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see #10947 Node::scroll_area should check if the element is potentially scrollable Three tests use `document.scrollingElement` which was not supported at the time of writing. They are, hence, expected to FAIL. The last expected FAIL should be fixed by #10947. Edited some comments, message texts.
143 lines
6.2 KiB
HTML
143 lines
6.2 KiB
HTML
<html>
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<script src="/resources/testharness.js" type="text/javascript"></script>
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<script src="/resources/testharnessreport.js" type="text/javascript"></script>
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<style type="text/css">
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body {
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border:1px solid black;
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width:200px;
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height:40px;
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padding-bottom:50px;
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padding-right:40px;
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}
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#elemSimple {
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background:yellow;
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width:60px;
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height:30px;
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}
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#elemOverflow {
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background:yellow;
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width:250px;
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height:150px;
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}
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</style>
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<body id="thebody">
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<div id="thediv"></div>
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</body>
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<script>
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// Testing for html body element's scroll- x, y, width, height behaviour in quirks mode
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// https://drafts.csswg.org/cssom-view/#potentially-scrollable
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// https://drafts.csswg.org/cssom-view/#dom-element-scrollheight
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test(function() {
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// can i get the div element?
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var thediv = document.getElementById("thediv");
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assert_equals(thediv.id, "thediv");
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// can i get the body element?
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var thebody = document.getElementById("thebody");
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assert_equals(thebody.id, "thebody");
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}, "Ensure that body element is loaded.")
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test(function() {
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document.body.style.overflowY = "hidden";
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assert_equals(document.body.style.overflowY, "hidden", "Could not set document.body.style.overflowY to 'hidden'.");
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document.body.style.overflowY = "scroll";
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assert_equals(document.body.style.overflowY, "scroll", "Could not set document.body.style.overflowY to 'scroll'.");
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document.documentElement.style.overflowY = "scroll";
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assert_equals(document.documentElement.style.overflowY, "scroll", "Could not set document.documentElement.style.overflow to 'scroll'.");
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}, "Ensure that style.overflowY can be set properly.")
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test(function() {
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assert_equals(document.compatMode, "BackCompat", "Should be in quirks mode.");
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}, "document.compatMode should be BackCompat in quirks.")
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test(function() {
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var thebody = document.getElementById("thebody");
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assert_equals(thebody.id, "thebody");
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assert_equals(document.scrollingElement, thebody,
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"scrollingElement in quirks mode should default to body element.");
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}, "document.scrollingElement should be body element in quirks.")
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test(function() {
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document.documentElement.style.overflowY = "scroll";
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assert_equals(document.documentElement.style.overflowY, "scroll", "Could not set document.documentElement.style.overflowY to 'scroll'.");
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var thebody = document.getElementById("thebody");
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assert_equals(thebody.id, "thebody");
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thebody.style.overflowY="scroll";
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assert_equals(document.body.style.overflowY, "scroll", "Could not set document.body.style.overflowY to 'scroll'.");
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// Body and document now both have overflow != visible
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// => body `potentially scrollable`
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// In quirks, when body is not `potentially scrollable`
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// document.scrollingElment returns the body, otherwise null
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// https://drafts.csswg.org/cssom-view/#dom-document-scrollingelement
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assert_equals(document.scrollingElement, null,
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"In quirks, we would expect null here (because of potentially scrollable body)");
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}, "scrollingElement in quirks should be null when body is potentially scrollable.")
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test(function() {
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document.documentElement.style.overflowY = "visible";
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assert_equals(document.documentElement.style.overflowY, "visible");
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assert_equals(document.scrollingElement, document.body);
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document.documentElement.style.overflowY = "scroll";
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assert_equals(document.documentElement.style.overflowY, "scroll");
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document.body.style.overflowY = "visible";
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assert_equals(document.body.style.overflowY, "visible");
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assert_equals(document.scrollingElement, document.body);
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document.documentElement.style.overflowY = "visible";
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assert_equals(document.documentElement.style.overflowY, "visible");
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assert_equals(document.scrollingElement, document.body);
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}, "scrollingElement in quirks should be body if any of document and body has a visible overflow.")
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// no overflow property set to `visible` => pot. scrollable
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test(function() {
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document.body.style.overflowY = "scroll";
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assert_equals(document.body.style.overflowY, "scroll");
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document.documentElement.style.overflowY = "scroll";
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assert_equals(document.documentElement.style.overflowY, "scroll");
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assert_greater_than(window.innerHeight, 400, "Window not large enough for valid test run.");
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assert_not_equals(document.body.scrollHeight, window.innerHeight);
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var elem = document.getElementById("thediv");
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elem.style.height = "170px";
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assert_equals(elem.style.height, "170px");
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oldScrollHeight = document.body.scrollHeight;
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elem.style.height = "190px";
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assert_equals(elem.style.height, "190px");
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assert_equals(document.body.scrollHeight, oldScrollHeight+20);
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}, "When body potentially scrollable, document.body.scrollHeight changes when changing the height of the body content in quirks.")
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// any use of `visible` => not potentially scrollable
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function testNotPotScrollable (document_overflow, body_overflow) {
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document.body.style.overflowY = body_overflow;
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assert_equals(document.body.style.overflowY, body_overflow);
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document.documentElement.style.overflowY = document_overflow;
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assert_equals(document.documentElement.style.overflowY, document_overflow);
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assert_greater_than(window.innerHeight, 400, "Window not large enough for valid test run.");
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assert_equals(document.body.scrollHeight, window.innerHeight);
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var elem = document.getElementById("thediv");
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elem.style.height = "170px";
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assert_equals(elem.style.height, "170px");
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assert_equals(window.innerHeight, document.body.scrollHeight);
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oldScrollHeight = document.body.scrollHeight;
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elem.style.height = "190px";
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assert_equals(elem.style.height, "190px");
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assert_equals(window.innerHeight, document.body.scrollHeight);
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assert_equals(document.body.scrollHeight, oldScrollHeight);
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}
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tests = [["visible", "scroll"], ["scroll", "visible"], ["visible", "visible"]];
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for (var i = 0; i < tests.length; i++) {
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test( function () {
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testNotPotScrollable (tests[i][0], tests[i][1]);
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}, "When body not potentially scrollable, document.body.scrollHeight always equals window.innerHeight in quirks. (cond. "+tests[i][0]+", "+tests[i][1]+")")
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}
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</script>
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</html>
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