Add staking service tests

- Added test_services_staking.py with tests for staking info and stake operations
- This continues Phase 2.3: Add tests for core services

apps/coordinator-api/tests/test_services_staking.py

@@ -0,0 +1,48 @@
+"""
+Tests for staking service
+"""
+
+import pytest
+from unittest.mock import Mock, patch
+
+
+@pytest.mark.unit
+class TestStakingService:
+    """Test staking service"""
+
+    @patch('app.services.staking_service.AITBCHTTPClient')
+    def test_get_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.services.staking_service import get_staking_info
+        
+        result = get_staking_info()
+        assert result["total_staked"] == 1000000.0
+        assert result["apy"] == 0.15
+
+    @patch('app.services.staking_service.AITBCHTTPClient')
+    def test_stake_tokens(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.services.staking_service import stake_tokens
+        
+        result = stake_tokens({"amount": 1000.0, "validator": "validator1"})
+        assert result["status"] == "staked"