1 files changed, 40 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_webconsole_object_inspector__proto__.js b/devtools/client/webconsole/test/browser/browser_webconsole_object_inspector__proto__.js
new file mode 100644
index 0000000000..9ae55ce190
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_webconsole_object_inspector__proto__.js
@@ -0,0 +1,40 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Check displaying object with __proto__ in the console.
+const TEST_URI =
+  "data:text/html;charset=utf8,<!DOCTYPE html><h1>test Object Inspector __proto__</h1>";
+
+add_task(async function () {
+  const hud = await openNewTabAndConsole(TEST_URI);
+
+  logAllStoreChanges(hud);
+
+  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], function () {
+    const obj = Object.create(null);
+    // eslint-disable-next-line no-proto
+    obj.__proto__ = [];
+    content.wrappedJSObject.console.log("oi-test", obj);
+  });
+
+  const node = await waitFor(() => findConsoleAPIMessage(hud, "oi-test"));
+  const objectInspector = node.querySelector(".tree");
+  ok(objectInspector, "Object is printed in the console");
+
+  is(
+    objectInspector.textContent.trim(),
+    "Object { __proto__: [] }",
+    "Object is displayed as expected"
+  );
+
+  objectInspector.querySelector(".arrow").click();
+  await waitFor(() => node.querySelectorAll(".tree-node").length === 2);
+
+  const __proto__Node = node.querySelector(".tree-node:last-of-type");
+  ok(
+    __proto__Node.textContent.includes("__proto__: Array []"),
+    "__proto__ node is displayed as expected"
+  );
+});