mirror of
https://github.com/josdejong/mathjs.git
synced 2025-12-08 19:46:04 +00:00
85 lines
2.9 KiB
JavaScript
85 lines
2.9 KiB
JavaScript
var assert = require('assert');
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var math = require('../../../index');
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var isZero = math.isZero;
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var bignumber = math.bignumber;
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var fraction = math.fraction;
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var complex = math.complex;
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var unit = math.unit;
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describe('isZero', function() {
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it('should test whether a number is zero', function() {
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assert.strictEqual(isZero(0), true);
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assert.strictEqual(isZero(-0), true);
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assert.strictEqual(isZero(2), false);
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assert.strictEqual(isZero(-3), false);
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assert.strictEqual(isZero(-0.5), false);
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assert.strictEqual(isZero(Infinity), false);
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assert.strictEqual(isZero(-Infinity), false);
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assert.strictEqual(isZero(NaN), false);
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});
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it('should test whether a boolean is zero', function() {
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assert.strictEqual(isZero(true), false);
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assert.strictEqual(isZero(false), true);
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});
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it('should test whether a BigNumber is zero', function() {
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assert.strictEqual(isZero(bignumber(0)), true);
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assert.strictEqual(isZero(bignumber(-0)), true);
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assert.strictEqual(isZero(bignumber(2)), false);
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assert.strictEqual(isZero(bignumber(-3)), false);
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assert.strictEqual(isZero(bignumber(-0.5)), false);
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assert.strictEqual(isZero(bignumber(Infinity)), false);
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assert.strictEqual(isZero(bignumber(-Infinity)), false);
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assert.strictEqual(isZero(bignumber(NaN)), false);
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});
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it('should test whether a Fraction is zero', function() {
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assert.strictEqual(isZero(fraction(0)), true);
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assert.strictEqual(isZero(fraction(-0)), true);
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assert.strictEqual(isZero(fraction(2)), false);
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assert.strictEqual(isZero(fraction(-3)), false);
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});
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it('should test whether a string contains a zero value', function() {
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assert.strictEqual(isZero('0'), true);
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assert.strictEqual(isZero('-0'), true);
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assert.strictEqual(isZero('2'), false);
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assert.strictEqual(isZero('-3'), false);
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});
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it('should test whether a complex number is zero', function() {
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assert.strictEqual(isZero(complex(0, 0)), true);
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assert.strictEqual(isZero(complex(0, 1)), false);
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assert.strictEqual(isZero(complex(2, 0)), false);
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assert.strictEqual(isZero(complex(2, 4)), false);
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});
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it('should test whether a unit is zero', function() {
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assert.strictEqual(isZero(unit('0 m')), true);
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assert.strictEqual(isZero(unit('0 kB')), true);
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assert.strictEqual(isZero(unit('5 cm')), false);
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assert.strictEqual(isZero(unit('-3 inch')), false);
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});
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it('should test isZero element wise on an Array', function() {
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assert.deepEqual(isZero([0, 5, 0, -3]), [true, false, true, false]);
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});
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it('should test isZero element wise on a Matrix', function() {
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assert.deepEqual(isZero(math.matrix([0, 5, 0, -3])), math.matrix([true, false, true, false]));
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});
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it('should throw an error in case of unsupported data types', function() {
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assert.throws(function () {isZero(new Date())}, /TypeError: Unexpected type of argument/);
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assert.throws(function () {isZero({})}, /TypeError: Unexpected type of argument/);
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});
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});
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