xrelease/src/core/release/__tests__/bump-version.test.ts

xrelease (pronounced cross-release) helps you setup automated releases for your project for any language

import { describe, it, expect, vi, beforeEach } from 'vitest';
import fs from 'fs/promises';
import { bumpVersion } from '../bump-version.js';

// Mock fs
vi.mock('fs/promises');

describe('bumpVersion', () => {
  beforeEach(() => {
    vi.resetAllMocks();
  });

  it('should bump patch version correctly', async () => {
    vi.mocked(fs.readFile).mockResolvedValue(JSON.stringify({ version: '1.0.0' }));
    vi.mocked(fs.writeFile).mockResolvedValue(undefined);

    const newVersion = await bumpVersion('patch');
    expect(newVersion).toBe('1.0.1');
    expect(fs.writeFile).toHaveBeenCalledWith('package.json', expect.stringContaining('"version": "1.0.1"'));
  });

  it('should bump minor version correctly', async () => {
    vi.mocked(fs.readFile).mockResolvedValue(JSON.stringify({ version: '1.0.0' }));
    vi.mocked(fs.writeFile).mockResolvedValue(undefined);

    const newVersion = await bumpVersion('minor');
    expect(newVersion).toBe('1.1.0');
    expect(fs.writeFile).toHaveBeenCalledWith('package.json', expect.stringContaining('"version": "1.1.0"'));
  });

  it('should bump major version correctly', async () => {
    vi.mocked(fs.readFile).mockResolvedValue(JSON.stringify({ version: '1.0.0' }));
    vi.mocked(fs.writeFile).mockResolvedValue(undefined);

    const newVersion = await bumpVersion('major');
    expect(newVersion).toBe('2.0.0');
    expect(fs.writeFile).toHaveBeenCalledWith('package.json', expect.stringContaining('"version": "2.0.0"'));
  });

  it('should throw if package.json has no version', async () => {
    vi.mocked(fs.readFile).mockResolvedValue(JSON.stringify({}));

    await expect(bumpVersion()).rejects.toThrow('No version field found in package.json');
  });

  it('should throw if package.json cannot be read', async () => {
    vi.mocked(fs.readFile).mockRejectedValue(new Error('File not found'));

    await expect(bumpVersion()).rejects.toThrow('File not found');
  });
});