test: add tests if connecting for if odk central fails

tests/test_central.py

@@ -24,6 +24,9 @@
 import requests
 import segno
 
+from osm_fieldwork.OdkCentral import OdkCentral
+from osm_fieldwork.OdkCentralAsync import OdkCentral as OdkCentralAsync
+
 testdata_dir = Path(__file__).parent / "testdata"
 
 
@@ -224,3 +227,26 @@ def test_form_fields(odk_form_cleanup):
         "binary": None,
         "selectMultiple": None,
     }
+
+
+def test_invalid_connection_sync():
+    """Test case when connection to Central fails, sync code."""
+    central = OdkCentral("https://proxy", "[email protected]", "Password1234")
+    assert central.listProjects() == []
+
+    with pytest.raises(ConnectionError, match="Failed to connect to Central. Is the URL valid?"):
+        OdkCentral("https://somerandominvalidurl546456546.xyz", "[email protected]", "Password1234")
+
+    with pytest.raises(ConnectionError, match="ODK credentials are invalid, or may have changed. Please update them."):
+        OdkCentral("https://proxy", "[email protected]", "Password1234")
+
+
+async def test_invalid_connection_async():
+    """Test case when connection to Central fails, async code."""
+    with pytest.raises(ConnectionError, match="Failed to connect to Central. Is the URL valid?"):
+        async with OdkCentralAsync("https://somerandominvalidurl546456546.xyz", "[email protected]", "Password1234"):
+            pass
+
+    with pytest.raises(ConnectionError, match="ODK credentials are invalid, or may have changed. Please update them."):
+        async with OdkCentralAsync("https://proxy", "[email protected]", "Password1234"):
+            pass