python: Import improved python bindings.

This commit imports the python bindings from:
    https://github.com/poljar/python-olm

The bindings are imported at commit c44b145818520d69eaaa350fb95afcb846125e0f

Minor modifications were made while importing:
    - Removed travis config
    - Removed Arch Linux PKGBUILD
    - Removed the html docs, they can be rebuild by running make html in
      the docs folder
    - Slightly modified the README

The new bindings feature some improvements over the old ones:
    - Python 2 and 3 support
    - Automatic memory management
    - Automatic memory clearing before it is freed
    - Type signatures via the python typing module
    - Full test coverage
    - Properties are utilized where it makes sense (e.g. account.id)

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

1 files changed, 114 insertions, 0 deletions

diff --git a/python/tests/group_session_test.py b/python/tests/group_session_test.py
new file mode 100644
index 0000000..c17e84f
--- /dev/null
+++ b/python/tests/group_session_test.py
@@ -0,0 +1,114 @@
+import pytest
+
+from olm import InboundGroupSession, OlmGroupSessionError, OutboundGroupSession
+
+
+class TestClass(object):
+    def test_session_create(self):
+        OutboundGroupSession()
+
+    def test_session_id(self):
+        session = OutboundGroupSession()
+        assert isinstance(session.id, str)
+
+    def test_session_index(self):
+        session = OutboundGroupSession()
+        assert isinstance(session.message_index, int)
+        assert session.message_index == 0
+
+    def test_outbound_pickle(self):
+        session = OutboundGroupSession()
+        pickle = session.pickle()
+
+        assert (session.id == OutboundGroupSession.from_pickle(
+            pickle).id)
+
+    def test_invalid_unpickle(self):
+        with pytest.raises(ValueError):
+            OutboundGroupSession.from_pickle(b"")
+
+        with pytest.raises(ValueError):
+            InboundGroupSession.from_pickle(b"")
+
+    def test_inbound_create(self):
+        outbound = OutboundGroupSession()
+        InboundGroupSession(outbound.session_key)
+
+    def test_invalid_decrypt(self):
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+
+        with pytest.raises(ValueError):
+            inbound.decrypt("")
+
+    def test_inbound_pickle(self):
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+        pickle = inbound.pickle()
+        InboundGroupSession.from_pickle(pickle)
+
+    def test_inbound_export(self):
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+        imported = InboundGroupSession.import_session(
+            inbound.export_session(inbound.first_known_index)
+        )
+        assert "Test", 0 == imported.decrypt(outbound.encrypt("Test"))
+
+    def test_first_index(self):
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+        index = inbound.first_known_index
+        assert isinstance(index, int)
+
+    def test_encrypt(self, benchmark):
+        benchmark.weave(OutboundGroupSession.encrypt, lazy=True)
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+        assert "Test", 0 == inbound.decrypt(outbound.encrypt("Test"))
+
+    def test_decrypt(self, benchmark):
+        benchmark.weave(InboundGroupSession.decrypt, lazy=True)
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+        assert "Test", 0 == inbound.decrypt(outbound.encrypt("Test"))
+
+    def test_decrypt_twice(self):
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+        outbound.encrypt("Test 1")
+        message, index = inbound.decrypt(outbound.encrypt("Test 2"))
+        assert isinstance(index, int)
+        assert ("Test 2", 1) == (message, index)
+
+    def test_decrypt_failure(self):
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+        eve_outbound = OutboundGroupSession()
+        with pytest.raises(OlmGroupSessionError):
+            inbound.decrypt(eve_outbound.encrypt("Test"))
+
+    def test_id(self):
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+        assert outbound.id == inbound.id
+
+    def test_inbound_fail(self):
+        with pytest.raises(TypeError):
+            InboundGroupSession()
+
+    def test_oubtound_pickle_fail(self):
+        outbound = OutboundGroupSession()
+        pickle = outbound.pickle("Test")
+
+        with pytest.raises(OlmGroupSessionError):
+            OutboundGroupSession.from_pickle(pickle)
+
+    def test_outbound_clear(self):
+        session = OutboundGroupSession()
+        del session
+
+    def test_inbound_clear(self):
+        outbound = OutboundGroupSession()
+        inbound = InboundGroupSession(outbound.session_key)
+        del inbound