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 000000000..21c70c968
--- /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() {
+  do_check_matches({x:1}, {});         // fail: all pattern props required
+  do_check_matches({x:1}, {x:2});      // fail: values must match
+  do_check_matches({x:undefined}, {});
+
+  // 'length' property counts, even if non-enumerable.
+  do_check_matches([3,4,5], [3,5,5]);  // fail; value doesn't match
+  do_check_matches([3,4,5], [3,4,5,6]);// fail; length doesn't match
+}