mathjs/test/function/bitwise/bitAnd.test.js

// test bitAnd
var assert = require('assert'),
    math = require('../../../index'),
    bignumber = math.bignumber,
    bitAnd = math.bitAnd;

describe('bitAnd', function () {

  it('should bitwise and two numbers', function () {
    assert.equal(bitAnd(53, 131), 1);
    assert.equal(bitAnd(2, 3), 2);
    assert.equal(bitAnd(-2, 3), 2);
    assert.equal(bitAnd(2, -3), 0);
    assert.equal(bitAnd(-5, -3), -7);
  });

  it('should bitwise and booleans', function () {
    assert.equal(bitAnd(true, true), 1);
    assert.equal(bitAnd(true, false), 0);
    assert.equal(bitAnd(false, true), 0);
    assert.equal(bitAnd(false, false), 0);
  });

  it('should bitwise and numbers and null', function () {
    assert.equal(math.bitAnd(null, null), 0);
    assert.equal(math.bitAnd(null, 1), 0);
    assert.equal(math.bitAnd(1, null), 0);
  });

  it('should bitwise and mixed numbers and booleans', function () {
    assert.equal(bitAnd(1, true), 1);
    assert.equal(bitAnd(1, false), 0);
    assert.equal(bitAnd(true, 1), 1);
    assert.equal(bitAnd(false, 1), 0);
  });

  it('should bitwise and bignumbers', function () {
    assert.deepEqual(bitAnd(bignumber(1), bignumber(2)), bignumber(0));
    assert.deepEqual(bitAnd(bignumber('-1.0e+31'), bignumber('-1.0e+32')), bignumber('-101273397985285317082036849082368'));
    assert.deepEqual(bitAnd(bignumber('1.0e+31'), bignumber('1.0e+32')), bignumber('8726602014714682917961003433984'));
    assert.deepEqual(bitAnd(bignumber('-1.0e+31'), bignumber('1.0e+32')), bignumber('91273397985285317082038996566016'));
    assert.deepEqual(bitAnd(bignumber('1.0e+31'), bignumber('-1.0e+32')), bignumber('1273397985285317082036849082368'));
    assert.deepEqual(bitAnd(bignumber('2.1877409333271352879E+75'), bignumber('-3.220131224058161211554E+42')), bignumber('2187740933327135287899999999999996863578490213829130431270426161710498840576'));
  });

  it('should bitwise and mixed numbers and bignumbers', function () {
    assert.deepEqual(bitAnd(bignumber(1), 2), bignumber(0));
    assert.deepEqual(bitAnd(1, bignumber(2)), bignumber(0));
    assert.deepEqual(bitAnd(bignumber(7), 9), bignumber(1));
    assert.deepEqual(bitAnd(7, bignumber(9)), bignumber(1));
  });

  it('should bitwise and mixed booleans and bignumbers', function () {
    assert.deepEqual(bitAnd(bignumber(1), true), bignumber(1));
    assert.deepEqual(bitAnd(bignumber(1), false), bignumber(0));
    assert.deepEqual(bitAnd(false, bignumber(3)), bignumber(0));
    assert.deepEqual(bitAnd(true, bignumber(3)), bignumber(1));
  });

  it('should throw an error if used with a unit', function() {
    assert.throws(function () {bitAnd(math.unit('5cm'), 2)}, /TypeError: Unexpected type of argument/);
    assert.throws(function () {bitAnd(2, math.unit('5cm'))}, /TypeError: Unexpected type of argument/);
    assert.throws(function () {bitAnd(math.unit('2cm'), math.unit('5cm'))}, /TypeError: Unexpected type of argument/);
  });

  it('should throw an error if the parameters are not integers', function () {
    assert.throws(function () {
      bitAnd(1.1, 1);
    }, /Integers expected in function bitAnd/);
    assert.throws(function () {
      bitAnd(1, 1.1);
    }, /Integers expected in function bitAnd/);
    assert.throws(function () {
      bitAnd(1.1, 1.1);
    }, /Integers expected in function bitAnd/);
    assert.throws(function () {
      bitAnd(bignumber(1.1), 1);
    }, /Integers expected in function bitAnd/);
    assert.throws(function () {
      bitAnd(1, bignumber(1.1));
    }, /Integers expected in function bitAnd/);
    assert.throws(function () {
      bitAnd(bignumber(1.1), bignumber(1));
    }, /Integers expected in function bitAnd/);
    assert.throws(function () {
      bitAnd(bignumber(1), bignumber(1.1));
    }, /Integers expected in function bitAnd/);
  });

  it('should bitwise and matrices correctly', function () {
    var a2 = math.matrix([[1,2],[3,4]]);
    var a3 = math.matrix([[5,6],[7,8]]);
    var a4 = bitAnd(a2, a3);
    assert.ok(a4 instanceof math.type.Matrix);
    assert.deepEqual(a4.size(), [2,2]);
    assert.deepEqual(a4.valueOf(), [[1,2],[3,0]]);
    var a5 = math.pow(a2, 2);
    assert.ok(a5 instanceof math.type.Matrix);
    assert.deepEqual(a5.size(), [2,2]);
    assert.deepEqual(a5.valueOf(), [[7,10],[15,22]]);
  });

  it('should bitwise and a scalar and a matrix correctly', function () {
    assert.deepEqual(bitAnd(12, math.matrix([3,9])), math.matrix([0,8]));
    assert.deepEqual(bitAnd(math.matrix([3,9]), 12), math.matrix([0,8]));
  });

  it('should bitwise and a scalar and an array correctly', function () {
    assert.deepEqual(bitAnd(12, [3,9]), [0,8]);
    assert.deepEqual(bitAnd([3,9], 12), [0,8]);
  });

  it('should bitwise and a matrix and an array correctly', function () {
    var a = [6,4,28];
    var b = math.matrix([13,92,101]);
    var c = bitAnd(a, b);

    assert.ok(c instanceof math.type.Matrix);
    assert.deepEqual(c, math.matrix([4,4,4]));
  });

  it('should throw an error in case of invalid number of arguments', function () {
    assert.throws(function () {bitAnd(1)}, /TypeError: Too few arguments/);
    assert.throws(function () {bitAnd(1, 2, 3)}, /TypeError: Too many arguments/);
  });

  it('should throw an error in case of invalid type of arguments', function () {
    assert.throws(function () {bitAnd(new Date(), true)}, /TypeError: Unexpected type of argument/);
    assert.throws(function () {bitAnd(true, new Date())}, /TypeError: Unexpected type of argument/);
    assert.throws(function () {bitAnd(true, 'foo')}, /TypeError: Unexpected type of argument/);
    assert.throws(function () {bitAnd('foo', true)}, /TypeError: Unexpected type of argument/);
    assert.throws(function () {bitAnd(true, undefined)}, /TypeError: Unexpected type of argument/);
    assert.throws(function () {bitAnd(undefined, true)}, /TypeError: Unexpected type of argument/);
  });

  it('should LaTeX bitAnd', function () {
    var expression = math.parse('bitAnd(4,2)');
    assert.equal(expression.toTex(), '\\left(4\\&2\\right)');
  });

});