text: // test floor
  import assert from 'assert'
  
  import approx from '../../../tools/approx'
  import math from '../../../src/entry/bundleAny'
  const bignumber = math.bignumber
  const complex = math.complex
  const fraction = math.fraction
  const matrix = math.matrix
  const unit = math.unit
  const floor = math.floor
  
  describe('floor', function () {
    it('should round booleans correctly', function () {
      assert.strictEqual(floor(true), 1)
      assert.strictEqual(floor(false), 0)
    })
  
    it('should floor numbers correctly', function () {
      approx.equal(floor(0), 0)
      approx.equal(floor(1), 1)
      approx.equal(floor(1.3), 1)
      approx.equal(floor(1.8), 1)
      approx.equal(floor(2), 2)
      approx.equal(floor(-1), -1)
      approx.equal(floor(-1.3), -2)
      approx.equal(floor(-1.8), -2)
      approx.equal(floor(-2), -2)
      approx.equal(floor(-2.1), -3)
      approx.equal(floor(math.pi), 3)
    })
  
    it('should floor big numbers correctly', function () {
      assert.deepStrictEqual(floor(bignumber(0)), bignumber(0))
      assert.deepStrictEqual(floor(bignumber(1)), bignumber(1))
      assert.deepStrictEqual(floor(bignumber(1.3)), bignumber(1))
      assert.deepStrictEqual(floor(bignumber(1.8)), bignumber(1))
      assert.deepStrictEqual(floor(bignumber(2)), bignumber(2))
      assert.deepStrictEqual(floor(bignumber(-1)), bignumber(-1))
      assert.deepStrictEqual(floor(bignumber(-1.3)), bignumber(-2))
      assert.deepStrictEqual(floor(bignumber(-1.8)), bignumber(-2))
      assert.deepStrictEqual(floor(bignumber(-2)), bignumber(-2))
      assert.deepStrictEqual(floor(bignumber(-2.1)), bignumber(-3))
    })
  
    it('should floor complex numbers correctly', function () {
      approx.deepEqual(floor(complex(0, 0)), complex(0, 0))
      approx.deepEqual(floor(complex(1.3, 1.8)), complex(1, 1))
      approx.deepEqual(floor(math.i), complex(0, 1))
      approx.deepEqual(floor(complex(-1.3, -1.8)), complex(-2, -2))
    })
  
    it('should floor fractions correctly', function () {
      const a = fraction('2/3')
      assert(floor(a) instanceof math.Fraction)
      assert.strictEqual(a.toString(), '0.(6)')
  
      assert.strictEqual(floor(fraction(0)).toString(), '0')
      assert.strictEqual(floor(fraction(1)).toString(), '1')
      assert.strictEqual(floor(fraction(1.3)).toString(), '1')
      assert.strictEqual(floor(fraction(1.8)).toString(), '1')
      assert.strictEqual(floor(fraction(2)).toString(), '2')
      assert.strictEqual(floor(fraction(-1)).toString(), '-1')
      assert.strictEqual(floor(fraction(-1.3)).toString(), '-2')
      assert.strictEqual(floor(fraction(-1.8)).toString(), '-2')
      assert.strictEqual(floor(fraction(-2)).toString(), '-2')
      assert.strictEqual(floor(fraction(-2.1)).toString(), '-3')
    })
  
    it('should gracefully handle round-off errors', function () {
      assert.strictEqual(floor(3.0000000000000004), 3)
      assert.strictEqual(floor(7.999999999999999), 8)
      assert.strictEqual(floor(-3.0000000000000004), -3)
      assert.strictEqual(floor(-7.999999999999999), -8)
      assert.strictEqual(floor(30000.000000000004), 30000)
      assert.strictEqual(floor(799999.9999999999), 800000)
      assert.strictEqual(floor(-30000.000000000004), -30000)
    })
  
    it('should gracefully handle round-off errors with bignumbers', function () {
      assert.deepStrictEqual(floor(bignumber(3.0000000000000004)), bignumber(3))
      assert.deepStrictEqual(floor(bignumber(7.999999999999999)), bignumber(8))
      assert.deepStrictEqual(floor(bignumber(-3.0000000000000004)), bignumber(-3))
      assert.deepStrictEqual(floor(bignumber(-7.999999999999999)), bignumber(-8))
      assert.deepStrictEqual(floor(bignumber(30000.000000000004)), bignumber(30000))
      assert.deepStrictEqual(floor(bignumber(799999.9999999999)), bignumber(800000))
      assert.deepStrictEqual(floor(bignumber(-30000.000000000004)), bignumber(-30000))
    })
  
    it('should throw an error with a unit', function () {
      assert.throws(function () { floor(unit('5cm')) }, TypeError, 'Function floor(unit) not supported')
    })
  
    it('should convert a string to a number', function () {
      assert.strictEqual(floor('1.8'), 1)
    })
  
    it('should floor all elements in a matrix', function () {
      approx.deepEqual(floor([1.2, 3.4, 5.6, 7.8, 10.0]), [1, 3, 5, 7, 10])
      approx.deepEqual(floor(matrix([1.2, 3.4, 5.6, 7.8, 10.0])), matrix([1, 3, 5, 7, 10]))
    })
  
    it('should throw an error in case of invalid number of arguments', function () {
      assert.throws(function () { floor() }, /TypeError: Too few arguments/)
      assert.throws(function () { floor(1, 2) }, /TypeError: Too many arguments/)
    })
  
    it('should throw an in case of wrong type of arguments', function () {
      assert.throws(function () { floor(null) }, /TypeError: Unexpected type of argument/)
    })
  
    it('should LaTeX floor', function () {
      const expression = math.parse('floor(0.6)')
      assert.strictEqual(expression.toTex(), '\\left\\lfloor0.6\\right\\rfloor')
    })
  })
  