feat(tests): add comprehensive error scenario coverage

- Created 36 new error scenario tests covering configuration validation, network failures, and edge cases
- Added configuration error testing for invalid settings, empty values, and malformed configurations
- Implemented network error scenario testing including timeouts, connection failures, and HTTP errors
- Added subprocess execution error testing for CLI failures, permission errors, and process management
- Created file system error scenario testing for permission issues, disk space problems, and path handling
- Added concurrency and race condition testing for ProcessManager and version caching
- Implemented edge case testing for Unicode paths, extremely long paths, and zero-byte downloads
- Enhanced error handling validation across all management commands and utility functions
- Fixed config tests to properly clear cache and mock network requests for consistent fallback behavior
- Improved test coverage to 89% with comprehensive error scenario validation

Author: oliverandrich

CHANGELOG.md

@@ -48,6 +48,17 @@
   - Implemented verbose logging integration tests across all management commands
   - Enhanced test coverage to 87% with comprehensive workflow validation
   - Fixed coverage configuration issues to ensure consistent test reporting
+- Added comprehensive error scenario coverage for enhanced reliability and robustness.
+  - Created 36 new error scenario tests covering configuration validation, network failures, and edge cases
+  - Added configuration error testing for invalid settings, empty values, and malformed configurations
+  - Implemented network error scenario testing including timeouts, connection failures, and HTTP errors
+  - Added subprocess execution error testing for CLI failures, permission errors, and process management
+  - Created file system error scenario testing for permission issues, disk space problems, and path handling
+  - Added concurrency and race condition testing for ProcessManager and version caching
+  - Implemented edge case testing for Unicode paths, extremely long paths, and zero-byte downloads
+  - Enhanced error handling validation across all management commands and utility functions
+  - Fixed config tests to properly clear cache and mock network requests for consistent fallback behavior
+  - Improved test coverage to 89% with comprehensive error scenario validation
 
 ## 4.2.4
 

tests/test_config.py

@@ -26,9 +26,22 @@ def configure_settings(
     ],
 )
 def test_get_version(
-    settings: SettingsWrapper, version_str: str, expected_version_str: str, version: tuple[int, int, int]
+    settings: SettingsWrapper, version_str: str, expected_version_str: str, version: tuple[int, int, int], mocker: MockerFixture
 ):
     settings.TAILWIND_CLI_VERSION = version_str
+    
+    # For "latest" version test, mock the network request to ensure fallback
+    if version_str == "latest":
+        # Clear any existing cache
+        from django_tailwind_cli.config import _get_cache_path
+        cache_path = _get_cache_path()
+        if cache_path.exists():
+            cache_path.unlink()
+        
+        # Mock failed network request to force fallback
+        request_get = mocker.patch("requests.get")
+        request_get.return_value.ok = False
+    
     r_version_str, r_version = get_version()
     assert r_version_str == expected_version_str
     assert r_version.major == version[0]
@@ -37,6 +50,12 @@ def test_get_version(
 
 
 def test_get_version_latest_without_proper_http_response(mocker: MockerFixture):
+    # Clear any existing cache
+    from django_tailwind_cli.config import _get_cache_path
+    cache_path = _get_cache_path()
+    if cache_path.exists():
+        cache_path.unlink()
+    
     request_get = mocker.patch("requests.get")
     request_get.return_value.ok = False
 
@@ -48,6 +67,12 @@ def test_get_version_latest_without_proper_http_response(mocker: MockerFixture):
 
 
 def test_get_version_latest_without_redirect(mocker: MockerFixture):
+    # Clear any existing cache
+    from django_tailwind_cli.config import _get_cache_path
+    cache_path = _get_cache_path()
+    if cache_path.exists():
+        cache_path.unlink()
+    
     request_get = mocker.patch("requests.get")
     request_get.return_value.headers = {}