Add WPT coverage for the drawing order of absolutely positioned boxes inside flex items.
Differential Revision: https://phabricator.services.mozilla.com/D117187
bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1715302
gecko-commit: 86b7f32c2f965c02ebf5c47280f9222647ed7a27
gecko-reviewers: emilio
diff --git a/css/css-flexbox/order/order-abs-children-painting-order.html b/css/css-flexbox/order/order-abs-children-painting-order.html
new file mode 100644
index 0000000..248f380
--- /dev/null
+++ b/css/css-flexbox/order/order-abs-children-painting-order.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<title>CSS Test: flex order affects painting order of absolutely positioned boxes inside flex</title>
+<link rel="author" title="Dennis Schubert" href="mailto:dschubert@mozilla.com">
+<link rel="author" href="https://mozilla.org" title="Mozilla">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#propdef-order">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=606208">
+<link rel="match" href="../../reference/ref-filled-green-100px-square-only.html">
+<meta name="assert" content="This test check that absolutely positioned boxes inside flex items have their painting orders affected by 'order'.">
+<style>
+ #test {
+ display: flex;
+ position: relative;
+ height: 100px;
+ width: 100px;
+ }
+
+ #order-1 {
+ order: 1;
+ }
+
+ #order-2 {
+ order: 2;
+ }
+
+ .inner {
+ position: absolute;
+ bottom: 0;
+ left: 0;
+ right: 0;
+ top: 0;
+ }
+
+ #order-1 .inner {
+ background-color: red;
+ }
+
+ #order-2 .inner {
+ background-color: green;
+ }
+</style>
+<p>Test passes if there is a filled green square.</p>
+<div id="test">
+ <div id="order-2">
+ <div class="inner"></div>
+ </div>
+ <div id="order-1">
+ <div class="inner"></div>
+ </div>
+</div>
