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Add a test for HTMLSlotElement interface (web-platform-tests#2929)
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Import WebKit's test for HTMLSlotElement interface's test attribute and assignedNodes() from
http://trac.webkit.org/browser/trunk/LayoutTests/fast/shadow-dom/HTMLSlotElement-interface.html?rev=200285

All test cases pass on WebKit nightly builds, and some test cases fail on Google Chrome Canary builds
because the latter doesn't clear the list of assigned nodes when a slot element is removed from a tree.
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@rniwa
rniwa authored and Takayoshi Kochi committed May 20, 2016
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269 changes: 269 additions & 0 deletions shadow-dom/HTMLSlotElement-interface.html
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<!DOCTYPE html>
<html>
<head>
<title>Shadow DOM: HTMLSlotElement interface</title>
<meta name="author" title="Ryosuke Niwa" href="mailto:[email protected]">
<meta name="assert" content="HTMLSlotElement must exist on window with name attribute and getAssignedNode() method">
<link rel="help" href="https://w3c.github.io/webcomponents/spec/shadow/#the-slot-element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id="log"></div>
<script>

test(function () {
assert_true('HTMLSlotElement' in window, 'HTMLSlotElement must be defined on window');
assert_equals(HTMLSlotElement.prototype.__proto__, HTMLElement.prototype, 'HTMLSlotElement should inherit from HTMLElement');
assert_true(document.createElement('slot') instanceof HTMLSlotElement, 'slot element should be an instance of HTMLSlotElement');
assert_true(document.createElement('slot') instanceof HTMLElement, 'slot element should be an instance of HTMLElement');
}, 'HTMLSlotElement must be defined on window');

test(function () {
assert_true('name' in HTMLSlotElement.prototype, '"name" attribute must be defined on HTMLSlotElement.prototype');

var slotElement = document.createElement('slot');
assert_equals(slotElement.name, '', '"name" attribute must return the empty string when "name" content attribute is not set');

slotElement.setAttribute('name', 'foo');
assert_equals(slotElement.name, 'foo', '"name" attribute must return the value of the "name" content attribute');

slotElement.name = 'bar';
assert_equals(slotElement.name, 'bar', '"name" attribute must return the assigned value');
assert_equals(slotElement.getAttribute('name'), 'bar', '"name" attribute must update the "name" content attribute');
}, '"name" attribute on HTMLSlotElement must reflect "name" attribute');

function testSlotOutsideShadowTree(options)
{
test(function () {
assert_true('assignedNodes' in HTMLSlotElement.prototype, '"assignedNodes" method must be defined on HTMLSlotElement.prototype');

var slotElement = document.createElement('slot');
assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() must return an empty array when the slot element is not in any tree');

document.body.appendChild(slotElement);
assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() must return an empty array when the slot element is in a document tree');

}, 'assignedNodes(' + (options ? JSON.stringify(options) : '')
+ ') on a HTMLSlotElement must return an empty array when the slot element is not in a tree or in a document tree');
}

testSlotOutsideShadowTree(null);
testSlotOutsideShadowTree({flattened: false});
testSlotOutsideShadowTree({flattened: true});

function testSingleLevelOfSlotting(options)
{
test(function () {
assert_true('assignedNodes' in HTMLSlotElement.prototype, '"assignedNodes" method must be defined on HTMLSlotElement.prototype');

var shadowHost = document.createElement('div');
var child = document.createElement('p');

var shadowRoot = shadowHost.attachShadow({mode: 'open'});
var slotElement = document.createElement('slot');
shadowRoot.appendChild(slotElement);

assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() must return an empty array when there are no nodes in the shadow tree');

shadowHost.appendChild(child);
assert_array_equals(slotElement.assignedNodes(options), [child], 'assignedNodes() on a default slot must return an element without slot element');

child.setAttribute('slot', 'foo');
assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() on a default slot must not return an element with non-empty slot attribute');

child.setAttribute('slot', '');
assert_array_equals(slotElement.assignedNodes(options), [child], 'assignedNodes() on a default slot must return an element with empty slot attribute');

slotElement.setAttribute('name', 'bar');
assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes() on a named slot must not return an element with empty slot attribute');

slotElement.setAttribute('name', '');
assert_array_equals(slotElement.assignedNodes(options), [child], 'assignedNodes() on an empty name slot must return an element with empty slot attribute');

}, 'assignedNodes(' + (options ? JSON.stringify(options) : '') + ') must return the list of assigned nodes when none of the assigned nodes themselves are slots');
}

testSingleLevelOfSlotting(null);
testSingleLevelOfSlotting({flattened: false});
testSingleLevelOfSlotting({flattened: true});

function testMutatingSlottedContents(options)
{
test(function () {
var shadowHost = document.createElement('div');
var p = document.createElement('p');
var b = document.createElement('b');
shadowHost.appendChild(p);
shadowHost.appendChild(b);

var shadowRoot = shadowHost.attachShadow({mode: 'open'});
var slotElement = document.createElement('slot');
shadowRoot.appendChild(slotElement);

assert_array_equals(slotElement.assignedNodes(options), [p, b], 'assignedNodes must return the distributed nodes');

slotElement.name = 'foo';
assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes must be empty when there are no matching elements for the slot name');

b.slot = 'foo';
assert_array_equals(slotElement.assignedNodes(options), [b], 'assignedNodes must return the nodes with the matching slot name');

p.slot = 'foo';
assert_array_equals(slotElement.assignedNodes(options), [p, b], 'assignedNodes must return the nodes with the matching slot name in the tree order');

slotElement.removeAttribute('name');
assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes must be empty for a default slot when all elements have "slot" attributes specified');

}, 'assignedNodes(' + (options ? JSON.stringify(options) : '') + ') must update when slot and name attributes are modified');
}

testMutatingSlottedContents(null);
testMutatingSlottedContents({flattened: false});
testMutatingSlottedContents({flattened: true});

function testMutatingSlotName(options)
{
test(function () {
var shadowHost = document.createElement('div');
var child = document.createElement('span');
shadowHost.appendChild(child);

var shadowRoot = shadowHost.attachShadow({mode: 'open'});
var slotElement = document.createElement('slot');
slotElement.name = 'foo';
shadowRoot.appendChild(slotElement);

assert_array_equals(slotElement.assignedNodes(options), [], 'assignedNodes must be empty when there are no matching elements for the slot name');

slotElement.removeAttribute('name');
assert_array_equals(slotElement.assignedNodes(options), [child], 'assignedNodes must be empty when there are no matching elements for the slot name');

}, 'assignedNodes must update when a default slot is introduced dynamically by a slot rename');
}

testMutatingSlotName(null);
testMutatingSlottedContents({flattened: false});
testMutatingSlottedContents({flattened: true});

function testInsertingAndRemovingSlots(options)
{
test(function () {
var shadowHost = document.createElement('div');
var p = document.createElement('p');
var text = document.createTextNode('');
var comment = document.createComment('');
var processingInstruction = document.createProcessingInstruction('target', 'data');
var b = document.createElement('b');
shadowHost.appendChild(p);
shadowHost.appendChild(text);
shadowHost.appendChild(comment);
shadowHost.appendChild(processingInstruction);
shadowHost.appendChild(b);

var shadowRoot = shadowHost.attachShadow({mode: 'open'});

var firstSlotElement = document.createElement('slot');
shadowRoot.appendChild(firstSlotElement);

var secondSlotElement = document.createElement('slot');
shadowRoot.appendChild(secondSlotElement);

assert_array_equals(firstSlotElement.assignedNodes(options), [p, text, b],
'assignedNodes on a default slot must return the elements without slot attributes and text nodes');
assert_array_equals(secondSlotElement.assignedNodes(options), [],
'assignedNodes on the second unnamed slot element must return an empty array');

shadowRoot.removeChild(firstSlotElement);
assert_array_equals(firstSlotElement.assignedNodes(options), [],
'assignedNodes on a detached formerly-default slot must return an empty array');
assert_array_equals(secondSlotElement.assignedNodes(options), [p, text, b],
'assignedNodes on the second unnamed slot element after removing the first must return the elements without slot attributes and text nodes');

shadowRoot.removeChild(secondSlotElement);
shadowRoot.appendChild(secondSlotElement);
assert_array_equals(firstSlotElement.assignedNodes(options), [],
'Removing and re-inserting a default slot must not change the result of assignedNodes on a detached slot');
assert_array_equals(secondSlotElement.assignedNodes(options), [p, text, b],
'Removing and re-inserting a default slot must not change the result of assignedNodes');

shadowRoot.insertBefore(firstSlotElement, secondSlotElement);
assert_array_equals(firstSlotElement.assignedNodes(options), [p, text, b],
'assignedNodes on a newly inserted unnamed slot element must return the elements without slot attributes and text nodes');
assert_array_equals(secondSlotElement.assignedNodes(options), [],
'assignedNodes on formerly-first but now second unnamed slot element must return an empty array');

}, 'assignedNodes must update when slot elements are inserted or removed');
}

testInsertingAndRemovingSlots(null);
testInsertingAndRemovingSlots({flattened: false});
testInsertingAndRemovingSlots({flattened: true});

test(function () {
var outerHost = document.createElement('div');
var outerChild = document.createElement('span');
outerHost.appendChild(outerChild);

var outerShadow = outerHost.attachShadow({mode: 'closed'});
var innerHost = document.createElement('div');
var outerSlot = document.createElement('slot');
var innerChild = document.createElement('b');
outerShadow.appendChild(innerHost);
innerHost.appendChild(outerSlot);
innerHost.appendChild(innerChild);

var innerShadow = innerHost.attachShadow({mode: 'closed'});
var innerSlot = document.createElement('slot');
innerShadow.appendChild(innerSlot);

assert_array_equals(outerSlot.assignedNodes(), [outerChild], 'assignedNodes() on a default slot must return the assigned nodes');
assert_array_equals(outerSlot.assignedNodes({flatten: false}), [outerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
assert_array_equals(outerSlot.assignedNodes({flatten: true}), [outerChild], 'assignedNodes({flatten: true}) on a default slot must return the assigned nodes if they are not themselves slots');

assert_array_equals(innerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
assert_array_equals(innerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
assert_array_equals(innerSlot.assignedNodes({flatten: true}), [outerChild, innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

outerSlot.name = 'foo';
assert_array_equals(outerSlot.assignedNodes(), [], 'assignedNodes() on a named slot must return an empty array if there are no matching elements');
assert_array_equals(outerSlot.assignedNodes({flatten: false}), [], 'assignedNodes({flatten: false}) on a named slot must return an empty array if there are no matching elements');
assert_array_equals(outerSlot.assignedNodes({flatten: true}), [], 'assignedNodes({flatten: true}) on a named slot must return an empty array if there are no matching elements');

assert_array_equals(innerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
assert_array_equals(innerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
assert_array_equals(innerSlot.assignedNodes({flatten: true}), [innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

outerChild.slot = 'foo';
assert_array_equals(outerSlot.assignedNodes(), [outerChild], 'assignedNodes() on a named slot must return matching elements');
assert_array_equals(outerSlot.assignedNodes({flatten: false}), [outerChild], 'assignedNodes({flatten: false}) on a named slot must return matching elements');
assert_array_equals(outerSlot.assignedNodes({flatten: true}), [outerChild], 'assignedNodes({flatten: true}) on a named slot must return matching elements');

assert_array_equals(innerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
assert_array_equals(innerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
assert_array_equals(innerSlot.assignedNodes({flatten: true}), [outerChild, innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

var newInnerSlot = document.createElement('slot');
innerShadow.insertBefore(newInnerSlot, innerSlot);
assert_array_equals(newInnerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
assert_array_equals(newInnerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
assert_array_equals(newInnerSlot.assignedNodes({flatten: true}), [outerChild, innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

assert_array_equals(innerSlot.assignedNodes(), [], 'assignedNodes() on a nameless slot element which appears after a default slot must return an empty array');
assert_array_equals(innerSlot.assignedNodes({flatten: false}), [], 'assignedNodes({flatten: false}) on a nameless slot element which appears after a default slot must return an empty array');
assert_array_equals(innerSlot.assignedNodes({flatten: true}), [], 'assignedNodes({flatten: true}) on a nameless slot element which appears after a default slot must return an empty array');

innerShadow.removeChild(newInnerSlot);
assert_array_equals(newInnerSlot.assignedNodes(), [], 'assignedNodes() must return an empty array when the slot element is not in any tree');
assert_array_equals(newInnerSlot.assignedNodes({flatten: false}), [], 'assignedNodes({flatten: false}) must return an empty array when the slot element is not in any tree');
assert_array_equals(newInnerSlot.assignedNodes({flatten: true}), [], 'assignedNodes({flatten: true}) must return an empty array when the slot element is not in any tree');

assert_array_equals(innerSlot.assignedNodes(), [outerSlot, innerChild], 'assignedNodes() on a default slot must return the assigned nodes');
assert_array_equals(innerSlot.assignedNodes({flatten: false}), [outerSlot, innerChild], 'assignedNodes({flatten: false}) on a default slot must return the assigned nodes');
assert_array_equals(innerSlot.assignedNodes({flatten: true}), [outerChild, innerChild], 'assignedNodes({flatten: true}) on a default slot must return the distributed nodes');

}, 'assignedNodes({flatten: true}) must return the distributed nodes, and assignedNodes() and assignedNodes({flatten: false}) must returned the assigned nodes');

</script>
</body>
</html>

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