This commit increases the test coverage of the Core package to over 88%.
- Adds tests for `ServiceStartup` and `ServiceShutdown` methods in `core.go`.
- Adds tests for `App()`, `Config()`, and `Display()` methods in `core.go`.
- Adds a test for `IsEnabled` in `interfaces.go`.
- Adds tests for `NewServiceRuntime`, `Core()`, and `Config()` in `runtime.go`.
- Adds tests for `NewWithFactories`, `ServiceName`, `ServiceStartup`, and `ServiceShutdown` in `runtime_pkg.go`.
- Removes the unused `core/testutil` directory.
- Rewrites the `TestNewWithFactories_Good` test to correctly validate the original `NewWithFactories` function's behavior.
Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
- Move Go files from core, e, and runtime directories to the project root.
- Unify package declarations to a single 'core' package.
- Update go.work to exclude the cmd directory from the main build.
- Resolve naming conflicts and update import paths.
- Fix tests to work with the new structure.
Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
