describe('TaskEither sequencing', () => {
  it('fetches all successfully', async () => {
    const result = await fetchAll([1, 2, 3])()
    expect(result._tag).toBe('Right')
    if (result._tag === 'Right') {
      expect(result.right).toEqual([10, 20, 30])
    }
  })

  it('fails on first error', async () => {
    const result = await fetchAll([1, 0, 3])()
    expect(result._tag).toBe('Left')
  })

  it('processes in order', async () => {
    const result = await processInOrder([5, 10, 15])()
    expect(result._tag).toBe('Right')
    if (result._tag === 'Right') {
      expect(result.right).toEqual([10, 20, 30])
    }
  })
})