Add fixtures for alice, bob, and carol

tests/conftest.py

@@ -223,6 +223,54 @@ def user2_pk():
     return USER2_PK
 
 
+@pytest.fixture
+def alice():
+    from bigchaindb.common.crypto import generate_key_pair
+    return generate_key_pair()
+
+
+@pytest.fixture
+def alice_privkey(alice):
+    return alice.private_key
+
+
+@pytest.fixture
+def alice_pubkey(alice):
+    return alice.public_key
+
+
+@pytest.fixture
+def bob():
+    from bigchaindb.common.crypto import generate_key_pair
+    return generate_key_pair()
+
+
+@pytest.fixture
+def bob_privkey(bob):
+    return bob.private_key
+
+
+@pytest.fixture
+def bob_pubkey(carol):
+    return bob.public_key
+
+
+@pytest.fixture
+def carol():
+    from bigchaindb.common.crypto import generate_key_pair
+    return generate_key_pair()
+
+
+@pytest.fixture
+def carol_privkey(carol):
+    return carol.private_key
+
+
+@pytest.fixture
+def carol_pubkey(carol):
+    return carol.public_key
+
+
 @pytest.fixture
 def b():
     from bigchaindb import Bigchain