1 files changed, 26 insertions, 0 deletions
diff --git a/tests/check_json_test.py b/tests/check_json_test.py
new file mode 100644
index 0000000..3ec67f1
--- /dev/null
+++ b/tests/check_json_test.py
@@ -0,0 +1,26 @@
+import pytest
+
+from pre_commit_hooks.check_json import main
+from testing.util import get_resource_path
+
+
+@pytest.mark.parametrize(
+    ('filename', 'expected_retval'), (
+        ('bad_json.notjson', 1),
+        ('bad_json_latin1.nonjson', 1),
+        ('ok_json.json', 0),
+        ('duplicate_key_json.notjson', 1),
+    ),
+)
+def test_main(capsys, filename, expected_retval):
+    ret = main([get_resource_path(filename)])
+    assert ret == expected_retval
+    if expected_retval == 1:
+        stdout, _ = capsys.readouterr()
+        assert filename in stdout
+
+
+def test_non_utf8_file(tmpdir):
+    f = tmpdir.join('t.json')
+    f.write_binary(b'\xa9\xfe\x12')
+    assert main((str(f),))