1 files changed, 89 insertions, 0 deletions
diff --git a/testing/web-platform/tests/shadow-dom/focus-navigation/reading-order/tentative/grid-order.html b/testing/web-platform/tests/shadow-dom/focus-navigation/reading-order/tentative/grid-order.html
new file mode 100644
index 0000000000..1b86ab0b25
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+++ b/testing/web-platform/tests/shadow-dom/focus-navigation/reading-order/tentative/grid-order.html
@@ -0,0 +1,89 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Display: reading-order-items with value grid-order</title>
+<link rel="help" href="https://drafts.csswg.org/css-display-4/#reading-order-items">
+<link rel="author" title="Di Zhang" href="mailto:dizhangg@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src='../../resources/shadow-dom.js'></script>
+<script src="../../resources/focus-utils.js"></script>
+
+<style>
+.wrapper {
+  display: grid;
+  reading-order-items: grid-order;
+}
+</style>
+
+<div class="test-case" data-expect="a1,b1,c1,d1,e1"
+      data-description="Grid items without `order` property">
+  <div class="wrapper">
+    <button id="a1">Item A</button>
+    <button id="b1">Item B</button>
+    <button id="c1">Item C</button>
+  </div>
+  <div class="wrapper">
+    <button id="d1">Item D</button>
+    <button id="e1">Item E</button>
+  </div>
+</div>
+
+<div class="test-case" data-expect="b2,c2,a2,e2,d2"
+      data-description="Grid items with `order` property">
+  <div class="wrapper">
+    <button id="a2" style="order: 2">Item A</button>
+    <button id="b2">Item B</button>
+    <button id="c2">Item C</button>
+  </div>
+  <div class="wrapper">
+    <button id="d2">Item D</button>
+    <button id="e2" style="order: -1">Item E</button>
+  </div>
+</div>
+
+<div class="test-case" data-expect="c3,a3,b3,d3,f3,e3"
+      data-description="Grid items with `order` property and tabindex">
+  <div class="wrapper">
+    <button id="a3" style="order: -1">Item A</button>
+    <button id="b3" style="order: 0">Item B</button>
+    <button id="c3" tabindex="1" style="order: -1">Item C</button>
+  </div>
+  <div class="wrapper">
+    <button id="d3" tabindex="1" style="order: 1">Item D</button>
+    <button id="e3" tabindex="2" style="order: 0">Item E</button>
+    <button id="f3" tabindex="2" style="order: -1">Item F</button>
+  </div>
+</div>
+
+<div class="test-case" data-expect="order1,order2,order3,order4"
+     data-description="Items in display contents are sorted in same grid container.">
+  <div class="wrapper">
+    <div style="display: contents">
+      <button id="order3" style="order: 3">Order 3</button>
+      <button id="order1" style="order: 1">Order 1</button>
+      <div style="display: contents">
+        <button id="order4" style="order: 4">Order 4</button>
+        <button id="order2" style="order: 2">Order 2</button>
+      </div>
+    </div>
+  </div>
+</div>
+
+<div class="test-case" data-expect="d4,b4,c4,a4"
+      data-description="Items in display block are not in parent grid container.">
+  <div class="wrapper">
+    <button id="a4" style="order: 3">A</button>
+    <div style="order: 1" style="display: block">
+      <button id="b4" style="order: 2">B</button>
+      <button id="c4" style="order: -1">C</button>
+    </div>
+    <button id="d4">D</button>
+  </div>
+</div>
+
+<script>
+runFocusTestCases();
+</script>