add security py

backend/tests/test_security.py

@@ -1,4 +1,24 @@
 from trading_journal import security
 
-def test_hash_password() -> None:
+
+def test_hash_and_verify_password() -> None:
     plain = "password"
+    hashed = security.hash_password(plain)
+    assert hashed != plain
+    assert security.verify_password(plain, hashed)
+
+
+def test_generate_session_token() -> None:
+    token1 = security.generate_session_token()
+    token2 = security.generate_session_token()
+    assert token1 != token2
+    assert len(token1) > 0
+    assert len(token2) > 0
+
+
+def test_hash_and_verify_session_token_sha256() -> None:
+    token = security.generate_session_token()
+    token_hash = security.hash_session_token_sha256(token)
+    assert token_hash != token
+    assert security.verify_token_sha256(token, token_hash)
+    assert not security.verify_token_sha256(token + "x", token_hash)