patch-pulse/lib/services/tests/package.test.js

Check for outdated npm dependencies

import { existsSync, readFileSync } from 'fs';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { readPackageJson } from '../package.js';
// Mock fs module
vi.mock('fs', () => ({
    existsSync: vi.fn(),
    readFileSync: vi.fn(),
}));
describe('readPackageJson', () => {
    beforeEach(() => {
        vi.clearAllMocks();
    });
    afterEach(() => {
        vi.restoreAllMocks();
    });
    it('should read and parse valid package.json', async () => {
        const mockPackageJson = {
            name: 'test-package',
            version: '1.0.0',
            dependencies: { chalk: '^5.0.0' },
        };
        vi.mocked(existsSync).mockReturnValue(true);
        vi.mocked(readFileSync).mockReturnValue(JSON.stringify(mockPackageJson));
        const result = await readPackageJson('/path/to/package.json');
        expect(result).toEqual(mockPackageJson);
        expect(existsSync).toHaveBeenCalledWith('/path/to/package.json');
        expect(readFileSync).toHaveBeenCalledWith('/path/to/package.json', 'utf-8');
    });
    it('should throw error when file does not exist', async () => {
        vi.mocked(existsSync).mockReturnValue(false);
        await expect(readPackageJson('/nonexistent/package.json')).rejects.toThrow('package.json not found at /nonexistent/package.json');
    });
    it('should throw error for invalid JSON', async () => {
        vi.mocked(existsSync).mockReturnValue(true);
        vi.mocked(readFileSync).mockReturnValue('invalid json');
        await expect(readPackageJson('/path/to/package.json')).rejects.toThrow('Invalid JSON in package.json:');
    });
    it('should throw error for non-object JSON', async () => {
        vi.mocked(existsSync).mockReturnValue(true);
        vi.mocked(readFileSync).mockReturnValue('"string"');
        await expect(readPackageJson('/path/to/package.json')).rejects.toThrow('package.json must be a valid JSON object');
    });
    it('should throw error for null JSON', async () => {
        vi.mocked(existsSync).mockReturnValue(true);
        vi.mocked(readFileSync).mockReturnValue('null');
        await expect(readPackageJson('/path/to/package.json')).rejects.toThrow('package.json must be a valid JSON object');
    });
});
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