1 files changed, 42 insertions, 0 deletions
diff --git a/tests/primitives/utils.py b/tests/primitives/utils.py
new file mode 100644
index 00000000..3cf08c28
--- /dev/null
+++ b/tests/primitives/utils.py
@@ -0,0 +1,42 @@
+import binascii
+import os
+
+import pytest
+
+from cryptography.bindings import _ALL_APIS
+from cryptography.primitives.block import BlockCipher
+
+
+def generate_encrypt_test(param_loader, path, file_names, cipher_factory,
+                          mode_factory, only_if=lambda api: True,
+                          skip_message=None):
+    def test_encryption(self):
+        for api in _ALL_APIS:
+            for file_name in file_names:
+                for params in param_loader(os.path.join(path, file_name)):
+                    yield (
+                        encrypt_test,
+                        api,
+                        cipher_factory,
+                        mode_factory,
+                        params,
+                        only_if,
+                        skip_message
+                    )
+    return test_encryption
+
+
+def encrypt_test(api, cipher_factory, mode_factory, params, only_if,
+                 skip_message):
+    if not only_if(api):
+        pytest.skip(skip_message)
+    plaintext = params.pop("plaintext")
+    ciphertext = params.pop("ciphertext")
+    cipher = BlockCipher(
+        cipher_factory(**params),
+        mode_factory(**params),
+        api
+    )
+    actual_ciphertext = cipher.encrypt(binascii.unhexlify(plaintext))
+    actual_ciphertext += cipher.finalize()
+    assert actual_ciphertext == binascii.unhexlify(ciphertext)