Relevant source files

The following files were used as context for generating this wiki page: - [package.json](https://github.com/djanni974/TAF-SAF/blob/main/package.json) - [README.md](https://github.com/djanni974/TAF-SAF/blob/main/README.md) - [tsconfig.json](https://github.com/djanni974/TAF-SAF/blob/main/tsconfig.json) - [src/app/page.tsx](https://github.com/djanni974/TAF-SAF/blob/main/src/app/page.tsx) - [src/app/layout.tsx](https://github.com/djanni974/TAF-SAF/blob/main/src/app/layout.tsx) - [next.config.ts](https://github.com/djanni974/TAF-SAF/blob/main/next.config.ts) - [src/app/globals.css](https://github.com/djanni974/TAF-SAF/blob/main/src/app/globals.css)

# Unit Testing (Future) This document analyzes the current state of the TAF-SAF project regarding unit testing. Based on the project's source files, there is currently no unit testing framework, configuration, or test suite implemented. This page outlines the existing project structure and identifies key components that are candidates for future testing efforts. The project is a standard Next.js application bootstrapped with `create-next-app`, utilizing React and TypeScript. The focus of this analysis is to lay the groundwork for introducing a robust testing strategy by examining the current codebase for testability. Sources: [README.md](), [package.json]() ## 1. Project Dependencies and Scripts An analysis of the `package.json` file reveals the core dependencies of the project. Notably, there are no testing-specific libraries (e.g., Jest, Vitest, React Testing Library, Cypress) included in either `dependencies` or `devDependencies`. Sources: [package.json:10-25]() ### 1.1. Dependencies The project relies on the following core libraries for its functionality: | Package | Version | Type | Description | | :-------- | :------ | :----------- | :---------------------------------------- | | `next` | 15.3.2 | Dependency | The React framework for production. | | `react` | ^19.0.0 | Dependency | A JavaScript library for building UIs. | | `react-dom` | ^19.0.0 | Dependency | Serves as the entry point to the DOM. | | `typescript`| ^5 | DevDependency| Superset of JavaScript that adds typing. | | `@types/*` | ^19, ^20| DevDependency| Type definitions for React, Node, etc. | | `tailwindcss`| ^4 | DevDependency| A utility-first CSS framework. | Sources: [package.json:10-25]() ### 1.2. NPM Scripts The available scripts are for development, building, and linting. The absence of a `test` script further confirms that a testing workflow is not yet configured. | Script | Command | Description | | :------ | :------------------ | :---------------------------------------- | | `dev` | `next dev --turbopack` | Starts the development server with Turbopack. | | `build` | `next build` | Creates an optimized production build. | | `start` | `next start` | Starts the production server. | | `lint` | `next lint` | Runs the Next.js linter. | Sources: [package.json:5-9]() This diagram illustrates the current build and development process, highlighting the missing test step. ```mermaid graph TD subgraph "Current Workflow" A[npm run dev] --> B{Development Server} C[npm run build] --> D[Production Build] D --> E[npm run start] F[npm run lint] --> G{Code Linting} end subgraph "Future State" H(npm test) end style H fill:#f9f,stroke:#333,stroke-width:2px ``` Sources: [package.json:5-9]() ## 2. TypeScript Configuration The `tsconfig.json` file is configured for a standard Next.js project. The settings here provide a solid foundation for writing type-safe code, which will be beneficial when unit tests are introduced. ### 2.1. Key Compiler Options - `"strict": true`: Enforces strict type-checking rules. This is crucial for catching potential errors early and writing reliable tests. - `"jsx": "preserve"`: Preserves JSX for another transform step (like Next.js's compiler), which is standard for this stack. - `"noEmit": true`: Prevents the TypeScript compiler from outputting JavaScript files, as Next.js handles the compilation. - `"paths": { "@/*": ["./src/*"] }`: Defines a path alias for easier imports, which will need to be configured in any future testing framework. While the configuration is robust for development, it lacks any test-specific settings, such as `types` for a testing framework or `exclude` patterns for test files. Sources: [tsconfig.json:2-22]() ## 3. Component Analysis for Testability The primary candidates for initial unit and component tests are the React components located in the `src/app/` directory. ### 3.1. Root Layout (`src/app/layout.tsx`) The `RootLayout` component is responsible for the main HTML structure of the application, including applying global fonts and styles. **Test Cases for `RootLayout`:** - Verify that it renders its `children` prop without errors. - Check that the `html` tag has the `lang="en"` attribute. - Confirm that the `body` tag includes the CSS variable classes for the `Geist` and `Geist_Mono` fonts. This diagram shows the structure of the `RootLayout` component. ```mermaid classDiagram class RootLayout { +children: React.ReactNode +metadata: Metadata +render() } class Metadata { +title: string +description: string } RootLayout --> Metadata : has ``` Sources: [src/app/layout.tsx]() ### 3.2. Home Page (`src/app/page.tsx`) The `Home` component is the main entry page of the application. It is a server component that renders static content, images, and links. **Test Cases for `Home`:** - Ensure the component renders without crashing. - Verify that the "Next.js logo" and "Vercel logomark" `Image` components are present and have the correct `alt` text. - Check that the "Deploy now" and "Read our docs" links (`` tags) have the correct `href` attributes and `target="_blank"`. - Confirm the presence of the ordered list with instructions. This flowchart shows the rendering logic of the `Home` component. ```mermaid flowchart TD A[Render Home Component] --> B{Render main container div} B --> C[Render Next.js Image] B --> D[Render instruction list] B --> E[Render link buttons div] E --> F[Render 'Deploy now' link] E --> G[Render 'Read our docs' link] B --> H[Render footer] ``` Sources: [src/app/page.tsx]() ## 4. Proposed Path Forward To introduce unit testing, the following steps would be necessary: 1. **Select and Install a Test Runner:** Choose a framework like Jest or Vitest and add it to `devDependencies` in `package.json`. 2. **Install Testing Libraries:** Add `react-testing-library` to simulate user interactions and test component outputs. 3. **Configure the Test Environment:** - Create a configuration file (e.g., `jest.config.ts`). - Configure path mappings (`@/*`) to match `tsconfig.json`. - Set up the environment to handle CSS and image imports. 4. **Add a `test` Script:** Add a `"test": "jest"` or `"test": "vitest"` script to `package.json`. 5. **Write Initial Tests:** Create test files (e.g., `src/app/page.test.tsx`) and implement the test cases outlined in the section above. This sequence diagram illustrates a hypothetical test run for the `Home` component. ```mermaid sequenceDiagram participant Developer participant TestRunner as "Test Runner (e.g., Jest)" participant RTL as "React Testing Library" participant HomeComponent as "Home Component" Developer->>TestRunner: Runs 'npm test' TestRunner->>RTL: render(<Home />) RTL->>HomeComponent: Renders component HomeComponent-->>RTL: Returns virtual DOM RTL-->>TestRunner: Component is rendered TestRunner->>RTL: screen.getByAltText('Next.js logo') RTL-->>TestRunner: Returns element Note over TestRunner: Assertion passes ``` ## Summary The TAF-SAF project is currently in its initial phase, without any implemented unit or component testing infrastructure. The project's foundation on Next.js, React, and TypeScript is solid and well-suited for adding a testing layer. The primary components, `RootLayout` and `Home`, are clearly defined and serve as excellent first candidates for testing. The immediate next step should be the selection and integration of a testing framework to ensure the application's quality and maintainability as it evolves. Sources: [README.md](), [package.json](), [src/app/page.tsx](), [src/app/layout.tsx]()