Add a hook for yaml files.
diff --git a/tests/check_yaml_test.py b/tests/check_yaml_test.py
new file mode 100644
index 0000000..8985e8c
--- /dev/null
+++ b/tests/check_yaml_test.py
@@ -0,0 +1,14 @@
+
+import pytest
+
+from pre_commit_hooks.check_yaml import check_yaml
+from testing.util import get_resource_path
+
+
+@pytest.mark.parametrize(('filename', 'expected_retval'), (
+ ('bad_yaml.notyaml', 1),
+ ('ok_yaml.yaml', 0),
+))
+def test_check_yaml(filename, expected_retval):
+ ret = check_yaml([get_resource_path(filename)])
+ assert ret == expected_retval
