sazerac.js

test(isPrime, () => {
  given(1).expect(false)
  given(2).expect(true)
  given(3).expect(true)
  given(4).expect(false)
})

// vs.

describe('isPrime()', () => {
  it('handles integers correctly', () => {
    expect(isPrime(1)).toBe(false)
    expect(isPrime(2)).toBe(true)
    expect(isPrime(3)).toBe(true)
    expect(isPrime(4)).toBe(false)
  })
})

////////////////

test(ProductComponent, () => {
  forCases(
    given({}),
    given({ price: '1.11', inventory: '111' }),
    given({ title: 'p1', inventory: '111' }),
    given({ title: 'p1', price: '1.11' })
  )
  .assert('should render `error` class', (p) => {
    expect(p.product.hasClass('error')).toBe(true)
  })
  .assert('should display error message', (p) => {
    expect(p.errorMessage.text()).toMatch(/Please enter all product info/)
  })
  .assert('should not display success message', (p) => {
    expect(p.successMessage.exists()).toBe(false)
  })
})

// vs.

describe('ProductComponent', () => {
  const cases = [
    {},
    { price: '1.11', inventory: '111' },
    { title: 'p1', inventory: '111' },
    { title: 'p1', price: '1.11' }
  ]
  
  cases.forEach((input) => {
    const p = ProductComponent(input)
    it('should render `error` class', (p) => expect(p.product.hasClass('error')).toBe(true))
    it('should display error message', (p) => expect(p.errorMessage.text()).toMatch(/Please enter all product info/))
    it('should not display success message', (p) => expect(p.successMessage.exists()).toBe(false))
  })
})