third_party/web_platform_tests/dom/ranges/Range-cloneRange.html

<!doctype html>
<title>Range.cloneRange() and document.createRange() 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 testCloneRange(rangeEndpoints) {
  var range;
  if (rangeEndpoints == "detached") {
    range = document.createRange();
    range.detach();
    var clonedRange = range.cloneRange();
    assert_equals(clonedRange.startContainer, range.startContainer,
      "startContainers must be equal after cloneRange()");
    assert_equals(clonedRange.startOffset, range.startOffset,
      "startOffsets must be equal after cloneRange()");
    assert_equals(clonedRange.endContainer, range.endContainer,
      "endContainers must be equal after cloneRange()");
    assert_equals(clonedRange.endOffset, range.endOffset,
      "endOffsets must be equal after cloneRange()");
    return;
  }

  // Have to account for Ranges involving Documents!  We could just create
  // the Range from the current document unconditionally, but some browsers
  // (WebKit) don't implement setStart() and setEnd() per spec and will throw
  // spurious exceptions at the time of this writing.  No need to mask other
  // bugs.
  var ownerDoc = rangeEndpoints[0].nodeType == Node.DOCUMENT_NODE
    ? rangeEndpoints[0]
    : rangeEndpoints[0].ownerDocument;
  range = ownerDoc.createRange();
  // Here we throw in some createRange() tests, because why not.  Have to
  // test it someplace.
  assert_equals(range.startContainer, ownerDoc,
    "doc.createRange() must create Range whose startContainer is doc");
  assert_equals(range.endContainer, ownerDoc,
    "doc.createRange() must create Range whose endContainer is doc");
  assert_equals(range.startOffset, 0,
    "doc.createRange() must create Range whose startOffset is 0");
  assert_equals(range.endOffset, 0,
    "doc.createRange() must create Range whose endOffset is 0");

  range.setStart(rangeEndpoints[0], rangeEndpoints[1]);
  range.setEnd(rangeEndpoints[2], rangeEndpoints[3]);

  // Make sure we bail out now if setStart or setEnd are buggy, so it doesn't
  // create misleading failures later.
  assert_equals(range.startContainer, rangeEndpoints[0],
    "Sanity check on setStart()");
  assert_equals(range.startOffset, rangeEndpoints[1],
    "Sanity check on setStart()");
  assert_equals(range.endContainer, rangeEndpoints[2],
    "Sanity check on setEnd()");
  assert_equals(range.endOffset, rangeEndpoints[3],
    "Sanity check on setEnd()");

  var clonedRange = range.cloneRange();

  assert_equals(clonedRange.startContainer, range.startContainer,
    "startContainers must be equal after cloneRange()");
  assert_equals(clonedRange.startOffset, range.startOffset,
    "startOffsets must be equal after cloneRange()");
  assert_equals(clonedRange.endContainer, range.endContainer,
    "endContainers must be equal after cloneRange()");
  assert_equals(clonedRange.endOffset, range.endOffset,
    "endOffsets must be equal after cloneRange()");

  // Make sure that modifying one doesn't affect the other.
  var testNode1 = ownerDoc.createTextNode("testing");
  var testNode2 = ownerDoc.createTextNode("testing with different length");

  range.setStart(testNode1, 1);
  range.setEnd(testNode1, 2);
  assert_equals(clonedRange.startContainer, rangeEndpoints[0],
    "Modifying a Range must not modify its clone's startContainer");
  assert_equals(clonedRange.startOffset, rangeEndpoints[1],
    "Modifying a Range must not modify its clone's startOffset");
  assert_equals(clonedRange.endContainer, rangeEndpoints[2],
    "Modifying a Range must not modify its clone's endContainer");
  assert_equals(clonedRange.endOffset, rangeEndpoints[3],
    "Modifying a Range must not modify its clone's endOffset");

  clonedRange.setStart(testNode2, 3);
  clonedRange.setStart(testNode2, 4);

  assert_equals(range.startContainer, testNode1,
    "Modifying a clone must not modify the original Range's startContainer");
  assert_equals(range.startOffset, 1,
    "Modifying a clone must not modify the original Range's startOffset");
  assert_equals(range.endContainer, testNode1,
    "Modifying a clone must not modify the original Range's endContainer");
  assert_equals(range.endOffset, 2,
    "Modifying a clone must not modify the original Range's endOffset");
}

var tests = [];
for (var i = 0; i < testRanges.length; i++) {
  tests.push([
    "Range " + i + " " + testRanges[i],
    eval(testRanges[i])
  ]);
}
generate_tests(testCloneRange, tests);

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