<!DOCTYPE HTML>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>

<div class="container">
    <div id="div">Div Contents</div>
</div>

<script>
test(function(t){
    var axDiv = accessibilityController.accessibleElementById("div");
    assert_equals(axDiv.name, "");
}, "A simple div with inner text should not have an accessible name.");
</script>

<div class="container">
    <button id="self">Contents of button</button>
</div>

<script>
test(function(t){
    var axSelf = accessibilityController.accessibleElementById("self");
    assert_equals(axSelf.name, "Contents of button");
    assert_equals(axSelf.nameFrom, "contents");
}, "A button's accessible name should come from its contents.");
</script>

<div class="container">
    <button id="labelledby" aria-labelledby="label1">Contents</button>
    <div id="label1">Label 1</div>
</div>

<script>
test(function(t){
    var axLabelledby = accessibilityController.accessibleElementById("labelledby");
    assert_equals(axLabelledby.name, "Label 1");
    assert_equals(axLabelledby.nameFrom, "relatedElement");
    assert_equals(axLabelledby.nameElementCount(), 1);
    assert_equals(axLabelledby.nameElementAtIndex(0).role, "AXRole: AXGenericContainer");
}, "Button with aria-labelledby referencing the id of another element.");
</script>

<div class="container">
    <button id="labelledby2" aria-labelledby="labelledby2">Contents</button>
</div>

<script>
test(function(t){
    var axLabelledby2 = accessibilityController.accessibleElementById("labelledby2");
    assert_equals(axLabelledby2.name, "Contents");
    assert_equals(axLabelledby2.nameFrom, "relatedElement");
    assert_equals(axLabelledby2.nameElementCount(), 1);
    assert_equals(axLabelledby2.nameElementAtIndex(0).role, "AXRole: AXButton");
}, "Button with aria-labelledby referencing itself.");
</script>

<div class="container">
    <button id="labelledby3" aria-labelledby="labelledby3 label3">Contents</button>
    <div id="label3">Label 3</div>
</div>

<script>
test(function(t){
    var axLabelledby3 = accessibilityController.accessibleElementById("labelledby3");
    assert_equals(axLabelledby3.name, "Contents Label 3");
    assert_equals(axLabelledby3.nameFrom, "relatedElement");
    assert_equals(axLabelledby3.nameElementCount(), 2);
    assert_equals(axLabelledby3.nameElementAtIndex(0).role, "AXRole: AXButton");
    assert_equals(axLabelledby3.nameElementAtIndex(1).role, "AXRole: AXGenericContainer");
}, "Button with aria-labelledby referencing itself and the id of another element.");
</script>

<div class="container">
    <button id="labelledby4" aria-labelledby="label4">Contents</button>
    <div id="label4" aria-labelledby="label4chained">Contents 4</div>
    <p id="label4chained">Contents 4 chained</p>
</div>

<script>
test(function(t){
    var axLabelledby4 = accessibilityController.accessibleElementById("labelledby4");
    assert_equals(axLabelledby4.name, "Contents 4");
    assert_equals(axLabelledby4.nameFrom, "relatedElement");
    assert_equals(axLabelledby4.nameElementCount(), 1);
    assert_equals(axLabelledby4.nameElementAtIndex(0).role, "AXRole: AXGenericContainer");
}, "Button with chain of aria-labelledby references.");
</script>

<div class="container">
    <button id="labelledby5" aria-labelledby="label5">Contents</button>
</div>

<script>
test(function(t){
    var axLabelledby5 = accessibilityController.accessibleElementById("labelledby5");
    assert_equals(axLabelledby5.name, "Contents");
    assert_equals(axLabelledby5.nameFrom, "contents");
    assert_equals(axLabelledby5.nameElementCount(), 0);
}, "aria-labelledby reference to nonexistant element.");
</script>

<div class="container">
    <button id="labelledby6" aria-labelledby="label6">Contents</button>
    <div id="label6"></div>
</div>

<script>
test(function(t){
    var axLabelledby6 = accessibilityController.accessibleElementById("labelledby6");
    assert_equals(axLabelledby6.name, "");
    assert_equals(axLabelledby6.nameFrom, "relatedElement");
    assert_equals(axLabelledby6.nameElementCount(), 1);
    assert_equals(axLabelledby6.nameElementAtIndex(0).role, "AXRole: AXGenericContainer");
}, "aria-labelledby reference to element with no text.");
</script>

<div class="container">
    <button id="labelledby7" aria-labelledby="label7">Contents</button>
    <h3 id="label7" style="visibility: hidden">Invisible label</h3>
</div>

<script>
test(function(t){
    assert_true(accessibilityController.accessibleElementById("label7").isIgnored);
    var axLabelledby7 = accessibilityController.accessibleElementById("labelledby7");
    assert_equals(axLabelledby7.name, "Invisible label");
    assert_equals(axLabelledby7.nameFrom, "relatedElement");
    assert_equals(axLabelledby7.nameElementCount(), 1);
    assert_equals(axLabelledby7.nameElementAtIndex(0).role, "AXRole: AXHeading");
}, "Button with aria-labelledby reference to invisible element.");
</script>

<div class="container">
    <button id="labelledby8" aria-labelledby="label8">Contents</button>
    <h3 id="label8" style="display: none">Display-none label</h3>
</div>

<script>
test(function(t){
    assert_equals(accessibilityController.accessibleElementById("label8"), undefined);
    var axLabelledby8 = accessibilityController.accessibleElementById("labelledby8");
    assert_equals(axLabelledby8.name, "Display-none label");
    assert_equals(axLabelledby8.nameFrom, "relatedElement");
    assert_equals(axLabelledby8.nameElementCount(), 1);
    assert_equals(axLabelledby8.nameElementAtIndex(0).role, "AXRole: AXHeading");
}, "Button with aria-labelledby reference to display-none element.");
</script>