1 files changed, 31 insertions, 0 deletions
diff --git a/devtools/client/framework/test/browser_about-devtools-toolbox_load.js b/devtools/client/framework/test/browser_about-devtools-toolbox_load.js
new file mode 100644
index 0000000000..abcb59a5d6
--- /dev/null
+++ b/devtools/client/framework/test/browser_about-devtools-toolbox_load.js
@@ -0,0 +1,31 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Test that about:devtools-toolbox shows error an page when opened with invalid
+ * paramters
+ */
+add_task(async function () {
+  // test that error is shown when missing `type` param
+  let { document, tab } = await openAboutToolbox({ invalid: "invalid" });
+  await assertErrorIsShown(document);
+  await removeTab(tab);
+  // test that error is shown if `id` is not provided
+  ({ document, tab } = await openAboutToolbox({ type: "tab" }));
+  await assertErrorIsShown(document);
+  await removeTab(tab);
+  // test that error is shown if `remoteId` refers to an unexisting target
+  ({ document, tab } = await openAboutToolbox({
+    type: "tab",
+    remoteId: "13371337",
+  }));
+  await assertErrorIsShown(document);
+  await removeTab(tab);
+
+  async function assertErrorIsShown(doc) {
+    await waitUntil(() => doc.querySelector(".qa-error-page"));
+    ok(doc.querySelector(".qa-error-page"), "Error page is rendered");
+  }
+});