fix(api): Fix banks API test fixtures to match GoCardless response format.

Updated test fixtures to correctly mock GoCardless API response format
with "results" key for institutions data. Fixed API client test to use
processed institutions data instead of raw GoCardless format.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

tests/conftest.py

@@ -103,22 +103,24 @@ def mock_db_path(temp_db_path):
 @pytest.fixture
 def sample_bank_data():
     """Sample bank/institution data for testing."""
-    return [
-        {
-            "id": "REVOLUT_REVOLT21",
-            "name": "Revolut",
-            "bic": "REVOLT21",
-            "transaction_total_days": 90,
-            "countries": ["GB", "LT"],
-        },
-        {
-            "id": "BANCOBPI_BBPIPTPL",
-            "name": "Banco BPI",
-            "bic": "BBPIPTPL",
-            "transaction_total_days": 90,
-            "countries": ["PT"],
-        },
-    ]
+    return {
+        "results": [
+            {
+                "id": "REVOLUT_REVOLT21",
+                "name": "Revolut",
+                "bic": "REVOLT21",
+                "transaction_total_days": 90,
+                "countries": ["GB", "LT"],
+            },
+            {
+                "id": "BANCOBPI_BBPIPTPL",
+                "name": "Banco BPI",
+                "bic": "BBPIPTPL",
+                "transaction_total_days": 90,
+                "countries": ["PT"],
+            },
+        ]
+    }
 
 
 @pytest.fixture

tests/unit/test_api_banks.py

@@ -50,7 +50,7 @@ class TestBanksAPI:
 
         # Mock empty institutions response for invalid country
         respx.get("https://bankaccountdata.gocardless.com/api/v2/institutions/").mock(
-            return_value=httpx.Response(200, json=[])
+            return_value=httpx.Response(200, json={"results": []})
         )
 
         with patch("leggen.utils.config.config", mock_config):

tests/unit/test_api_client.py

@@ -37,9 +37,12 @@ class TestLeggenAPIClient:
         """Test getting institutions via API client."""
         client = LeggenAPIClient("http://localhost:8000")
 
+        # The API returns processed institutions, not raw GoCardless data
+        processed_institutions = sample_bank_data["results"]
+
         api_response = {
             "success": True,
-            "data": sample_bank_data,
+            "data": processed_institutions,
             "message": "Found 2 institutions for PT",
         }