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75 lines
2.4 KiB
JavaScript
75 lines
2.4 KiB
JavaScript
// test cube
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var assert = require('assert');
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var math = require('../../../index');
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var unit = math.unit;
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var bignumber = math.bignumber;
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var fraction = math.fraction;
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var matrix = math.matrix;
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var range = math.range;
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var cube = math.cube;
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describe('cube', function() {
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it('should return the cube of a boolean', function () {
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assert.equal(cube(true), 1);
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assert.equal(cube(false), 0);
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});
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it('should return the cube of null', function () {
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assert.equal(math.ceil(null), 0);
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});
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it('should return the cube of a number', function() {
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assert.equal(cube(4), 64);
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assert.equal(cube(-2), -8);
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assert.equal(cube(0), 0);
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});
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it('should return the cube of a big number', function() {
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assert.deepEqual(cube(bignumber(4)), bignumber(64));
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assert.deepEqual(cube(bignumber(-2)), bignumber(-8));
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assert.deepEqual(cube(bignumber(0)), bignumber(0));
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});
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it('should return the cube of a fraction', function() {
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var a = fraction(0.5);
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assert(cube(a) instanceof math.type.Fraction);
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assert.equal(cube(a).toString(), '0.125');
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assert.equal(a.toString(), '0.5');
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});
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it('should return the cube of a complex number', function() {
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assert.deepEqual(cube(math.complex('2i')), math.complex('-8i'));
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assert.deepEqual(cube(math.complex('2+3i')), math.complex('-46+9i'));
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assert.deepEqual(cube(math.complex('2')), math.complex('8'));
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});
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it('should return the cube of a unit', function() {
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assert.equal(cube(math.unit('4 cm')).toString(), '64 cm^3');
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assert.equal(cube(math.unit('-2 cm')).toString(), '-8 cm^3');
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assert.equal(cube(math.unit('0 cm')).toString(), '0 cm^3');
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});
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it('should throw an error with strings', function() {
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assert.throws(function () {cube('text')});
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});
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it('should throw an error if there\'s wrong number of args', function() {
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assert.throws(function () {cube()}, /TypeError: Too few arguments/);
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assert.throws(function () {cube(1, 2)}, /TypeError: Too many arguments/);
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});
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it('should cube each element in a matrix, array or range', function() {
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// array, matrix, range
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// arrays are evaluated element wise
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assert.deepEqual(cube([2,3,4,5]), [8,27,64,125]);
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assert.deepEqual(cube(matrix([2,3,4,5])), matrix([8,27,64,125]));
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assert.deepEqual(cube(matrix([[1,2],[3,4]])), matrix([[1,8],[27,64]]));
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});
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it('should LaTeX cube', function () {
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var expression = math.parse('cube(2)');
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assert.equal(expression.toTex(), '\\left(2\\right)^3');
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});
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});
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