diff --git a/.vscode/settings.json b/.vscode/settings.json
index d855e4e..34ed784 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -5,5 +5,8 @@
     "azureFunctions.projectLanguage": "Python",
     "azureFunctions.projectRuntime": "~4",
     "debug.internalConsoleOptions": "neverOpen",
-    "azureFunctions.projectLanguageModel": 2
+    "azureFunctions.projectLanguageModel": 2,
+    "python.testing.unittestArgs": ["-v", "-s", "./test", "-p", "test_*.py"],
+    "python.testing.pytestEnabled": false,
+    "python.testing.unittestEnabled": true
 }
diff --git a/src/geodienste_api.py b/src/geodienste_api.py
new file mode 100644
index 0000000..2a493a7
--- /dev/null
+++ b/src/geodienste_api.py
@@ -0,0 +1,15 @@
+class GeodiensteApi:
+    """Handles all calls to the geodienste API"""
+
+    def __init__(self):
+        print("GeodiensteApi initialized")
+
+    def topic_has_changed(self, topic_name: str):
+        """Check if the topic has changed since the last call"""
+        print("Checking for changes in topics", topic_name)
+        return True
+
+    def get_topics(self, topic_name: str):
+        """Get all topics"""
+        print("Getting the topic ", topic_name, " from the API")
+        return []
diff --git a/test/test_geodienste_api.py b/test/test_geodienste_api.py
new file mode 100644
index 0000000..1cf73a0
--- /dev/null
+++ b/test/test_geodienste_api.py
@@ -0,0 +1,16 @@
+import unittest
+from src.geodienste_api import GeodiensteApi
+
+
+class TestGeodiensteApi(unittest.TestCase):
+    """Test class for Geodienste API"""
+
+    def test_topic_has_changed(self):
+        """Test if the topic has changed"""
+        geodienste_api = GeodiensteApi()
+        geodienste_api.topic_has_changed("test_topic")
+        self.assertEqual(True, True)
+
+
+if __name__ == "__main__":
+    unittest.main()