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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Grid Layout Test: Support 'repeat()' notation for 'grid-template-columns' and 'grid-template-rows' properties</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<link rel="help" href="http://www.w3.org/TR/css-grid-1/#repeat-notation" title="5.1.2 Repeating Rows and Columns: the 'repeat()' notation">
+<meta name="assert" content="This test checks that 'grid-template-columns' and 'grid-template-rows' properties support 'repeat()' notation, and that their declared value serializes correctly.">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+<style>
+#grid {
+  display: grid;
+  width: 800px;
+  height: 600px;
+  font: 10px/1 Ahem;
+  justify-content: start;
+  align-content: start;
+}
+</style>
+
+<div id="log"></div>
+
+<div id="grid">
+  <div>GRID ITEM</div>
+</div>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+setup({explicit_done: true});
+var {style} = document.getElementById("grid");
+
+function testGridTemplateColumnsRows(assignedValue, expectedValue = assignedValue) {
+  test(function() {
+      style.gridTemplateColumns = assignedValue;
+      style.gridTemplateRows = assignedValue;
+      assert_equals(style.gridTemplateColumns, expectedValue, "gridTemplateColumns");
+      assert_equals(style.gridTemplateRows, expectedValue, "gridTemplateRows");
+  }, `grid-template-columns: ${assignedValue}; and grid-template-rows: ${assignedValue};`);
+}
+
+document.fonts.ready.then(() => {
+  // Valid values.
+  testGridTemplateColumnsRows("repeat(1, auto)");
+  testGridTemplateColumnsRows("repeat(2, auto)");
+  testGridTemplateColumnsRows("repeat(2, minmax(50px, calc(50% + 50px)))");
+  testGridTemplateColumnsRows("repeat(5, 10%)");
+  testGridTemplateColumnsRows("max-content repeat(2, 25%) 1fr");
+  testGridTemplateColumnsRows("repeat(2, min-content 50px)");
+  testGridTemplateColumnsRows("repeat(2, [a] minmax(50px, 100px) [b] 25em [c])");
+  testGridTemplateColumnsRows("[a] repeat(2, auto [b] 100px) [c]");
+  testGridTemplateColumnsRows("[a] auto repeat(2, [b] 100px) [c]");
+  testGridTemplateColumnsRows("[a] repeat(2, auto [b]) 100px [c]");
+  testGridTemplateColumnsRows("[a] repeat(2, [b] 100px)");
+  testGridTemplateColumnsRows("[a] repeat(2, [b] auto [c]) [d]");
+  testGridTemplateColumnsRows("[a] min-content repeat(2, [b] 1fr [c] calc(10% + 20px)) [d] minmax(30em, 50em) [e]");
+
+  // Reset values.
+  style.gridTemplateColumns = "";
+  style.gridTemplateRows = "";
+
+  // Wrong values.
+  testGridTemplateColumnsRows("repeat(-1, auto)", "");
+  testGridTemplateColumnsRows("repeat(auto, 2)", "");
+  testGridTemplateColumnsRows("repeat 2, auto", "");
+  testGridTemplateColumnsRows("repeat(2 auto)", "");
+  testGridTemplateColumnsRows("100px (repeat 2, auto)", "");
+  testGridTemplateColumnsRows("repeat(2, 50px repeat(2, 100px))", "");
+  testGridTemplateColumnsRows("100px repeat(2, [a])", "");
+  done();
+});
+</script>