1 files changed, 12 insertions, 0 deletions
diff --git a/testing/xpcshell/example/unit/test_do_check_matches_failing.js b/testing/xpcshell/example/unit/test_do_check_matches_failing.js
new file mode 100644
index 0000000000..c45ec3469b
--- /dev/null
+++ b/testing/xpcshell/example/unit/test_do_check_matches_failing.js
@@ -0,0 +1,12 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function run_test() {
+  Assert.deepEqual({ x: 1 }, {}); // fail: all pattern props required
+  Assert.deepEqual({ x: 1 }, { x: 2 }); // fail: values must match
+  Assert.deepEqual({ x: undefined }, {});
+
+  // 'length' property counts, even if non-enumerable.
+  Assert.deepEqual([3, 4, 5], [3, 5, 5]); // fail; value doesn't match
+  Assert.deepEqual([3, 4, 5], [3, 4, 5, 6]); // fail; length doesn't match
+}