python: Expose the sha256() function in the utilities.

Signed-off-by: Damir Jelić <poljar@termina.org.uk>

1 files changed, 29 insertions, 0 deletions

diff --git a/python/tests/utils_test.py b/python/tests/utils_test.py
new file mode 100644
index 0000000..a552d12
--- /dev/null
+++ b/python/tests/utils_test.py
@@ -0,0 +1,29 @@
+import base64
+import hashlib
+
+from future.utils import bytes_to_native_str
+from hypothesis import given
+from hypothesis.strategies import text
+
+from olm import sha256
+from olm._compat import to_bytes
+
+
+class TestClass(object):
+    @given(text(), text())
+    def test_sha256(self, input1, input2):
+        first_hash = sha256(input1)
+        second_hash = sha256(input2)
+
+        hashlib_hash = base64.b64encode(
+            hashlib.sha256(to_bytes(input1)).digest()
+        )
+
+        hashlib_hash = bytes_to_native_str(hashlib_hash[:-1])
+
+        if input1 == input2:
+            assert first_hash == second_hash
+        else:
+            assert first_hash != second_hash
+
+        assert hashlib_hash == first_hash