1 files changed, 27 insertions, 0 deletions
diff --git a/devtools/client/inspector/compatibility/test/xpcshell/test_default-browsers.js b/devtools/client/inspector/compatibility/test/xpcshell/test_default-browsers.js
new file mode 100644
index 0000000000..c565e77d01
--- /dev/null
+++ b/devtools/client/inspector/compatibility/test/xpcshell/test_default-browsers.js
@@ -0,0 +1,27 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test for the default browsers of user settings.
+
+const {
+  getBrowsersList,
+} = require("resource://devtools/shared/compatibility/compatibility-user-settings.js");
+
+add_task(async () => {
+  info("Check whether each default browsers data are unique by id and status");
+
+  const defaultBrowsers = await getBrowsersList();
+
+  for (const target of defaultBrowsers) {
+    const count = defaultBrowsers.reduce(
+      (currentCount, browser) =>
+        target.id === browser.id && target.status === browser.status
+          ? currentCount + 1
+          : currentCount,
+      0
+    );
+
+    equal(count, 1, `This browser (${target.id} - ${target.status}) is unique`);
+  }
+});