Add google.auth.crypt (#6)
diff --git a/tests/test__helpers.py b/tests/test__helpers.py
new file mode 100644
index 0000000..b7e0bab
--- /dev/null
+++ b/tests/test__helpers.py
@@ -0,0 +1,50 @@
+# Copyright 2016 Google Inc.
+#
+# 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 pytest
+
+from google.auth import _helpers
+
+
+def test_to_bytes_with_bytes():
+ value = b'bytes-val'
+ assert _helpers.to_bytes(value) == value
+
+
+def test_to_bytes_with_unicode():
+ value = u'string-val'
+ encoded_value = b'string-val'
+ assert _helpers.to_bytes(value) == encoded_value
+
+
+def test_to_bytes_with_nonstring_type():
+ with pytest.raises(ValueError):
+ _helpers.to_bytes(object())
+
+
+def test_from_bytes_with_unicode():
+ value = u'bytes-val'
+ assert _helpers.from_bytes(value) == value
+
+
+def test_from_bytes_with_bytes():
+ value = b'string-val'
+ decoded_value = u'string-val'
+ assert _helpers.from_bytes(value) == decoded_value
+
+
+def test_from_bytes_with_nonstring_type():
+ with pytest.raises(ValueError):
+ _helpers.from_bytes(object())