Check for JSON key non-duplication and order

2 files changed, 13 insertions, 0 deletions

diff --git a/python/tidy/servo_tidy_tests/test_tidy.py b/python/tidy/servo_tidy_tests/test_tidy.py
index d997bb00f82..6dd97aee7e3 100644
--- a/python/tidy/servo_tidy_tests/test_tidy.py
+++ b/python/tidy/servo_tidy_tests/test_tidy.py
@@ -171,6 +171,12 @@ class CheckTidiness(unittest.TestCase):
         self.assertEqual('Duplicated Key (the_duplicated_key)', errors.next()[2])
         self.assertNoMoreErrors(errors)
 
+    def test_json_with_unordered_keys(self):
+        tidy.config["check-ordered-json-keys"].append('python/tidy/servo_tidy_tests/unordered_key.json')
+        errors = tidy.collect_errors_for_files(iterFile('unordered_key.json'), [tidy.check_json], [], print_text=False)
+        self.assertEqual('Unordered key (found b before a)', errors.next()[2])
+        self.assertNoMoreErrors(errors)
+
     def test_lock(self):
         errors = tidy.collect_errors_for_files(iterFile('duplicated_package.lock'), [tidy.check_lock], [], print_text=False)
         msg = """duplicate versions for package "test"
diff --git a/python/tidy/servo_tidy_tests/unordered_key.json b/python/tidy/servo_tidy_tests/unordered_key.json
new file mode 100644
index 00000000000..36f0a13f9c2
--- /dev/null
+++ b/python/tidy/servo_tidy_tests/unordered_key.json
@@ -0,0 +1,7 @@
+{
+    "key": "value",
+    "other_key": {
+        "b": 1,
+        "a": 2
+    }
+}