add login-logout functionality

tests/api/test_common.py

@@ -1,6 +1,7 @@
 import pytest
 
 from delta_barth.api import common
+from delta_barth.constants import HTTP_CONTENT_HEADERS
 from delta_barth.errors import UnspecifiedRequestType
 from delta_barth.types import HttpRequestTypes
 
@@ -54,3 +55,32 @@ def test_ping(api_base_url):
 
     with pytest.raises(UnspecifiedRequestType):
         resp = common.ping(api_base_url, HttpRequestTypes.POST)
+
+
+@pytest.mark.api_con_required
+def test_login_logout(credentials, api_base_url):
+    assert HTTP_CONTENT_HEADERS.session_token is None
+    resp = common.login(
+        base_url=api_base_url,
+        user_name=credentials["user"],
+        password=credentials["pwd"],
+        database=credentials["db"],
+        mandant=credentials["mandant"],
+    )
+    assert resp.error is None
+    assert HTTP_CONTENT_HEADERS.session_token is not None
+    resp = common.logout(
+        base_url=api_base_url,
+    )
+    assert HTTP_CONTENT_HEADERS.session_token is None
+    assert "DelecoToken" not in HTTP_CONTENT_HEADERS
+    resp = common.login(
+        base_url=api_base_url,
+        user_name=credentials["user"],
+        password="WRONG_PASSWORD",
+        database=credentials["db"],
+        mandant=credentials["mandant"],
+    )
+    assert resp.error is not None
+    assert resp.error.status_code == 409
+    assert resp.error.message == "Nutzer oder Passwort falsch."