1 files changed, 36 insertions, 0 deletions
diff --git a/devtools/client/inspector/markup/test/browser_markup_remove_xul_attributes.js b/devtools/client/inspector/markup/test/browser_markup_remove_xul_attributes.js
new file mode 100644
index 0000000000..89ac844149
--- /dev/null
+++ b/devtools/client/inspector/markup/test/browser_markup_remove_xul_attributes.js
@@ -0,0 +1,36 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test confirms that XUL attributes don't show up as empty
+// attributes after being deleted
+
+const TEST_URL = URL_ROOT_SSL + "doc_markup_xul.xhtml";
+
+add_task(async function () {
+  await SpecialPowers.pushPermissions([
+    { type: "allowXULXBL", allow: true, context: URL_ROOT_SSL },
+  ]);
+
+  const { inspector } = await openInspectorForURL(TEST_URL);
+
+  const panelFront = await getNodeFront("#test", inspector);
+  ok(
+    panelFront.hasAttribute("id"),
+    "panelFront has id attribute in the beginning"
+  );
+
+  info("Removing panel's id attribute");
+  const onMutation = inspector.once("markupmutation");
+  await removeContentPageElementAttribute("#test", "id");
+
+  info("Waiting for markupmutation");
+  await onMutation;
+
+  is(
+    panelFront.hasAttribute("id"),
+    false,
+    "panelFront doesn't have id attribute anymore"
+  );
+});