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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
| commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
| tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /testing/web-platform/mozilla/tests/css/css-overflow/scrollbar-gutter-reflow-counts-001.html | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/mozilla/tests/css/css-overflow/scrollbar-gutter-reflow-counts-001.html')
| -rw-r--r-- | testing/web-platform/mozilla/tests/css/css-overflow/scrollbar-gutter-reflow-counts-001.html | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/testing/web-platform/mozilla/tests/css/css-overflow/scrollbar-gutter-reflow-counts-001.html b/testing/web-platform/mozilla/tests/css/css-overflow/scrollbar-gutter-reflow-counts-001.html new file mode 100644 index 0000000000..aa4ed4667b --- /dev/null +++ b/testing/web-platform/mozilla/tests/css/css-overflow/scrollbar-gutter-reflow-counts-001.html @@ -0,0 +1,115 @@ +<!DOCTYPE html> +<html> + <meta charset="utf-8"> + <title>CSS Overflow: Test scrollbar-gutter reflow counts</title> + <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com"> + <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1746098"> + + <script src="/resources/testharness.js"></script> + <script src="/resources/testharnessreport.js"></script> + + <style> + #target { + inline-size: 200px; + block-size: 100px; + background: lightgray; + overflow: auto; + } + + #targetChild { + inline-size: 100%; + block-size: 100%; + background: orange; + } + </style> + + <p>Here is a scroll contaier for testing:</p> + <div id="target"> + <div id="targetChild"></div> + </div> + + <script> + let gUtils = SpecialPowers.getDOMWindowUtils(window); + let gTarget = document.getElementById("target"); + let gTargetChild = document.getElementById("targetChild"); + + function getReflowCount() + { + document.documentElement.offsetHeight; // flush layout + return gUtils.framesReflowed; + } + + function cleanUp() { + gTarget.style.writingMode = ""; + gTarget.style.scrollbarGutter = ""; + gTargetChild.style.blockSize = ""; + } + + function tweakStyleAndCountReflows(aAddStyle, aAddScrollbarGutter) + { + let beforeCount = getReflowCount(); + if (aAddScrollbarGutter) { + gTarget.style.scrollbarGutter = "stable"; + } + aAddStyle(); + let afterCount = getReflowCount(); + cleanUp(); + + let numReflows = afterCount - beforeCount; + assert_greater_than(numReflows, 0, "We should've reflowed *something* after changing styles:"); + return numReflows; + } + + let gTestCases = [ + { + name : "Enlarge the child's block-size to 200%", + addStyle : function () { + gTargetChild.style.blockSize = "200%"; + }, + }, + { + name : "Enlarge the child's block-size to 300px", + addStyle : function () { + gTargetChild.style.blockSize = "300px"; + }, + }, + { + name : "Enlarge the child's block-size to 200% in a vertical-lr scroll container", + addStyle : function () { + gTarget.style.writingMode = "vertical-lr"; + gTargetChild.style.blockSize = "200%"; + }, + }, + { + name : "Enlarge the child's block-size to 300px in a vertical-lr scroll container", + addStyle : function () { + gTarget.style.writingMode = "vertical-lr"; + gTargetChild.style.blockSize = "300px"; + }, + }, + { + name : "Enlarge the child's block-size to 200% in a vertical-rl scroll container", + addStyle : function () { + gTarget.style.writingMode = "vertical-rl"; + gTargetChild.style.blockSize = "200%"; + }, + }, + { + name : "Enlarge the child's block-size to 300px in a vertical-rl scroll container", + addStyle : function () { + gTarget.style.writingMode = "vertical-rl"; + gTargetChild.style.blockSize = "300px"; + }, + }, + ]; + + for (let testcase of gTestCases) { + test(function () { + let numTestReflows = tweakStyleAndCountReflows(testcase.addStyle, true); + let numReferenceReflows = tweakStyleAndCountReflows(testcase.addStyle, false); + assert_less_than(numTestReflows, numReferenceReflows, + "A scroll container with 'scrollbar-gutter:stable' should have less reflow counts:"); + }, testcase.name) + } + </script> +</html> |