Add integration test for blockchain-payments interaction

- Added test_integration_blockchain_payments.py with test for payment recording on blockchain
- This continues Phase 2.4: Add integration tests

apps/coordinator-api/tests/test_integration_blockchain_payments.py

@@ -0,0 +1,60 @@
+"""
+Integration tests for blockchain and payments interaction
+"""
+
+import pytest
+from unittest.mock import Mock, patch
+from fastapi.testclient import TestClient
+
+
+@pytest.mark.integration
+class TestBlockchainPaymentsIntegration:
+    """Test integration between blockchain and payment services"""
+
+    @patch('app.routers.blockchain.AITBCHTTPClient')
+    @patch('app.routers.payments.AITBCHTTPClient')
+    def test_payment_recorded_on_blockchain(self, mock_payments_client, mock_blockchain_client):
+        """Test that a payment is recorded on the blockchain"""
+        # Setup mocks
+        mock_blockchain = Mock()
+        mock_blockchain_client.return_value = mock_blockchain
+        mock_blockchain.get.return_value = {
+            "height": 1000,
+            "hash": "0xabc123",
+            "tx_count": 50
+        }
+
+        mock_payments = Mock()
+        mock_payments_client.return_value = mock_payments
+        mock_payments.post.return_value = {
+            "id": "payment1",
+            "amount": 100.0,
+            "status": "pending",
+            "transaction_hash": "0xdef456"
+        }
+
+        # Import and test
+        from app.routers.blockchain import router as blockchain_router
+        from app.routers.payments import router as payments_router
+        from app.main import create_app
+        
+        app = create_app()
+        app.include_router(blockchain_router)
+        app.include_router(payments_router)
+        client = TestClient(app)
+        
+        # Create payment
+        response = client.post("/payments", json={
+            "amount": 100.0,
+            "currency": "USDC",
+            "recipient": "wallet123"
+        })
+        assert response.status_code == 200
+        payment_data = response.json()
+        assert payment_data["transaction_hash"] == "0xdef456"
+        
+        # Verify blockchain is accessible
+        response = client.get("/blockchain/status")
+        assert response.status_code == 200
+        blockchain_data = response.json()
+        assert blockchain_data["height"] == 1000