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CSS Grid Layout Test: Flooring of repeating track sizes to nonzero values #56948

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CSS Grid Layout Test: Flooring of repeating track sizes to nonzero values #56948

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61 changes: 61 additions & 0 deletions css/css-grid/grid-definition/grid-template-columns-rows-resolved-values-002.html
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<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Flooring of repeating track sizes to nonzero values</title>
<link rel="author" title="Sean Lauritzen" href="mailto:[email protected]">
<link rel="help" href="https://www.w3.org/TR/css-grid-1/#auto-repeat">
<meta name="assert" content="This test checks that the grid `repeat()` notation floors track sizes to a positive nonzero value (nominally 1px) for the purpose of finding the number of auto-repeated tracks.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#test-1 {
width: 60px;
display: grid;
grid-template-columns: repeat(auto-fit, 0);
}
#test-2 {
width: 60px;
display: grid;
grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
}
#test-3 {
height: 60px;
display: grid;
grid-template-rows: repeat(auto-fill, minmax(0, 0));
}
</style>
<p>These tests make sure that <code>repeat(auto-fill|auto-fit, ...)</code> floors zero-sized tracks for track count calculations.</p>
<p>Subtest 1: <code>repeat(auto-fit, 0)</code></p>
<div id="test-1"></div>
<p>Subtest 2: <code>repeat(auto-fit, minmax(0, 1fr))</code></p>
<div id="test-2">
<div style="background: red;">.</div>
<div style="background: lime;">.</div>
<div style="background: blue;">.</div>
</div>
<p>Subtest 3: <code>repeat(auto-fill, minmax(0, 0))</code></p>
<div id="test-3"></div>
<script>
var test1 = document.getElementById("test-1");
test(
() => {
assert_greater_than(window.getComputedStyle(test1)["grid-template-columns"].split("0px").length - 1, 1);
},
"Subtest #1: Check for at least two zero-sized tracks"
);
var test2 = document.getElementById("test-2");
test(
() => {
assert_equals(window.getComputedStyle(test2)["grid-template-columns"].split("20px").length - 1, 3);
},
"Subtest #2: Check for three tracks 20px each"
);
var test3 = document.getElementById("test-3");
test(
() => {
assert_greater_than(window.getComputedStyle(test3)["grid-template-rows"].split("0px").length - 1, 1);
},
"Subtest #3: Check for at least two zero-sized tracks"
);
</script>
</html>