// test ceil
const assert = require('assert')
const approx = require('../../../tools/approx')
const math = require('../../../src/main')
const bignumber = math.bignumber
const complex = math.complex
const fraction = math.fraction
const matrix = math.matrix
const unit = math.unit
const ceil = math.ceil

describe('ceil', function () {
  it('should return the ceil of a boolean', function () {
    assert.equal(ceil(true), 1)
    assert.equal(ceil(false), 0)
  })

  it('should return the ceil of a number', function () {
    approx.equal(ceil(0), 0)
    approx.equal(ceil(1), 1)
    approx.equal(ceil(1.3), 2)
    approx.equal(ceil(1.8), 2)
    approx.equal(ceil(2), 2)
    approx.equal(ceil(-1), -1)
    approx.equal(ceil(-1.3), -1)
    approx.equal(ceil(-1.8), -1)
    approx.equal(ceil(-2), -2)
    approx.equal(ceil(-2.1), -2)
    approx.equal(ceil(math.pi), 4)
  })

  it('should return the ceil of a big number', function () {
    assert.deepEqual(ceil(bignumber(0)), bignumber(0))
    assert.deepEqual(ceil(bignumber(1)), bignumber(1))
    assert.deepEqual(ceil(bignumber(1.3)), bignumber(2))
    assert.deepEqual(ceil(bignumber(1.8)), bignumber(2))
    assert.deepEqual(ceil(bignumber(2)), bignumber(2))
    assert.deepEqual(ceil(bignumber(-1)), bignumber(-1))
    assert.deepEqual(ceil(bignumber(-1.3)), bignumber(-1))
    assert.deepEqual(ceil(bignumber(-1.8)), bignumber(-1))
    assert.deepEqual(ceil(bignumber(-2)), bignumber(-2))
    assert.deepEqual(ceil(bignumber(-2.1)), bignumber(-2))
  })

  it('should return the ceil of real and imag part of a complex', function () {
    approx.deepEqual(ceil(complex(0, 0)), complex(0, 0))
    approx.deepEqual(ceil(complex(1.3, 1.8)), complex(2, 2))
    approx.deepEqual(ceil(math.i), complex(0, 1))
    approx.deepEqual(ceil(complex(-1.3, -1.8)), complex(-1, -1))
  })

  it('should return the ceil of a number', function () {
    const a = fraction('2/3')
    assert(ceil(a) instanceof math.type.Fraction)
    assert.equal(a.toString(), '0.(6)')

    assert.equal(ceil(fraction(0)).toString(), '0')
    assert.equal(ceil(fraction(1)), '1')
    assert.equal(ceil(fraction(1.3)).toString(), '2')
    assert.equal(ceil(fraction(1.8)).toString(), '2')
    assert.equal(ceil(fraction(2)).toString(), '2')
    assert.equal(ceil(fraction(-1)).toString(), '-1')
    assert.equal(ceil(fraction(-1.3)).toString(), '-1')
    assert.equal(ceil(fraction(-1.8)).toString(), '-1')
    assert.equal(ceil(fraction(-2)).toString(), '-2')
    assert.equal(ceil(fraction(-2.1)).toString(), '-2')
  })

  it('should throw an error for units', function () {
    assert.throws(function () { ceil(unit('5cm')) }, TypeError, 'Function ceil(unit) not supported')
  })

  it('should convert a string to a number', function () {
    assert.strictEqual(ceil('1.8'), 2)
  })

  it('should ceil each element in a matrix, array or range', function () {
    approx.deepEqual(ceil([1.2, 3.4, 5.6, 7.8, 10.0]), [2, 4, 6, 8, 10])
    approx.deepEqual(ceil(matrix([1.2, 3.4, 5.6, 7.8, 10.0])), matrix([2, 4, 6, 8, 10]))
  })

  it('should throw an error in case of invalid number of arguments', function () {
    assert.throws(function () { ceil() }, /TypeError: Too few arguments/)
    assert.throws(function () { ceil(1, 2) }, /TypeError: Too many arguments/)
  })

  it('should throw an in case of wrong type of arguments', function () {
    assert.throws(function () { ceil(null) }, /TypeError: Unexpected type of argument/)
  })

  it('should LaTeX ceil', function () {
    const expression = math.parse('ceil(0.5)')
    assert.equal(expression.toTex(), '\\left\\lceil0.5\\right\\rceil')
  })
})