRange.endContainer, endpoints[2],
            "collapseToEnd() must not change the endContainer of the selection's original range");
        assert_equals(addedRange.endOffset, endpoints[3],
            "collapseToEnd() must not change the endOffset of the selection's original range");
    }, "Range " + i + " " + testRanges[i] + " collapseToEnd()");
}

testDiv.style.display = "none";
</script>