feat: add tests for check markdown script

scripts/markdown/check-markdown.js

@@ -1,4 +1,4 @@
-const fs = require('fs');
+const fs = require('fs').promises;
 const matter = require('gray-matter');
 const path = require('path');
 
@@ -98,14 +98,10 @@ function validateDocs(frontmatter) {
  * @param {Function} validateFunction - The function used to validate the frontmatter.
  * @param {string} [relativePath=''] - The relative path of the folder for logging purposes.
  */
-function checkMarkdownFiles(folderPath, validateFunction, relativePath = '') {
-    fs.readdir(folderPath, (err, files) => {
-        if (err) {
-            console.error('Error reading directory:', err);
-            return;
-        }
-
-        files.forEach(file => {
+async function checkMarkdownFiles(folderPath, validateFunction, relativePath = '') {
+    try {
+        const files = await fs.readdir(folderPath);
+        const filePromises = files.map(async (file) => {
             const filePath = path.join(folderPath, file);
             const relativeFilePath = path.join(relativePath, file);
 
@@ -114,17 +110,14 @@ function checkMarkdownFiles(folderPath, validateFunction, relativePath = '') {
                 return;
             }
 
-            fs.stat(filePath, (err, stats) => {
-                if (err) {
-                    console.error('Error reading file stats:', err);
-                    return;
-                }
+            try {
+                const stats = await fs.stat(filePath);
 
                 // Recurse if directory, otherwise validate markdown file
                 if (stats.isDirectory()) {
-                    checkMarkdownFiles(filePath, validateFunction, relativeFilePath);
+                    await checkMarkdownFiles(filePath, validateFunction, relativeFilePath);
                 } else if (path.extname(file) === '.md') {
-                    const fileContent = fs.readFileSync(filePath, 'utf-8');
+                    const fileContent = await fs.readFile(filePath, 'utf-8');
                     const { data: frontmatter } = matter(fileContent);
 
                     const errors = validateFunction(frontmatter);
@@ -134,13 +127,37 @@ function checkMarkdownFiles(folderPath, validateFunction, relativePath = '') {
                         process.exitCode = 1;
                     }
                 }
-            });
+            } catch (err) {
+                console.error(`Error processing file ${relativeFilePath}:`, err);
+                throw err;
+            }
         });
-    });
+
+        await Promise.all(filePromises);
+    } catch (err) {
+        console.error(`Error in directory ${folderPath}:`, err);
+        throw err;
+    }
 }
 
 const docsFolderPath = path.resolve(__dirname, '../../markdown/docs');
 const blogsFolderPath = path.resolve(__dirname, '../../markdown/blog');
 
-checkMarkdownFiles(docsFolderPath, validateDocs);
-checkMarkdownFiles(blogsFolderPath, validateBlogs);
+async function main() {
+    try {
+        await Promise.all([
+            checkMarkdownFiles(docsFolderPath, validateDocs),
+            checkMarkdownFiles(blogsFolderPath, validateBlogs)
+        ]);
+    } catch (error) {
+        console.error('Failed to validate markdown files:', error);
+        process.exit(1);
+    }
+}
+
+/* istanbul ignore next */
+if (require.main === module) {
+    main();
+}
+
+module.exports = { validateBlogs, validateDocs, checkMarkdownFiles, main, isValidURL }

tests/markdown/check-markdown.test.js

@@ -0,0 +1,150 @@
+const fs = require('fs').promises;
+const path = require('path');
+const os = require('os');
+const {
+    isValidURL,
+    main,
+    validateBlogs,
+    validateDocs,
+    checkMarkdownFiles
+} = require('../../scripts/markdown/check-markdown');
+
+describe('Frontmatter Validator', () => {
+    let tempDir;
+    let mockConsoleError;
+    let mockProcessExit;
+
+    beforeEach(async () => {
+        mockConsoleError = jest.spyOn(console, 'error').mockImplementation();
+        mockProcessExit = jest.spyOn(process, 'exit').mockImplementation();
+        tempDir = await fs.mkdtemp(path.join(os.tmpdir(), 'test-config'));
+    });
+
+    afterEach(async () => {
+        mockConsoleError.mockRestore();
+        mockProcessExit.mockRestore();
+        await fs.rm(tempDir, { recursive: true, force: true });
+    });
+
+    it('validates authors array and returns specific errors', async () => {
+        const frontmatter = {
+            title: 'Test Blog',
+            date: '2024-01-01',
+            type: 'blog',
+            tags: ['test'],
+            cover: 'cover.jpg',
+            authors: [{ name: 'John' }, { photo: 'jane.jpg' }, { name: 'Bob', photo: 'bob.jpg', link: 'not-a-url' }]
+        };
+
+        const errors = validateBlogs(frontmatter);
+        expect(errors).toEqual(expect.arrayContaining([
+            'Author at index 0 is missing a photo',
+            'Author at index 1 is missing a name',
+            'Invalid URL for author at index 2: not-a-url'
+        ]));
+    });
+
+    it('validates docs frontmatter for required fields', async () => {
+        const frontmatter = { title: 123, weight: 'not-a-number' };
+        const errors = validateDocs(frontmatter);
+        expect(errors).toEqual(expect.arrayContaining([
+            'Title is missing or not a string',
+            'Weight is missing or not a number'
+        ]));
+    });
+
+    it('checks for errors in markdown files in a directory', async () => {
+        await fs.writeFile(path.join(tempDir, 'invalid.md'), `---\ntitle: Invalid Blog\n---`);
+        const mockConsoleLog = jest.spyOn(console, 'log').mockImplementation();
+
+        await checkMarkdownFiles(tempDir, validateBlogs);
+
+        expect(mockConsoleLog).toHaveBeenCalledWith(expect.stringContaining('Errors in file invalid.md:'));
+        mockConsoleLog.mockRestore();
+    });
+
+    it('returns multiple validation errors for invalid blog frontmatter', async () => {
+        const frontmatter = {
+            title: 123,
+            date: 'invalid-date',
+            type: 'blog',
+            tags: 'not-an-array',
+            cover: ['not-a-string'],
+            authors: { name: 'John Doe' }
+        };
+        const errors = validateBlogs(frontmatter);
+
+        expect(errors).toEqual([
+            "Invalid date format: invalid-date",
+            "Tags should be an array",
+            "Cover must be a string",
+            "Authors should be an array"]);
+    });
+
+    it('logs error to console when an error occurs in checkMarkdownFiles', async () => {
+        const invalidFolderPath = path.join(tempDir, 'non-existent-folder');
+
+        await expect(checkMarkdownFiles(invalidFolderPath, validateBlogs))
+            .rejects.toThrow('ENOENT');
+
+        expect(mockConsoleError.mock.calls[0][0]).toContain('Error in directory');
+    });
+
+    it('skips the "reference/specification" folder during validation', async () => {
+        const referenceSpecDir = path.join(tempDir, 'reference', 'specification');
+        await fs.mkdir(referenceSpecDir, { recursive: true });
+        await fs.writeFile(path.join(referenceSpecDir, 'skipped.md'), `---\ntitle: Skipped File\n---`);
+
+        const mockConsoleLog = jest.spyOn(console, 'log').mockImplementation();
+
+        await checkMarkdownFiles(tempDir, validateDocs);
+
+        expect(mockConsoleLog).not.toHaveBeenCalledWith(expect.stringContaining('Errors in file reference/specification/skipped.md'));
+        mockConsoleLog.mockRestore();
+    });
+
+    it('logs and rejects when an exception occurs while processing a file', async () => {
+        const filePath = path.join(tempDir, 'invalid.md');
+        await fs.writeFile(filePath, `---\ntitle: Valid Title\n---`);
+
+        const mockReadFile = jest.spyOn(fs, 'readFile').mockRejectedValue(new Error('Test readFile error'));
+
+        await expect(checkMarkdownFiles(tempDir, validateBlogs)).rejects.toThrow('Test readFile error');
+        expect(mockConsoleError).toHaveBeenCalledWith(
+            expect.stringContaining(`Error processing file invalid.md:`),
+            expect.any(Error)
+        );
+
+        mockReadFile.mockRestore();
+    });
+
+    it('should handle main function errors and exit with status 1', async () => {
+        jest.spyOn(fs, 'readdir').mockRejectedValue(new Error('Test error'));
+
+        await main();
+
+        expect(mockProcessExit).toHaveBeenCalledWith(1);
+
+        expect(mockConsoleError).toHaveBeenCalledWith(
+            'Failed to validate markdown files:',
+            expect.any(Error)
+        );
+    });
+
+    it('should handle successful main function execution', async () => {
+
+        await main();
+
+        expect(mockConsoleError).not.toHaveBeenCalledWith()
+    });
+
+    it('should return true or false for URLs', () => {
+        expect(isValidURL('http://example.com')).toBe(true);
+        expect(isValidURL('https://www.example.com')).toBe(true);
+        expect(isValidURL('ftp://ftp.example.com')).toBe(true);
+        expect(isValidURL('invalid-url')).toBe(false);
+        expect(isValidURL('/path/to/file')).toBe(false);
+        expect(isValidURL('www.example.com')).toBe(false);
+    });
+
+});