// test setDifference
import assert from 'assert'

import math from '../../../../src/defaultInstance.js'

describe('setDifference', function () {
  it('should return the difference of two sets', function () {
    assert.deepStrictEqual(math.setDifference([1, 2, 3], [3, 4]), [1, 2])
    assert.deepStrictEqual(math.setDifference([3, 4], [1, 2, 3]), [4])
    assert.deepStrictEqual(math.setDifference([1, 2], [1, 2, 3, 4]), [])
    assert.deepStrictEqual(math.setDifference([], [3, 4]), [])
    assert.deepStrictEqual(math.setDifference([], []), [])
  })

  it('should return the difference of two sets with mixed content', function () {
    assert.deepStrictEqual(math.setDifference([math.complex(5, 1), 4], [1, 2, math.complex(5, 1)]), [4])
  })

  it('should return the difference of two multisets', function () {
    assert.deepStrictEqual(math.setDifference([1, 1, 2, 3, 4, 4], [1, 2, 3, 4, 4, 4]), [1])
    assert.deepStrictEqual(math.setDifference([1, 2, 1, 3, 4, 4], [1, 2, 4, 3, 4, 4]), [1])
  })

  it('should return the same type of output as the inputs', function () {
    assert.strictEqual(math.typeOf(math.setDifference([1, 2, 3], [3, 4, 5])), 'Array')
    assert.strictEqual(math.typeOf(math.setDifference(math.matrix([1, 2, 3]), math.matrix([3, 4, 5]))), 'Matrix')
  })

  it('should throw an error in case of invalid number of arguments', function () {
    assert.throws(function () { math.setDifference() }, /TypeError: Too few arguments/)
    assert.throws(function () { math.setDifference([], [], []) }, /TypeError: Too many arguments/)
  })
})