1 files changed, 59 insertions, 0 deletions
diff --git a/tests/primitives/test_block.py b/tests/primitives/test_block.py
new file mode 100644
index 00000000..799e5f03
--- /dev/null
+++ b/tests/primitives/test_block.py
@@ -0,0 +1,59 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import binascii
+
+import pytest
+
+from cryptography.primitives.block import BlockCipher, ciphers, modes
+
+
+class TestBlockCipher(object):
+    def test_cipher_name(self):
+        cipher = BlockCipher(
+            ciphers.AES(binascii.unhexlify(b"0" * 32)),
+            modes.CBC(binascii.unhexlify(b"0" * 32))
+        )
+        assert cipher.name == "AES-128-CBC"
+
+    def test_use_after_finalize(self):
+        cipher = BlockCipher(
+            ciphers.AES(binascii.unhexlify(b"0" * 32)),
+            modes.CBC(binascii.unhexlify(b"0" * 32))
+        )
+        cipher.encrypt(b"a" * 16)
+        cipher.finalize()
+        with pytest.raises(ValueError):
+            cipher.encrypt(b"b" * 16)
+        with pytest.raises(ValueError):
+            cipher.finalize()
+
+    def test_encrypt_with_invalid_operation(self):
+        cipher = BlockCipher(
+            ciphers.AES(binascii.unhexlify(b"0" * 32)),
+            modes.CBC(binascii.unhexlify(b"0" * 32))
+        )
+        cipher._operation = "decrypt"
+
+        with pytest.raises(ValueError):
+            cipher.encrypt(b"b" * 16)
+
+    def test_finalize_with_invalid_operation(self):
+        cipher = BlockCipher(
+            ciphers.AES(binascii.unhexlify(b"0" * 32)),
+            modes.CBC(binascii.unhexlify(b"0" * 32))
+        )
+        cipher._operation = "wat"
+
+        with pytest.raises(ValueError):
+            cipher.encrypt(b"b" * 16)