test('filters active users', () => {
  const users = [
    { id: '1', active: true },
    { id: '2', active: false }
  ]

  const result = filterActiveUsers(users)

  // Generic - failure message: "expected true to be false"
  expect(result.length === 1).toBe(true)
  expect(result[0].id === '1').toBe(true)
})

test('user has expected properties', () => {
  const user = getUser('123')

  // Generic - unhelpful failure message
  expect(user !== null).toBe(true)
  expect(typeof user.email === 'string').toBe(true)
})

test('filters active users', () => {
  const users = [
    { id: '1', active: true },
    { id: '2', active: false }
  ]

  const result = filterActiveUsers(users)

  // Specific - failure: "expected [array] to have length 1, got 0"
  expect(result).toHaveLength(1)
  // Specific - failure: "expected {id: '2'} to match {id: '1'}"
  expect(result[0]).toMatchObject({ id: '1' })
})

test('user has expected properties', () => {
  const user = getUser('123')

  // Specific - failure: "expected null not to be null"
  expect(user).not.toBeNull()
  // Specific - failure: "expected 123 to be a string"
  expect(user.email).toEqual(expect.any(String))
})