lint-changed/test/runScript.spec.js

Lint files changed in git

/* eslint no-underscore-dangle: 0 */

import expect from 'expect'
import isPromise from 'is-promise'
import mockFn from 'execa'
import runScript from '../src/runScript'

jest.mock('execa')

expect.extend({
    toBeAPromise() {
        expect.assert(
            isPromise(this.actual),
            'expected %s to be a Promise',
            this.actual
        )
        return this
    }
})

const packageJSON = {
    scripts: {
        test: 'noop',
        test2: 'noop'
    },
    'lint-changed': {}
}

describe('runScript', () => {

    beforeEach(() => {
        mockFn.mockReset()
    })

    it('should return an array', () => {
        expect(runScript('test', 'test.js', packageJSON)).toBeA('array')
    })

    it('should throw for non-existend script', () => {
        expect(() => {
            runScript('missing-module', 'test.js', packageJSON)[0].task()
        }).toThrow()
    })

    it('should work with a single command', () => {
        const res = runScript('test', 'test.js', packageJSON)
        expect(res.length).toBe(1)
        expect(res[0].title).toBe('test')
        expect(res[0].task).toBeA('function')
        expect(res[0].task()).toBeAPromise()
    })

    it('should work with multiple commands', () => {
        const res = runScript(['test', 'test2'], 'test.js', packageJSON)
        expect(res.length).toBe(2)
        expect(res[0].title).toBe('test')
        expect(res[1].title).toBe('test2')

        expect(res[0].task()).toBeAPromise()
        expect(mockFn.mock.calls.length).toEqual(1)
        expect(mockFn.mock.calls[0]).toEqual(
            ['npm', ['run', '--silent', 'test', '--', 'test.js'], {}]
        )
        expect(res[1].task()).toBeAPromise()
        expect(mockFn.mock.calls.length).toEqual(2)
        expect(mockFn.mock.calls[1]).toEqual(
            ['npm', ['run', '--silent', 'test2', '--', 'test.js'], {}]
        )
    })

    it('should support non npm scripts', () => {
        const res = runScript(['node --arg=true ./myscript.js', 'git add'], 'test.js', packageJSON)
        expect(res.length).toBe(2)
        expect(res[0].title).toBe('node --arg=true ./myscript.js')
        expect(res[1].title).toBe('git add')

        expect(res[0].task()).toBeAPromise()
        expect(mockFn.mock.calls.length).toEqual(1)
        expect(mockFn.mock.calls[0][0]).toContain('node')
        expect(mockFn.mock.calls[0][1]).toEqual(['--arg=true', './myscript.js', '--', 'test.js'])

        expect(res[1].task()).toBeAPromise()
        expect(mockFn.mock.calls.length).toEqual(2)
        expect(mockFn.mock.calls[1][0]).toContain('git')
        expect(mockFn.mock.calls[1][1]).toEqual(['add', '--', 'test.js'])
    })

    it('should pass cwd to execa if gitDir option is set for non-npm tasks', () => {
        const res = runScript(
            ['test', 'git add'],
            'test.js',
            packageJSON,
            { gitDir: '../' }
        )
        expect(res[0].task()).toBeAPromise()
        expect(mockFn.mock.calls.length).toEqual(1)
        expect(mockFn.mock.calls[0]).toEqual(
            ['npm', ['run', '--silent', 'test', '--', 'test.js'], {}]
        )

        expect(res[1].task()).toBeAPromise()
        expect(mockFn.mock.calls.length).toEqual(2)
        expect(mockFn.mock.calls[1][0]).toMatch(/git$/)
        expect(mockFn.mock.calls[1][1]).toEqual(['add', '--', 'test.js'])
        expect(mockFn.mock.calls[1][2]).toEqual({ cwd: '../' })
    })

    it('should use --silent in non-verbose mode', () => {
        const res = runScript(
            'test',
            'test.js',
            packageJSON,
            { verbose: false }
        )
        expect(res[0].task()).toBeAPromise()
        expect(mockFn.mock.calls.length).toEqual(1)
        expect(mockFn.mock.calls[0]).toEqual(
            ['npm', ['run', '--silent', 'test', '--', 'test.js'], {}]
        )
    })

    it('should not use --silent in verbose mode', () => {
        const res = runScript(
            'test',
            'test.js',
            packageJSON,
            { verbose: true }
        )
        expect(res[0].task()).toBeAPromise()
        expect(mockFn.mock.calls.length).toEqual(1)
        expect(mockFn.mock.calls[0]).toEqual(
            ['npm', ['run', 'test', '--', 'test.js'], {}]
        )
    })
})