third_party/WebKit/LayoutTests/fast/dom/root-client-size-iframe.html - Issue 1935043002: Avoid style recalc and layout when not necessary for client size.

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Unified Diff: third_party/WebKit/LayoutTests/fast/dom/root-client-size-iframe.html

Issue 1935043002: Avoid style recalc and layout when not necessary for client size. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Skip layout for local frame roots only Created 4 years, 8 months ago

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Index: third_party/WebKit/LayoutTests/fast/dom/root-client-size-iframe.html

diff --git a/third_party/WebKit/LayoutTests/fast/dom/root-client-size-iframe.html b/third_party/WebKit/LayoutTests/fast/dom/root-client-size-iframe.html

new file mode 100644

index 0000000000000000000000000000000000000000..acca19817f523eaf9841bbb87bded5a472388d4f

--- /dev/null

+++ b/third_party/WebKit/LayoutTests/fast/dom/root-client-size-iframe.html

@@ -0,0 +1,30 @@

+<!DOCTYPE html>

+<script src="../../resources/js-test.js"></script>

+<style>

+ iframe { width: 100px; height: 100px; }

+ iframe.wider { width: 200px; }

+</style>

+<iframe id="frame" src="data:text/html,<!DOCTYPE html>iframe" onload="runTests()"></iframe>

+<script>

+ description("Style recalc/layout when reading clientWidth of documentElement in iframe.");

+ var jsTestIsAsync = true;

+ shouldBeDefined(window.internals);

+ var originalOverlayScrollbars = internals.runtimeFlags.overlayScrollbarsEnabled;

+ internals.settings.setOverlayScrollbarsEnabled(true);

+ function runTests() {

+ clientWidthBefore = frame.contentDocument.documentElement.clientWidth;

+ frame.className = "wider";

+ clientWidthAfter = frame.contentDocument.documentElement.clientWidth;

+ shouldBe("internals.updateStyleAndReturnAffectedElementCount()", "0");

+ shouldBe("clientWidthBefore", "100");

+ shouldBe("clientWidthAfter", "200");

+ internals.settings.setOverlayScrollbarsEnabled(originalOverlayScrollbars);

+ finishJSTest();

+ }

+</script>