describe('TaskEither fold operations', () => {
  it('matches success case', async () => {
    const task = TE.right(42)
    const result = await getMessage(task)
    expect(result).toBe('Success: 42')
  })

  it('matches error case', async () => {
    const task = TE.left('failed')
    const result = await getMessage(task)
    expect(result).toBe('Error: failed')
  })

  it('gets success value', async () => {
    const task = TE.right(100)
    const result = await getWithDefault(task)
    expect(result).toBe(100)
  })

  it('gets default on error', async () => {
    const task = TE.left('error')
    const result = await getWithDefault(task)
    expect(result).toBe(0)
  })
})