src/third_party/web_platform_tests/dom/ranges/Range-collapse.html

<!doctype html>
<title>Range.collapse() and .collapsed tests</title>
<link rel="author" title="Aryeh Gregor" href=ayg@aryeh.name>
<meta name=timeout content=long>
<div id=log></div>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=../common.js></script>
<script>
"use strict";

function testCollapse(rangeEndpoints, toStart) {
  var range;
  if (rangeEndpoints == "detached") {
    range = document.createRange();
    range.detach(); // should be a no-op and therefore the following should not throw
    range.collapse(toStart);
    assert_equals(true, range.collapsed);
  }

  // Have to account for Ranges involving Documents!
  var ownerDoc = rangeEndpoints[0].nodeType == Node.DOCUMENT_NODE
    ? rangeEndpoints[0]
    : rangeEndpoints[0].ownerDocument;
  range = ownerDoc.createRange();
  range.setStart(rangeEndpoints[0], rangeEndpoints[1]);
  range.setEnd(rangeEndpoints[2], rangeEndpoints[3]);

  var expectedContainer = toStart ? range.startContainer : range.endContainer;
  var expectedOffset = toStart ? range.startOffset : range.endOffset;

  assert_equals(range.collapsed, range.startContainer == range.endContainer
    && range.startOffset == range.endOffset,
    "collapsed must be true if and only if the start and end are equal");

  if (toStart === undefined) {
    range.collapse();
  } else {
    range.collapse(toStart);
  }

  assert_equals(range.startContainer, expectedContainer,
    "Wrong startContainer");
  assert_equals(range.endContainer, expectedContainer,
    "Wrong endContainer");
  assert_equals(range.startOffset, expectedOffset,
    "Wrong startOffset");
  assert_equals(range.endOffset, expectedOffset,
    "Wrong endOffset");
  assert_true(range.collapsed,
    ".collapsed must be set after .collapsed()");
}

var tests = [];
for (var i = 0; i < testRanges.length; i++) {
  tests.push([
    "Range " + i + " " + testRanges[i] + ", toStart true",
    eval(testRanges[i]),
    true
  ]);
  tests.push([
    "Range " + i + " " + testRanges[i] + ", toStart false",
    eval(testRanges[i]),
    false
  ]);
  tests.push([
    "Range " + i + " " + testRanges[i] + ", toStart omitted",
    eval(testRanges[i]),
    undefined
  ]);
}
generate_tests(testCollapse, tests);

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