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chromium/third_party/blink/web_tests/external/wpt/css/css-grid/grid-definition/flex-content-resolution-rows-001.html 

<!DOCTYPE html>
<html>
<title>CSS Grid Layout Test: Auto repeat tracks, grid-template-rows and flexible lengths.</title>
<link rel="author" title="Julien Chaffraix" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-grid-1/#track-sizes">
<link rel="help" href="https://drafts.csswg.org/css-grid-1/#fr-unit">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=235258">
<link rel="stylesheet" href="/fonts/ahem.css">
<link rel="stylesheet" href="/css/support/grid.css">
<meta name="assert" content="Test that resolving auto tracks on grid items using <flex> values with grid-template-rows works properly." />

<style>
.gridFlexContent {
    grid-template-columns: 50px;
    grid-template-rows: 1fr 1fr;
}
.gridMaxFlexContent {
    grid-template-columns: 50px;
    grid-template-rows: minmax(30px, 2fr);
}
.gridTwoMaxFlexContent {
    grid-template-columns: 50px;
    grid-template-rows: minmax(10px, 1fr) minmax(10px, 2fr);
}
.gridTwoDoubleMaxFlexContent {
    grid-template-columns: 50px;
    grid-template-rows: minmax(10px, 0.5fr) minmax(10px, 2fr);
}
.gridRespectBaseSize {
    grid-template-columns: 50px;
    grid-template-rows: minmax(75px, 1fr) minmax(0px, 2fr);
}
.gridRespectProportions {
    grid-template-columns: 50px;
    grid-template-rows: minmax(25px, .25fr) minmax(0px, .5fr) minmax(0px, 2fr);
}
.gridRespectBaseSizeProportions {
    grid-template-columns: 50px;
    grid-template-rows: minmax(50px, .25fr) minmax(0px, .5fr) minmax(0px, 1fr);
}
.gridRespectBaseSizeBeforeProportions {
    grid-template-columns: 50px;
    grid-template-rows: minmax(50px, .25fr) minmax(0px, .5fr) minmax(0px, 1fr);
}
.thirdRowFirstColumn {
    background-color: yellow;
    grid-column: 1;
    grid-row: 3;
}
</style>

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script type="text/javascript">
  setup({ explicit_done: true });
</script>

<body onload="document.fonts.ready.then(() => { checkLayout('.grid'); })">

<div class="grid gridFlexContent constrainedContainer" style="position: relative;">
    <div class="sizedToGridArea firstRowFirstColumn" data-offset-x="0" data-offset-y="0" data-expected-width="50" data-expected-height="30">X<br>X<br>X</div>
    <div class="sizedToGridArea secondRowFirstColumn" data-offset-x="0" data-offset-y="30" data-expected-width="50" data-expected-height="50">X<br>X<br>X<br>X<br>X</div>
</div>

<div class="constrainedContainer">
    <div class="grid gridMaxFlexContent">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="30"></div>
    </div>
</div>

<!-- Allow the extra logical space distribution to occur. -->
<div style="width: 10px; height: 40px">
    <div class="grid gridMaxFlexContent" style="height: 100%;">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="40"></div>
    </div>
</div>

<div style="width: 10px; height: 40px">
    <div class="grid gridMaxFlexContent">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="30"></div>
    </div>
</div>

<div style="width: 10px; height: 100px;">
    <div class="grid gridMaxFlexContent" style="height: 100%;">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="100"></div>
    </div>
</div>

<div style="width: 10px; height: 100px;">
    <div class="grid gridMaxFlexContent">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="30"></div>
    </div>
</div>

<div class="constrainedContainer">
    <div class="grid gridTwoMaxFlexContent" style="height: 100%">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
    </div>
</div>

<div class="constrainedContainer">
    <div class="grid gridTwoMaxFlexContent">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="20"></div>
    </div>
</div>

<!-- Allow the extra logical space distribution to occur. -->
<div style="width: 10px; height: 60px">
    <div class="grid gridTwoMaxFlexContent" style="height: 100%">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="20"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="40"></div>
    </div>
</div>

<div style="width: 10px; height: 60px">
    <div class="grid gridTwoMaxFlexContent">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="20"></div>
    </div>
</div>

<div style="width: 10px; height: 120px;">
    <div class="grid gridTwoMaxFlexContent" style="height: 100%">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="40"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="80"></div>
    </div>
</div>

<div style="width: 10px; height: 120px;">
    <div class="grid gridTwoMaxFlexContent">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="20"></div>
    </div>
</div>

<div class="constrainedContainer">
    <div class="grid gridTwoDoubleMaxFlexContent" style="height: 100%">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
    </div>
</div>

<!-- We normalize fraction flex factors to 1, so we don't keep exact proportions with >1 factors. -->
<div class="constrainedContainer">
    <div class="grid gridTwoDoubleMaxFlexContent">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="20"></div>
    </div>
</div>

<!-- Allow the extra logical space distribution to occur. -->
<div style="width: 10px; height: 60px">
    <div class="grid gridTwoDoubleMaxFlexContent" style="height: 100%">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="12"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="48"></div>
    </div>
</div>

<!-- We normalize fraction flex factors to 1, so we don't keep exact proportions with >1 factors. -->
<div style="width: 10px; height: 60px">
    <div class="grid gridTwoDoubleMaxFlexContent">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="20"></div>
    </div>
</div>

<div style="width: 10px; height: 120px;">
    <div class="grid gridTwoDoubleMaxFlexContent" style="height: 100%">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="24"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="96"></div>
    </div>
</div>

<!-- We normalize fraction flex factors to 1, so we don't keep exact proportions with >1 factors. -->
<div style="width: 10px; height: 120px;">
    <div class="grid gridTwoDoubleMaxFlexContent">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="10"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="20"></div>
    </div>
</div>

<!-- Flex track length must be at least its baseSize. -->
<div style="width: 10px; height: 100px;">
    <div class="grid gridRespectBaseSize" style="height: 100%;">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="75"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="25"></div>
    </div>
</div>

<div style="width: 10px; height: 100px;">
    <div class="grid gridRespectBaseSize">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="75"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="150"></div>
    </div>
</div>

<!-- Flex track lengths must be proportional to their flex factors.. -->
<div style="width: 10px; height: 275px;">
    <div class="grid gridRespectProportions" style="height: 100%;">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="25"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="50"></div>
        <div class="sizedToGridArea thirdRowFirstColumn" data-expected-width="50" data-expected-height="200"></div>
    </div>
</div>

<div style="width: 10px; height: 275px;">
    <div class="grid gridRespectProportions">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="25"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="13"></div>
        <div class="sizedToGridArea thirdRowFirstColumn" data-expected-width="50" data-expected-height="50"></div>
    </div>
</div>

<!-- Flex track lengths must be proportional but still respecting their base sizes. -->
<div style="width: 10px; height: 350px;">
    <div class="grid gridRespectBaseSizeProportions" style="height: 100%;">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="50"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="100"></div>
        <div class="sizedToGridArea thirdRowFirstColumn" data-expected-width="50" data-expected-height="200"></div>
    </div>
</div>

<div style="width: 10px; height: 350px;">
    <div class="grid gridRespectBaseSizeProportions">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="50"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="25"></div>
        <div class="sizedToGridArea thirdRowFirstColumn" data-expected-width="50" data-expected-height="50"></div>
    </div>
</div>

<!-- Not enough space to respect proportions, because minTrackBreadh it's a harder requirement -->
<div style="width: 10px; height: 275px;">
    <div class="grid gridRespectBaseSizeBeforeProportions" style="height: 100%;">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="50"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="75"></div>
        <div class="sizedToGridArea thirdRowFirstColumn" data-expected-width="50" data-expected-height="150"></div>
    </div>
</div>

<div style="width: 10px; height: 275px;">
    <div class="grid gridRespectBaseSizeBeforeProportions">
        <div class="sizedToGridArea firstRowFirstColumn" data-expected-width="50" data-expected-height="50"></div>
        <div class="sizedToGridArea secondRowFirstColumn" data-expected-width="50" data-expected-height="25"></div>
        <div class="sizedToGridArea thirdRowFirstColumn" data-expected-width="50" data-expected-height="50"></div>
    </div>
</div>

</body>
</html>