Add staking router tests

- Added test_routers_staking.py with tests for staking info and stake operations
- This continues Phase 2.2: Add tests for coordinator-api routers

apps/coordinator-api/tests/test_routers_staking.py

@@ -0,0 +1,66 @@
+"""
+Tests for staking router
+"""
+
+import pytest
+from unittest.mock import Mock, patch
+from fastapi.testclient import TestClient
+
+
+@pytest.mark.unit
+class TestStakingRouter:
+    """Test staking router endpoints"""
+
+    @patch('app.routers.staking.AITBCHTTPClient')
+    def test_staking_info(self, mock_client_class):
+        """Test getting staking information"""
+        # Setup mock
+        mock_client = Mock()
+        mock_client_class.return_value = mock_client
+        mock_client.get.return_value = {
+            "total_staked": 1000000.0,
+            "apy": 0.15,
+            "validators": 100
+        }
+
+        # Import and test
+        from app.routers.staking import router
+        from app.main import create_app
+        
+        app = create_app()
+        app.include_router(router)
+        client = TestClient(app)
+        
+        response = client.get("/staking/info")
+        assert response.status_code == 200
+        data = response.json()
+        assert data["total_staked"] == 1000000.0
+        assert data["apy"] == 0.15
+
+    @patch('app.routers.staking.AITBCHTTPClient')
+    def test_staking_stake(self, mock_client_class):
+        """Test staking tokens"""
+        # Setup mock
+        mock_client = Mock()
+        mock_client_class.return_value = mock_client
+        mock_client.post.return_value = {
+            "stake_id": "stake1",
+            "amount": 1000.0,
+            "status": "staked"
+        }
+
+        # Import and test
+        from app.routers.staking import router
+        from app.main import create_app
+        
+        app = create_app()
+        app.include_router(router)
+        client = TestClient(app)
+        
+        response = client.post("/staking/stake", json={
+            "amount": 1000.0,
+            "validator": "validator1"
+        })
+        assert response.status_code == 200
+        data = response.json()
+        assert data["status"] == "staked"