1 files changed, 48 insertions, 0 deletions
diff --git a/devtools/client/inspector/rules/test/browser_rules_mark_overridden_02.js b/devtools/client/inspector/rules/test/browser_rules_mark_overridden_02.js
new file mode 100644
index 0000000000..283419def9
--- /dev/null
+++ b/devtools/client/inspector/rules/test/browser_rules_mark_overridden_02.js
@@ -0,0 +1,48 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that the rule view marks overridden rules correctly for short hand
+// properties and the computed list properties
+
+const TEST_URI = `
+  <style type='text/css'>
+  #testid {
+    margin-left: 1px;
+  }
+  .testclass {
+    margin: 2px;
+  }
+  </style>
+  <div id='testid' class='testclass'>Styled Node</div>
+`;
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+  const { inspector, view } = await openRuleView();
+  await selectNode("#testid", inspector);
+  await testMarkOverridden(inspector, view);
+});
+
+function testMarkOverridden(inspector, view) {
+  const elementStyle = view._elementStyle;
+
+  const classRule = elementStyle.rules[2];
+  const classProp = classRule.textProps[0];
+  ok(
+    !classProp.overridden,
+    "Class prop shouldn't be overridden, some props are still being used."
+  );
+
+  for (const computed of classProp.computed) {
+    if (computed.name.indexOf("margin-left") == 0) {
+      ok(computed.overridden, "margin-left props should be overridden.");
+    } else {
+      ok(
+        !computed.overridden,
+        "Non-margin-left props should not be overridden."
+      );
+    }
+  }
+}