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Meta-test on computed value of calc functions inside *-gradient funct…
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css/css-values/calc-linear-radial-conic-gradient-001.html
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<!DOCTYPE html> | ||
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<meta charset="UTF-8"> | ||
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<title>CSS Values and Units Test: computed value of 'background-image: [ linear | radial | conic ]-gradient()' with calc() function</title> | ||
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<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/"> | ||
<link rel="help" href="https://www.w3.org/TR/css-values-3/#calc-computed-value"> | ||
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<meta name="flags" content=""> | ||
<meta content="This test verifies how calc() functions inside 6 linear-gradient(), 1 radial-gradient() and 1 conic-gradient() are computed for 'background-image'." name="assert"> | ||
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<!-- | ||
Blink (Chromium) Bug report 947377: [css-values-3] Values inside <image>s are not computed correctly / reflected correctly from getComputedStyle | ||
https://bugs.chromium.org/p/chromium/issues/detail?id=947377 | ||
WebKit (Safari) Bug report 196389: [css-values-3] Computed value of calc() expression in linear-gradient function incorrect | ||
https://bugs.webkit.org/show_bug.cgi?id=196389 | ||
--> | ||
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<style> | ||
div#target | ||
{ | ||
background-image: linear-gradient(yellow, red); | ||
height: 100px; | ||
} | ||
</style> | ||
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<script src="/resources/testharness.js"></script> | ||
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<script src="/resources/testharnessreport.js"></script> | ||
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<div id="target"></div> | ||
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<script> | ||
function startTesting() | ||
{ | ||
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var targetElement = document.getElementById("target"); | ||
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function verifyComputedStyle(property_name, specified_value, expected_value, description) | ||
{ | ||
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test(function() | ||
{ | ||
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targetElement.style.setProperty(property_name, "initial"); | ||
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/* | ||
The purpose of setting to the initial is to act as a fallback | ||
value in case the calc() function in the specified value | ||
fails or in case it generates an invalid value. Since we | ||
are running 6 consecutive tests on the same element, | ||
then it is necessary to 'reset' its property to the | ||
initial value. | ||
*/ | ||
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targetElement.style.setProperty(property_name, specified_value); | ||
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assert_equals(getComputedStyle(targetElement)[property_name], expected_value); | ||
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}, description); | ||
} | ||
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/* verifyComputedStyle(property_name, specified_value, expected_value, description) */ | ||
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/* LINEAR */ | ||
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verifyComputedStyle( | ||
"background-image", | ||
"linear-gradient(rgb(0, 128, 0) calc(0%), rgb(0, 0, 255))", | ||
"linear-gradient(rgb(0, 128, 0) 0%, rgb(0, 0, 255))", | ||
"testing background-image: linear-gradient(rgb(0, 128, 0) calc(0%), rgb(0, 0, 255))"); | ||
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verifyComputedStyle( | ||
"background-image", | ||
"linear-gradient(calc(90deg), rgb(0, 128, 0), rgb(0, 0, 255))", | ||
"linear-gradient(90deg, rgb(0, 128, 0), rgb(0, 0, 255))", | ||
"testing background-image: linear-gradient(calc(90deg), rgb(0, 128, 0), rgb(0, 0, 255))"); | ||
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verifyComputedStyle( | ||
"background-image", | ||
"linear-gradient(calc(90deg), rgb(0, 128, 0) calc(0%), rgb(0, 0, 255))", | ||
"linear-gradient(90deg, rgb(0, 128, 0) 0%, rgb(0, 0, 255))", | ||
"testing background-position: linear-gradient(calc(90deg), rgb(0, 128, 0) calc(0%), rgb(0, 0, 255))"); | ||
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verifyComputedStyle( | ||
"background-image", | ||
"linear-gradient(calc(0.1turn + 0.15turn), rgb(0, 128, 0), rgb(0, 0, 255))", | ||
"linear-gradient(90deg, rgb(0, 128, 0), rgb(0, 0, 255))", | ||
"testing background-image: linear-gradient(calc(0.1turn + 0.15turn), rgb(0, 128, 0), rgb(0, 0, 255))"); | ||
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verifyComputedStyle( | ||
"background-image", | ||
"linear-gradient(calc(150grad - 50grad), rgb(0, 128, 0), rgb(0, 0, 255))", | ||
"linear-gradient(90deg, rgb(0, 128, 0), rgb(0, 0, 255))", | ||
"testing background-image: linear-gradient(calc(150grad - 50grad), rgb(0, 128, 0), rgb(0, 0, 255))"); | ||
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verifyComputedStyle( | ||
"background-image", | ||
"linear-gradient(calc(200grad - 90deg), rgb(0, 128, 0), rgb(0, 0, 255))", | ||
"linear-gradient(90deg, rgb(0, 128, 0), rgb(0, 0, 255))", | ||
"testing background-image: linear-gradient(calc(200grad - 90deg), rgb(0, 128, 0), rgb(0, 0, 255))"); | ||
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/* RADIAL */ | ||
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verifyComputedStyle( | ||
"background-image", | ||
"radial-gradient(rgb(0, 128, 0) calc(10% + 20%), rgb(0, 0, 255) calc(30% + 40%))", | ||
"radial-gradient(rgb(0, 128, 0) 30%, rgb(0, 0, 255) 70%)", | ||
"testing background-image: radial-gradient(rgb(0, 128, 0) calc(10% + 20%), rgb(0, 0, 255) calc(30% + 40%))"); | ||
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/* CONIC */ | ||
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verifyComputedStyle( | ||
"background-image", | ||
"conic-gradient(rgb(0, 128, 0) calc(50% + 10%), rgb(0, 0, 255) calc(60% + 20%))", | ||
"conic-gradient(rgb(0, 128, 0) 60%, rgb(0, 0, 255) 80%)", | ||
"testing background-image: conic-gradient(rgb(0, 128, 0) calc(50% + 10%), rgb(0, 0, 255) calc(60% + 20%))"); | ||
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/* verifyComputedStyle(property_name, specified_value, expected_value, description) */ | ||
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} | ||
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startTesting(); | ||
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</script> |