test_shadowroot_style.html

mozilla-central/dom/tests/mochitest/webcomponents/test_shadowroot_style.html

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Test Info:

Manifest: dom/tests/mochitest/webcomponents/mochitest.toml

<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=806506

-->

<head>

  <title>Test for ShadowRoot styling</title>

  <script type="text/javascript" src="head.js"></script>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=806506">Bug 806506</a>

<script>

SimpleTest.waitForExplicitFinish();

var content = '<div class="tall" id="bodydiv"></div>' +

              '<div id="container"></div>';

createIframe(content)

  .then((aDocument) => {

    var iframeWin = aDocument.defaultView;

    // Create ShadowRoot.

    var container = aDocument.getElementById("container");

    var elem = aDocument.createElement("div");

    container.appendChild(elem); // Put ShadowRoot host in document.

    var root = elem.attachShadow({mode: "open"});

    // A style element that will be appended into the ShadowRoot.

    var shadowStyle = aDocument.createElement("style");

    shadowStyle.innerHTML = ".tall { height: 100px; } .fat { padding-left: inherit; }";

    root.innerHTML = '<div id="divtostyle" class="tall fat"></div>';

    var divToStyle = root.getElementById("divtostyle");

    // Make sure styleSheet counts are correct after appending a style to the ShadowRoot.

    is(aDocument.styleSheets.length, 0, "There shouldn't be any style sheet in the test frame document.");

    is(root.styleSheets.length, 0, "The ShadowRoot should have no style sheets.");

    root.appendChild(shadowStyle);

    is(aDocument.styleSheets.length, 0, "Styles in the ShadowRoot element should not be accessible from the document.");

    is(root.styleSheets.length, 1, "ShadowRoot should have one style sheet from the appened style.");

    is(root.styleSheets[0].ownerNode, shadowStyle, "First style in ShadowRoot should match the style that was just appended.");

    var dummyStyle = aDocument.createElement("style");

    root.appendChild(dummyStyle);

    is(root.styleSheets.length, 2, "ShadowRoot should have an additional style from appending dummyStyle.");

    is(root.styleSheets[1].ownerNode, dummyStyle, "Second style in ShadowRoot should be the dummyStyle.");

    root.removeChild(dummyStyle);

    is(root.styleSheets.length, 1, "Removing dummyStyle should remove it from the ShadowRoot style sheets.");

    is(root.styleSheets[0].ownerNode, shadowStyle, "The style sheet remaining in the ShadowRoot should be shadowStyle.");

    // Make sure that elements outside of the ShadowRoot are not affected by the ShadowRoot style.

    isnot(iframeWin.getComputedStyle(aDocument.getElementById("bodydiv")).getPropertyValue("height"), "100px", "Style sheets in ShadowRoot should not apply to elements no in the ShadowRoot.");

    // Make sure that elements in the ShadowRoot are styled according to the ShadowRoot style.

    is(iframeWin.getComputedStyle(divToStyle).getPropertyValue("height"), "100px", "ShadowRoot style sheets should apply to elements in ShadowRoot.");

    // Tests for author styles not applying in a ShadowRoot.

    var authorStyle = aDocument.createElement("style");

    authorStyle.innerHTML = ".fat { padding-right: 20px; padding-left: 30px; }";

    aDocument.body.appendChild(authorStyle);

    isnot(iframeWin.getComputedStyle(divToStyle).getPropertyValue("padding-right"), "20px", "Author styles should not apply to ShadowRoot.");

    // Test dynamic changes to style in ShadowRoot.

    root.innerHTML = '<div id="divtostyle" class="dummy"></div>';

    divToStyle = root.getElementById("divtostyle");

    var dummyShadowStyle = aDocument.createElement("style");

    dummyShadowStyle.innerHTML = ".dummy { height: 300px; }";

    root.appendChild(dummyShadowStyle);

    is(iframeWin.getComputedStyle(divToStyle).getPropertyValue("height"), "300px", "Dummy element in ShadowRoot should be styled by style in ShadowRoot.");

    dummyShadowStyle.innerHTML = ".dummy { height: 200px; }";

    is(iframeWin.getComputedStyle(divToStyle).getPropertyValue("height"), "200px", "Dynamic changes to styles in ShadowRoot should change style of affected elements.");

    // Test id selector in ShadowRoot style.

    root.innerHTML = '<style>#divtostyle { padding-top: 10px; }</style><div id="divtostyle"></div>';

    divToStyle = root.getElementById("divtostyle");

    is(iframeWin.getComputedStyle(divToStyle).getPropertyValue("padding-top"), "10px", "ID selector in style selector should match element.");

    SimpleTest.finish();

});

</script>

</body>

</html>