'use strict'

const { expect } = require('chai')
const path = require('path')
const os = require('os')
const fsp = require('fs').promises
const fse = require('fs-extra')

describe('test/unit/lib/cli/local-serverless.test.js', () => {
  beforeEach(() => {
    delete require.cache[
      require.resolve('../../../../lib/cli/local-serverless-path')
    ]
  })

  it('should resolve with `null` when no local installation is found', () => {
    expect(require('../../../../lib/cli/local-serverless-path')).to.equal(null)
  })

  it('should resolve with `null` when no local installation is found', async () => {
    const tmpServerlessPath = path.resolve(
      await fsp.realpath(os.homedir()),
      'node_modules/serverless',
    )
    await fse.ensureDir(path.resolve(tmpServerlessPath, 'lib'))
    await Promise.all([
      fse.ensureFile(path.resolve(tmpServerlessPath, 'lib/serverless.js')),
      fsp.writeFile(
        path.resolve(tmpServerlessPath, 'package.json'),
        JSON.stringify({ main: 'lib/serverless.js' }),
      ),
    ])
    expect(
      await fsp.realpath(require('../../../../lib/cli/local-serverless-path')),
    ).to.equal(tmpServerlessPath)
  })
})