add additional tets for code coverage

Author: yiyuan-he

src/cloudwatch-appsignals-mcp-server/tests/test_enablement_tools.py

@@ -134,3 +134,68 @@ async def test_unsupported_platform_k8s(self):
         assert 'Enablement guide not available' in result
         assert 'k8s' in result.lower()
         assert 'not currently supported' in result
+
+    @pytest.mark.asyncio
+    async def test_case_insensitive_platform(self):
+        """Test that uppercase platform names are normalized to lowercase."""
+        result = await get_enablement_guide(
+            service_platform='EC2',
+            service_language='python',
+            iac_directory=ABSOLUTE_PATHS['iac'],
+            app_directory=ABSOLUTE_PATHS['app'],
+        )
+
+        # Should work the same as lowercase
+        assert 'Error: iac_directory and app_directory must be absolute paths' not in result
+        assert (
+            '# Application Signals Enablement Guide' in result
+            or 'Enablement guide not available' in result
+        )
+
+    @pytest.mark.asyncio
+    async def test_case_insensitive_language(self):
+        """Test that uppercase language names are normalized to lowercase."""
+        result = await get_enablement_guide(
+            service_platform='ec2',
+            service_language='PYTHON',
+            iac_directory=ABSOLUTE_PATHS['iac'],
+            app_directory=ABSOLUTE_PATHS['app'],
+        )
+
+        # Should work the same as lowercase
+        assert 'Error: iac_directory and app_directory must be absolute paths' not in result
+        assert (
+            '# Application Signals Enablement Guide' in result
+            or 'Enablement guide not available' in result
+        )
+
+    @pytest.mark.asyncio
+    async def test_whitespace_trimming(self):
+        """Test that leading/trailing whitespace is trimmed from inputs."""
+        result = await get_enablement_guide(
+            service_platform='  ec2  ',
+            service_language='  python  ',
+            iac_directory=ABSOLUTE_PATHS['iac'],
+            app_directory=ABSOLUTE_PATHS['app'],
+        )
+
+        # Should work the same as trimmed input
+        assert 'Error: iac_directory and app_directory must be absolute paths' not in result
+        assert (
+            '# Application Signals Enablement Guide' in result
+            or 'Enablement guide not available' in result
+        )
+
+    @pytest.mark.asyncio
+    async def test_both_paths_relative(self):
+        """Test that error message shows both paths when both are relative."""
+        result = await get_enablement_guide(
+            service_platform='ec2',
+            service_language='python',
+            iac_directory='infrastructure/cdk',
+            app_directory='app/src',
+        )
+
+        assert 'Error: iac_directory and app_directory must be absolute paths' in result
+        assert 'infrastructure/cdk' in result
+        assert 'app/src' in result