@toptal/davinci-qa/src/utils/styled-components-version-check.test.js

QA package to test your application

/* eslint jest/expect-expect: ["error", { "assertFunctionNames": ["expect", "errorTest", "successTest"] }] */
import styledComponentsVersionCheck from './styled-components-version-check.js'

const successTest = (styledComponentsVersion, dependenciesKeys) => {
  const packageJson = {}

  dependenciesKeys.forEach(dependenciesKey => {
    packageJson[dependenciesKey] = {
      'styled-components': styledComponentsVersion,
    }
  })

  let error = null

  try {
    styledComponentsVersionCheck(packageJson)
  } catch (e) {
    error = e
  }

  expect(error).toBeNull()
}

const errorTest = (styledComponentsVersion, dependenciesKeys) => {
  const packageJson = {}

  dependenciesKeys.forEach(dependenciesKey => {
    packageJson[dependenciesKey] = {
      'styled-components': styledComponentsVersion,
    }
  })

  let error = null

  try {
    styledComponentsVersionCheck(packageJson)
  } catch (e) {
    error = e
  }

  expect(error).not.toBeNull()
  expect(error.message).toContain(styledComponentsVersion)
}

describe('styled-components version check', () => {
  describe('has wrong (^4.4.1) SC version in dependencies', () => {
    it('should throw an error', () => {
      errorTest('^4.4.1', ['dependencies'])
    })
  })

  describe('has correct (^5.0.1) SC version in dependencies', () => {
    it('should NOT throw an error', () => {
      successTest('^5.0.1', ['dependencies'])
    })
  })

  describe('has wrong (^4.4.1) SC version in devDependencies and peerDependencies', () => {
    it('should throw an error', () => {
      errorTest('^4.4.1', ['devDependencies', 'peerDependencies'])
    })
  })

  describe('has correct (^5.0.1) SC version in devDependencies and peerDependencies', () => {
    it('should NOT throw an error', () => {
      successTest('^5.0.1', ['devDependencies', 'peerDependencies'])
    })
  })

  describe('has wrong (^4.4.1) SC version in devDependencies', () => {
    it('should throw an error', () => {
      errorTest('^4.4.1', ['devDependencies'])
    })
  })

  describe('has correct (^5.0.1) SC version in devDependencies', () => {
    it('should NOT throw an error', () => {
      successTest('^5.0.1', ['devDependencies'])
    })
  })
})