describe('Task map', () => {
  it('maps task value', async () => {
    const task = T.of(21)
    const result = await doubleTask(task)()
    expect(result).toBe(42)
  })

  it('uppercases task string', async () => {
    const task = T.of('hello')
    const result = await upperCaseTask(task)()
    expect(result).toBe('HELLO')
  })
})