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servo/tests/wpt/web-platform-tests/css/cssom-view/scroll-behavior-element.html

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<!DOCTYPE html>
<title>Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on an element</title>
<meta name="timeout" content="long"/>
<link rel="author" title="Frédéric Wang" href="mailto:fwang@igalia.com">
<link rel="help" href="https://drafts.csswg.org/cssom-view/#propdef-scroll-behavior">
<link rel="help" href="https://drafts.csswg.org/cssom-view/#scrolling-box">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/scroll-behavior.js"></script>
<style>
.scrollable {
overflow: auto;
width: 400px;
height: 200px;
}
.autoBehavior {
scroll-behavior: auto;
}
.smoothBehavior {
scroll-behavior: smooth;
}
</style>
<div id="log">
</div>
<div id="overflowNode" class="scrollable">
<div style="width: 2000px; height: 1000px; background: linear-gradient(135deg, red, green);">
<span style="display: inline-block; width: 500px; height: 250px;"></span><span id="elementToReveal" style="display: inline-block; vertical-align: -15px; width: 10px; height: 15px; background: black;"></span>
</div>
</div>
<script>
var scrollingElement = overflowNode;
var styledElement = overflowNode;
var elementToRevealLeft = 500;
var elementToRevealTop = 250;
["scroll", "scrollTo", "scrollBy", "scrollIntoView"].forEach((scrollFunction) => {
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "autoBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, scrollFunction, null, elementToRevealLeft, elementToRevealTop);
assert_equals(scrollingElement.scrollLeft, elementToRevealLeft, "Should set scrollLeft immediately");
assert_equals(scrollingElement.scrollTop, elementToRevealTop, "Should set scrollTop immediately");
return new Promise((resolve) => { resolve(); });
}, `Element with auto scroll-behavior ; ${scrollFunction}() with default behavior`);
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "autoBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, scrollFunction, "auto", elementToRevealLeft, elementToRevealTop);
assert_equals(scrollingElement.scrollLeft, elementToRevealLeft, "Should set scrollLeft immediately");
assert_equals(scrollingElement.scrollTop, elementToRevealTop, "Should set scrollTop immediately");
return new Promise((resolve) => { resolve(); });
}, `Element with auto scroll-behavior ; ${scrollFunction}() with auto behavior`);
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "autoBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, scrollFunction, "instant", elementToRevealLeft, elementToRevealTop);
assert_equals(scrollingElement.scrollLeft, elementToRevealLeft, "Should set scrollLeft immediately");
assert_equals(scrollingElement.scrollTop, elementToRevealTop, "Should set scrollTop immediately");
return new Promise((resolve) => { resolve(); });
}, `Element with auto scroll-behavior ; ${scrollFunction}() with instant behavior`);
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "autoBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, scrollFunction, "smooth", elementToRevealLeft, elementToRevealTop);
assert_less_than(scrollingElement.scrollLeft, elementToRevealLeft, "Should not set scrollLeft immediately");
assert_less_than(scrollingElement.scrollTop, elementToRevealTop, "Should not set scrollTop immediately");
return waitForScrollEnd(scrollingElement).then(() => {
assert_equals(scrollingElement.scrollLeft, elementToRevealLeft, "Final value of scrollLeft");
assert_equals(scrollingElement.scrollTop, elementToRevealTop, "Final value of scrollTop");
});
}, `Element with auto scroll-behavior ; ${scrollFunction}() with smooth behavior`);
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "smoothBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, scrollFunction, null, elementToRevealLeft, elementToRevealTop);
assert_less_than(scrollingElement.scrollLeft, elementToRevealLeft, "Should not set scrollLeft immediately");
assert_less_than(scrollingElement.scrollTop, elementToRevealTop, "Should not set scrollTop immediately");
return waitForScrollEnd(scrollingElement).then(() => {
assert_equals(scrollingElement.scrollLeft, elementToRevealLeft, "Final value of scrollLeft");
assert_equals(scrollingElement.scrollTop, elementToRevealTop, "Final value of scrollTop");
});
}, `Element with smooth scroll-behavior ; ${scrollFunction}() with default behavior`);
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "smoothBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, scrollFunction, "auto", elementToRevealLeft, elementToRevealTop);
assert_less_than(scrollingElement.scrollLeft, elementToRevealLeft, "Should not set scrollLeft immediately");
assert_less_than(scrollingElement.scrollTop, elementToRevealTop, "Should not set scrollTop immediately");
return waitForScrollEnd(scrollingElement).then(() => {
assert_equals(scrollingElement.scrollLeft, elementToRevealLeft, "Final value of scrollLeft");
assert_equals(scrollingElement.scrollTop, elementToRevealTop, "Final value of scrollTop");
});
}, `Element with smooth scroll-behavior ; ${scrollFunction}() with auto behavior`);
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "smoothBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, scrollFunction, "instant", elementToRevealLeft, elementToRevealTop);
assert_equals(scrollingElement.scrollLeft, elementToRevealLeft, "Should set scrollLeft immediately");
assert_equals(scrollingElement.scrollTop, elementToRevealTop, "Should set scrollTop immediately");
return new Promise((resolve) => { resolve(); });
}, `Element with smooth scroll-behavior ; ${scrollFunction}() with instant behavior`);
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "smoothBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, scrollFunction, "smooth", elementToRevealLeft, elementToRevealTop);
assert_less_than(scrollingElement.scrollLeft, elementToRevealLeft, "Should not set scrollLeft immediately");
assert_less_than(scrollingElement.scrollTop, elementToRevealTop, "Should not set scrollTop immediately");
return waitForScrollEnd(scrollingElement).then(() => {
assert_equals(scrollingElement.scrollLeft, elementToRevealLeft, "Final value of scrollLeft");
assert_equals(scrollingElement.scrollTop, elementToRevealTop, "Final value of scrollTop");
});
}, `Element with smooth scroll-behavior ; ${scrollFunction}() with smooth behavior`);
});
[{scrollAttribute: "scrollLeft", scrollValue: elementToRevealLeft}, {scrollAttribute: "scrollTop", scrollValue: elementToRevealTop}].forEach((attributeTest) => {
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "autoBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
var expectedValue = Number(attributeTest.scrollValue);
scrollingElement[attributeTest.scrollAttribute] = expectedValue;
assert_equals( scrollingElement[attributeTest.scrollAttribute], expectedValue, "Should set scroll attribute immediately");
return new Promise((resolve) => { resolve(); });
}, `Set ${attributeTest.scrollAttribute} to element with auto scroll-behavior`);
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "smoothBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
var expectedValue = Number(attributeTest.scrollValue);
scrollingElement[attributeTest.scrollAttribute] = expectedValue;
assert_less_than(scrollingElement[attributeTest.scrollAttribute], expectedValue, "Shouldn't set scroll attribute immediately");
return waitForScrollEnd(scrollingElement).then(() => {
assert_equals(scrollingElement[attributeTest.scrollAttribute], expectedValue, "Final value of scroll attribute");
});
}, `Set ${attributeTest.scrollAttribute} to element with smooth scroll-behavior`);
});
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "smoothBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, "scroll", "smooth", elementToRevealLeft, elementToRevealTop);
scrollNode(scrollingElement, "scroll", "smooth", elementToRevealLeft / 2, elementToRevealTop / 2);
return waitForScrollEnd(scrollingElement).then(() => {
assert_equals(scrollingElement.scrollLeft, elementToRevealLeft / 2, "Final value of scrollLeft");
assert_equals(scrollingElement.scrollTop, elementToRevealTop / 2, "Final value of scrollTop");
});
}, "Aborting an ongoing smooth scrolling on an element with another smooth scrolling");
promise_test(() => {
resetScroll(scrollingElement);
setScrollBehavior(styledElement, "smoothBehavior");
assert_equals(scrollingElement.scrollLeft, 0);
assert_equals(scrollingElement.scrollTop, 0);
scrollNode(scrollingElement, "scroll", "smooth", elementToRevealLeft, elementToRevealTop);
scrollNode(scrollingElement, "scroll", "instant", 0, 0);
return waitForScrollEnd(scrollingElement).then(() => {
assert_equals(scrollingElement.scrollLeft, 0, "Final value of scrollLeft");
assert_equals(scrollingElement.scrollTop, 0, "Final value of scrollTop");
});
}, "Aborting an ongoing smooth scrolling on an element with an instant scrolling");
</script>
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