1 files changed, 28 insertions, 0 deletions
diff --git a/tests/detect_private_key_test.py b/tests/detect_private_key_test.py
new file mode 100644
index 0000000..41f8bae
--- /dev/null
+++ b/tests/detect_private_key_test.py
@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+import pytest
+
+from pre_commit_hooks.detect_private_key import main
+
+# Input, expected return value
+TESTS = (
+    (b'-----BEGIN RSA PRIVATE KEY-----', 1),
+    (b'-----BEGIN DSA PRIVATE KEY-----', 1),
+    (b'-----BEGIN EC PRIVATE KEY-----', 1),
+    (b'-----BEGIN OPENSSH PRIVATE KEY-----', 1),
+    (b'PuTTY-User-Key-File-2: ssh-rsa', 1),
+    (b'---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----', 1),
+    (b'-----BEGIN ENCRYPTED PRIVATE KEY-----', 1),
+    (b'-----BEGIN OpenVPN Static key V1-----', 1),
+    (b'ssh-rsa DATA', 0),
+    (b'ssh-dsa DATA', 0),
+    # Some arbitrary binary data
+    (b'\xa2\xf1\x93\x12', 0),
+)
+
+
+@pytest.mark.parametrize(('input_s', 'expected_retval'), TESTS)
+def test_main(input_s, expected_retval, tmpdir):
+    path = tmpdir.join('file.txt')
+    path.write_binary(input_s)
+    assert main([str(path)]) == expected_retval