// test unequal var assert = require('assert'), math = require('../../../index'), bignumber = math.bignumber, complex = math.complex, matrix = math.matrix, sparse = math.sparse, unit = math.unit, unequal = math.unequal; describe('unequal', function() { it('should compare two numbers correctly', function() { assert.equal(unequal(2, 3), true); assert.equal(unequal(2, 2), false); assert.equal(unequal(0, 0), false); assert.equal(unequal(-2, 2), true); assert.equal(unequal(true, 1), false); }); it('should compare two floating point numbers correctly', function() { // NaN assert.equal(unequal(Number.NaN, Number.NaN), true); // Infinity assert.equal(unequal(Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY), false); assert.equal(unequal(Number.NEGATIVE_INFINITY, Number.NEGATIVE_INFINITY), false); assert.equal(unequal(Number.POSITIVE_INFINITY, Number.NEGATIVE_INFINITY), true); assert.equal(unequal(Number.NEGATIVE_INFINITY, Number.POSITIVE_INFINITY), true); assert.equal(unequal(Number.POSITIVE_INFINITY, 2.0), true); assert.equal(unequal(2.0, Number.POSITIVE_INFINITY), true); assert.equal(unequal(Number.NEGATIVE_INFINITY, 2.0), true); assert.equal(unequal(2.0, Number.NEGATIVE_INFINITY), true); assert.equal(unequal(Number.NaN, Number.POSITIVE_INFINITY), true); assert.equal(unequal(Number.POSITIVE_INFINITY, Number.NaN), true); assert.equal(unequal(Number.NaN, Number.NEGATIVE_INFINITY), true); assert.equal(unequal(Number.NEGATIVE_INFINITY, Number.NaN), true); // floating point numbers assert.equal(unequal(0.3 - 0.2, 0.1), false); }); it('should compare two booleans', function() { assert.equal(unequal(true, true), false); assert.equal(unequal(true, false), true); assert.equal(unequal(false, true), true); assert.equal(unequal(false, false), false); }); it('should compare mixed numbers and booleans', function() { assert.equal(unequal(2, true), true); assert.equal(unequal(1, true), false); assert.equal(unequal(0, true), true); assert.equal(unequal(true, 2), true); assert.equal(unequal(true, 1), false); assert.equal(unequal(false, 2), true); assert.equal(unequal(false, 0), false); }); it('should compare bignumbers', function() { assert.deepEqual(unequal(bignumber(2), bignumber(3)), true); assert.deepEqual(unequal(bignumber(2), bignumber(2)), false); assert.deepEqual(unequal(bignumber(3), bignumber(2)), true); assert.deepEqual(unequal(bignumber(0), bignumber(0)), false); assert.deepEqual(unequal(bignumber(-2), bignumber(2)), true); }); it('should compare mixed numbers and bignumbers', function() { assert.deepEqual(unequal(bignumber(2), 3), true); assert.deepEqual(unequal(2, bignumber(2)), false); assert.throws(function () {unequal(1/3, bignumber(1).div(3));}, /TypeError: Cannot implicitly convert a number with >15 significant digits to BigNumber/); assert.throws(function () {unequal(bignumber(1).div(3), 1/3);}, /TypeError: Cannot implicitly convert a number with >15 significant digits to BigNumber/); }); it('should compare mixed booleans and bignumbers', function() { assert.deepEqual(unequal(bignumber(0.1), true), true); assert.deepEqual(unequal(bignumber(1), true), false); assert.deepEqual(unequal(bignumber(1), false), true); assert.deepEqual(unequal(bignumber(0), false), false); assert.deepEqual(unequal(false, bignumber(0)), false); assert.deepEqual(unequal(true, bignumber(0)), true); assert.deepEqual(unequal(true, bignumber(1)), false); }); it('should compare two complex numbers correctly', function() { assert.equal(unequal(complex(2,3), complex(2,4)), true); assert.equal(unequal(complex(2,3), complex(2,3)), false); assert.equal(unequal(complex(1,3), complex(2,3)), true); assert.equal(unequal(complex(1,3), complex(2,4)), true); assert.equal(unequal(complex(2,0), 2), false); assert.equal(unequal(complex(2,1), 2), true); assert.equal(unequal(2, complex(2, 0)), false); assert.equal(unequal(2, complex(2, 1)), true); assert.equal(unequal(complex(2,0), 3), true); }); it('should compare mixed complex numbers and bignumbers (downgrades to numbers)', function() { assert.deepEqual(unequal(math.complex(6, 0), bignumber(6)), false); assert.deepEqual(unequal(math.complex(6, -2), bignumber(6)), true); assert.deepEqual(unequal(bignumber(6), math.complex(6, 0)), false); assert.deepEqual(unequal(bignumber(6), math.complex(6, 4)), true); }); it('should compare two fractions', function() { assert.strictEqual(unequal(math.fraction(3), math.fraction(2)).valueOf(), true); assert.strictEqual(unequal(math.fraction(2), math.fraction(3)).valueOf(), true); assert.strictEqual(unequal(math.fraction(3), math.fraction(3)).valueOf(), false); }); it('should compare mixed fractions and numbers', function() { assert.strictEqual(unequal(1, math.fraction(1,3)), true); assert.strictEqual(unequal(math.fraction(2), 2), false); }); it('should compare two quantitites of the same unit correctly', function() { assert.equal(unequal(unit('100cm'), unit('10inch')), true); assert.equal(unequal(unit('100cm'), unit('1m')), false); //assert.equal(unequal(unit('12inch'), unit('1foot')), false); // round-off error :( //assert.equal(unequal(unit('2.54cm'), unit('1inch')), false); // round-off error :( }); it('should compare null', function() { assert.equal(unequal(null, null), false); assert.equal(unequal(null, undefined), true); assert.equal(unequal(0, null), true); assert.equal(unequal('null', null), true); }); it('should compare undefined', function() { assert.equal(unequal(undefined, undefined), false); assert.equal(unequal(undefined, 'undefined'), true); assert.equal(unequal(undefined, null), true); assert.equal(unequal(2, undefined), true); }); it('should apply configuration option epsilon', function() { var mymath = math.create(); assert.equal(mymath.unequal(1, 0.991), true); assert.equal(mymath.unequal(math.bignumber(1), math.bignumber(0.991)), true); mymath.config({epsilon: 1e-2}); assert.equal(mymath.unequal(1, 0.991), false); assert.equal(mymath.unequal(math.bignumber(1), math.bignumber(0.991)), false); }); it('should throw an error when comparing numbers and units', function() { assert.throws(function () {unequal(unit('100cm'), 22);}); assert.throws(function () {unequal(22, unit('100cm'));}); }); it('should throw an error when comparing bignumbers and units', function() { assert.throws(function () {unequal(unit('100cm'), bignumber(22));}); assert.throws(function () {unequal(bignumber(22), unit('100cm'));}); }); it('should throw an error for two measures of different units', function() { assert.throws(function () {unequal(math.unit(5, 'km'), math.unit(100, 'gram'));}); }); it('should compare two strings correctly', function() { assert.equal(unequal('0', 0), false); assert.equal(unequal('Hello', 'hello'), true); assert.equal(unequal('hello', 'hello'), false); }); describe('Array', function () { it('should compare array - scalar', function () { assert.deepEqual(unequal('B', ['A', 'B', 'C']), [true, false, true]); assert.deepEqual(unequal(['A', 'B', 'C'], 'B'), [true, false, true]); }); it('should compare array - array', function () { assert.deepEqual(unequal([[1, 2, 0], [-1, 0, 2]], [[1, -1, 0], [-1, 1, 0]]), [[false, true, false], [false, true, true]]); }); it('should compare array - dense matrix', function () { assert.deepEqual(unequal([[1, 2, 0], [-1, 0, 2]], matrix([[1, -1, 0], [-1, 1, 0]])), matrix([[false, true, false], [false, true, true]])); }); it('should compare array - sparse matrix', function () { assert.deepEqual(unequal([[1, 2, 0], [-1, 0, 2]], sparse([[1, -1, 0], [-1, 1, 0]])), matrix([[false, true, false], [false, true, true]])); }); it('should throw an error if arrays have different sizes', function() { assert.throws(function () {unequal([1,4,5], [3,4]);}); }); }); describe('DenseMatrix', function () { it('should compare dense matrix - scalar', function () { assert.deepEqual(unequal('B', matrix(['A', 'B', 'C'])), matrix([true, false, true])); assert.deepEqual(unequal(matrix(['A', 'B', 'C']), 'B'), matrix([true, false, true])); }); it('should compare dense matrix - array', function () { assert.deepEqual(unequal(matrix([[1, 2, 0], [-1, 0, 2]]), [[1, -1, 0], [-1, 1, 0]]), matrix([[false, true, false], [false, true, true]])); }); it('should compare dense matrix - dense matrix', function () { assert.deepEqual(unequal(matrix([[1, 2, 0], [-1, 0, 2]]), matrix([[1, -1, 0], [-1, 1, 0]])), matrix([[false, true, false], [false, true, true]])); }); it('should compare dense matrix - sparse matrix', function () { assert.deepEqual(unequal(matrix([[1, 2, 0], [-1, 0, 2]]), sparse([[1, -1, 0], [-1, 1, 0]])), matrix([[false, true, false], [false, true, true]])); }); }); describe('SparseMatrix', function () { it('should compare sparse matrix - scalar', function () { assert.deepEqual(unequal('B', sparse([['A', 'B'], ['C', 'D']])), matrix([[true, false], [true, true]])); assert.deepEqual(unequal(sparse([['A', 'B'], ['C', 'D']]), 'B'), matrix([[true, false], [true, true]])); }); it('should compare sparse matrix - array', function () { assert.deepEqual(unequal(sparse([[1, 2, 0], [-1, 0, 2]]), [[1, -1, 0], [-1, 1, 0]]), matrix([[false, true, false], [false, true, true]])); }); it('should compare sparse matrix - dense matrix', function () { assert.deepEqual(unequal(sparse([[1, 2, 0], [-1, 0, 2]]), matrix([[1, -1, 0], [-1, 1, 0]])), matrix([[false, true, false], [false, true, true]])); }); it('should compare sparse matrix - sparse matrix', function () { assert.deepEqual(unequal(sparse([[1, 2, 0], [-1, 0, 2]]), sparse([[1, -1, 0], [-1, 1, 0]])), matrix([[false, true, false], [false, true, true]])); }); }); it('should throw an error if matrices have different sizes', function() { assert.throws(function () {unequal([1,4,5], [3,4]);}); }); it('should throw an error in case of invalid number of arguments', function() { assert.throws(function () {unequal(1);}, /TypeError: Too few arguments/); assert.throws(function () {unequal(1, 2, 3);}, /TypeError: Too many arguments/); }); it('should LaTeX unequal', function () { var expression = math.parse('unequal(1,0)'); assert.equal(expression.toTex(), '\\left(1\\neq0\\right)'); }); });