css/css-highlight-api/Highlight-iteration-with-modifications.html - external/github.com/web-platform-tests/wpt - Git at Google

 <!doctype html>
 <title>Highlight iteration with insertions and deletions inbetween</title>
 <link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <div id='testDiv'>abc</div>
 <script>
   'use strict';
   let container = document.getElementById('testDiv');
   let range1 = new StaticRange({startContainer: container, startOffset: 0, endContainer: container, endOffset: 1});
   let range2 = new Range();

   // Test insertions using .add
   test(() => {
     let customHighlight = new Highlight();
     let iterator = customHighlight[Symbol.iterator]();
     customHighlight.add(range1);
     let element = iterator.next();
     assert_false(element.done, 'The iteration continues when a new range is added after starting the iteration');
     assert_equals(element.value, range1, 'A range added after starting the iteration is found during the current iteration, following Set semantics');
     element = iterator.next();
     assert_true(element.done, 'The iteration ends after visiting the added range');
     assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends');
   }, 'Highlight iteration includes ranges added after starting the iteration (Set-like behavior)');

   test(() => {
     let customHighlight = new Highlight(range1);
     let iterator = customHighlight[Symbol.iterator]();
     customHighlight.add(range2);
     let element = iterator.next();
     assert_false(element.done, 'The iteration continues with the first range');
     assert_equals(element.value, range1, 'The first range is returned');
     element = iterator.next();
     assert_false(element.done, 'The iteration continues to the range added after starting the iteration, following Set semantics');
     assert_equals(element.value, range2, 'The range added after starting the iteration is visited');
     element = iterator.next();
     assert_true(element.done, 'The iteration ends after visiting both ranges');
     assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends');
   }, 'Highlight iteration includes ranges added after starting the iteration when there were already ranges (Set-like behavior)');

   // Test deletions using .delete
   test(() => {
     let customHighlight = new Highlight(range1);
     let iterator = customHighlight[Symbol.iterator]();
     customHighlight.delete(range1);
     let element = iterator.next();
     assert_true(element.done, 'The iteration ends when the only range is deleted before visiting it, following Set semantics');
     assert_equals(element.value, undefined, 'A range deleted before being visited is not returned during iteration');
   }, 'Highlight iteration skips ranges deleted before being visited (Set-like behavior)');

   test(() => {
     let customHighlight = new Highlight(range1, range2);
     let iterator = customHighlight[Symbol.iterator]();
     customHighlight.delete(range2);
     let element = iterator.next();
     assert_false(element.done, 'The iteration continues with the first range');
     assert_equals(element.value, range1, 'The first range is returned');
     element = iterator.next();
     assert_true(element.done, 'The iteration ends after the first range since the second range was deleted before being visited, following Set semantics');
     assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends');
   }, 'Highlight iteration skips ranges deleted before being visited even when other ranges remain (Set-like behavior)');

   test(() => {
     let customHighlight = new Highlight(range1, range2);
     let iterator = customHighlight[Symbol.iterator]();
     let element = iterator.next();
     assert_false(element.done, 'The iteration doesn\'t end when there are still two ranges to visit');
     assert_equals(element.value, range1, 'The range that was pointed to by the iterator is returned as it should');
     customHighlight.delete(range1);
     element = iterator.next();
     assert_false(element.done, 'The iteration doesn\'t end when the range previously visited is deleted and there is still a range to visit');
     assert_equals(element.value, range2, 'The range that was pointed to by the iterator is returned as it should although the previous range was deleted after calling .next');
     element = iterator.next();
     assert_true(element.done, 'The iteration ends after going through all the ranges although the first range was deleted after the first call to .next');
     assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends');
   }, 'Highlight iteration is not modified when a range that was already visited is deleted and there are still ranges to visit');

   // Test deletions using .clear
   test(() => {
     let customHighlight = new Highlight(range1);
     let iterator = customHighlight[Symbol.iterator]();
     customHighlight.clear();
     let element = iterator.next();
     assert_true(element.done, 'The iteration ends when all ranges are cleared before visiting them, following Set semantics');
     assert_equals(element.value, undefined, '.clear() removes all ranges before iteration visits them');
   }, 'Highlight iteration skips all ranges when .clear() is called before visiting them (Set-like behavior)');

 </script>
	<!doctype html>
	<title>Highlight iteration with insertions and deletions inbetween</title>
	<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
	<script src="/resources/testharness.js"></script>
	<script src="/resources/testharnessreport.js"></script>
	<div id='testDiv'>abc</div>
	<script>
	'use strict';
	let container = document.getElementById('testDiv');
	let range1 = new StaticRange({startContainer: container, startOffset: 0, endContainer: container, endOffset: 1});
	let range2 = new Range();

	// Test insertions using .add
	test(() => {
	let customHighlight = new Highlight();
	let iterator = customHighlight[Symbol.iterator]();
	customHighlight.add(range1);
	let element = iterator.next();
	assert_false(element.done, 'The iteration continues when a new range is added after starting the iteration');
	assert_equals(element.value, range1, 'A range added after starting the iteration is found during the current iteration, following Set semantics');
	element = iterator.next();
	assert_true(element.done, 'The iteration ends after visiting the added range');
	assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends');
	}, 'Highlight iteration includes ranges added after starting the iteration (Set-like behavior)');

	test(() => {
	let customHighlight = new Highlight(range1);
	let iterator = customHighlight[Symbol.iterator]();
	customHighlight.add(range2);
	let element = iterator.next();
	assert_false(element.done, 'The iteration continues with the first range');
	assert_equals(element.value, range1, 'The first range is returned');
	element = iterator.next();
	assert_false(element.done, 'The iteration continues to the range added after starting the iteration, following Set semantics');
	assert_equals(element.value, range2, 'The range added after starting the iteration is visited');
	element = iterator.next();
	assert_true(element.done, 'The iteration ends after visiting both ranges');
	assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends');
	}, 'Highlight iteration includes ranges added after starting the iteration when there were already ranges (Set-like behavior)');

	// Test deletions using .delete
	test(() => {
	let customHighlight = new Highlight(range1);
	let iterator = customHighlight[Symbol.iterator]();
	customHighlight.delete(range1);
	let element = iterator.next();
	assert_true(element.done, 'The iteration ends when the only range is deleted before visiting it, following Set semantics');
	assert_equals(element.value, undefined, 'A range deleted before being visited is not returned during iteration');
	}, 'Highlight iteration skips ranges deleted before being visited (Set-like behavior)');

	test(() => {
	let customHighlight = new Highlight(range1, range2);
	let iterator = customHighlight[Symbol.iterator]();
	customHighlight.delete(range2);
	let element = iterator.next();
	assert_false(element.done, 'The iteration continues with the first range');
	assert_equals(element.value, range1, 'The first range is returned');
	element = iterator.next();
	assert_true(element.done, 'The iteration ends after the first range since the second range was deleted before being visited, following Set semantics');
	assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends');
	}, 'Highlight iteration skips ranges deleted before being visited even when other ranges remain (Set-like behavior)');

	test(() => {
	let customHighlight = new Highlight(range1, range2);
	let iterator = customHighlight[Symbol.iterator]();
	let element = iterator.next();
	assert_false(element.done, 'The iteration doesn\'t end when there are still two ranges to visit');
	assert_equals(element.value, range1, 'The range that was pointed to by the iterator is returned as it should');
	customHighlight.delete(range1);
	element = iterator.next();
	assert_false(element.done, 'The iteration doesn\'t end when the range previously visited is deleted and there is still a range to visit');
	assert_equals(element.value, range2, 'The range that was pointed to by the iterator is returned as it should although the previous range was deleted after calling .next');
	element = iterator.next();
	assert_true(element.done, 'The iteration ends after going through all the ranges although the first range was deleted after the first call to .next');
	assert_equals(element.value, undefined, '.next() returns undefined when the iteration ends');
	}, 'Highlight iteration is not modified when a range that was already visited is deleted and there are still ranges to visit');

	// Test deletions using .clear
	test(() => {
	let customHighlight = new Highlight(range1);
	let iterator = customHighlight[Symbol.iterator]();
	customHighlight.clear();
	let element = iterator.next();
	assert_true(element.done, 'The iteration ends when all ranges are cleared before visiting them, following Set semantics');
	assert_equals(element.value, undefined, '.clear() removes all ranges before iteration visits them');
	}, 'Highlight iteration skips all ranges when .clear() is called before visiting them (Set-like behavior)');

	</script>