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8cfccda542
Continued from #6536 The current implementations of `ChildNode::before` and `ChildNode::after` do not match the WHATWG spec. This commit updates the implementations to match the spec. Our current implementation of `ChildNode::after` passes all the WPT tests. So I made sure to add a regression test that failed with the current implementation. There are a few other unit tests I added to exhaust other corner cases I encountered.
166 lines
6.2 KiB
HTML
166 lines
6.2 KiB
HTML
<!DOCTYPE html>
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<meta charset=utf-8>
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<title>ChildNode.before</title>
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<link rel=help href="https://dom.spec.whatwg.org/#dom-childnode-before">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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function test_before(child, nodeName, innerHTML) {
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test(function() {
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var parent = document.createElement('div');
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parent.appendChild(child);
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child.before();
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assert_equals(parent.innerHTML, innerHTML);
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}, nodeName + '.before() without any argument.');
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test(function() {
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var parent = document.createElement('div');
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parent.appendChild(child);
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child.before(null);
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var expected = 'null' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with null as an argument.');
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test(function() {
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var parent = document.createElement('div');
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parent.appendChild(child);
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child.before(undefined);
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var expected = 'undefined' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with undefined as an argument.');
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test(function() {
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var parent = document.createElement('div');
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parent.appendChild(child);
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child.before('');
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assert_equals(parent.firstChild.data, '');
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}, nodeName + '.before() with the empty string as an argument.');
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test(function() {
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var parent = document.createElement('div');
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parent.appendChild(child);
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child.before('text');
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var expected = 'text' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with only text as an argument.');
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test(function() {
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var parent = document.createElement('div');
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var x = document.createElement('x');
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parent.appendChild(child);
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child.before(x);
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var expected = '<x></x>' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with only one element as an argument.');
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test(function() {
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var parent = document.createElement('div');
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var x = document.createElement('x');
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parent.appendChild(child);
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child.before(x, 'text');
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var expected = '<x></x>text' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with one element and text as arguments.');
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test(function() {
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var parent = document.createElement('div');
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parent.appendChild(child);
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child.before('text', child);
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var expected = 'text' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with context object itself as the argument.');
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test(function() {
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var parent = document.createElement('div')
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var x = document.createElement('x');
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parent.appendChild(child);
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parent.appendChild(x);
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child.before(x, child);
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var expected = '<x></x>' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with context object itself and node as the arguments, switching positions.');
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test(function() {
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var parent = document.createElement('div');
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var x = document.createElement('x');
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var y = document.createElement('y');
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var z = document.createElement('z');
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parent.appendChild(y);
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parent.appendChild(child);
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parent.appendChild(x);
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child.before(x, y, z);
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var expected = '<x></x><y></y><z></z>' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with all siblings of child as arguments.');
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test(function() {
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var parent = document.createElement('div')
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var x = document.createElement('x');
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var y = document.createElement('y');
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var z = document.createElement('z');
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parent.appendChild(x);
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parent.appendChild(y);
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parent.appendChild(z);
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parent.appendChild(child);
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child.before(y, z);
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var expected = '<x></x><y></y><z></z>' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with some siblings of child as arguments; no changes in tree; viable sibling is first child.');
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test(function() {
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var parent = document.createElement('div')
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var v = document.createElement('v');
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var x = document.createElement('x');
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var y = document.createElement('y');
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var z = document.createElement('z');
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parent.appendChild(v);
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parent.appendChild(x);
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parent.appendChild(y);
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parent.appendChild(z);
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parent.appendChild(child);
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child.before(y, z);
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var expected = '<v></v><x></x><y></y><z></z>' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with some siblings of child as arguments; no changes in tree.');
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test(function() {
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var parent = document.createElement('div');
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var x = document.createElement('x');
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var y = document.createElement('y');
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parent.appendChild(x);
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parent.appendChild(y);
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parent.appendChild(child);
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child.before(y, x);
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var expected = '<y></y><x></x>' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() when pre-insert behaves like prepend.');
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test(function() {
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var parent = document.createElement('div');
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var x = document.createElement('x');
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parent.appendChild(x);
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parent.appendChild(document.createTextNode('1'));
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var y = document.createElement('y');
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parent.appendChild(y);
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parent.appendChild(child);
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child.before(x, '2');
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var expected = '1<y></y><x></x>2' + innerHTML;
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assert_equals(parent.innerHTML, expected);
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}, nodeName + '.before() with one sibling of child and text as arguments.');
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test(function() {
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var x = document.createElement('x');
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var y = document.createElement('y');
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x.before(y);
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assert_equals(x.previousSibling, null);
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}, nodeName + '.before() on a child without any parent.');
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}
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test_before(document.createComment('test'), 'Comment', '<!--test-->');
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test_before(document.createElement('test'), 'Element', '<test></test>');
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test_before(document.createTextNode('test'), 'Text', 'test');
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</script>
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</html>
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