50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
'use strict';
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const rational = require('../lib/rational');
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const assert = require('assert');
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describe('rational operations', () => {
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it('should divide two equal rational numbers to return 1', () => {
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let result = rational(4, 5).div(rational(4, 5));
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assert.equal(result.num, 1);
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assert.equal(result.den, 1);
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});
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it('should divide two rational numbers with same numerator', () => {
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let result = rational(4, 5).div(rational(4, 7));
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assert.equal(result.num, 7);
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assert.equal(result.den, 5);
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});
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it('should multiply two inverse rational numbers to return 1', () => {
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let result = rational(4, 5).mul(rational(5, 4));
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let result2 = rational(-1,1).mul(rational(8, 1));
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let result3 = rational(-6, 8).mul(rational(8, 1));
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assert.equal(result.num, 1);
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assert.equal(result.den, 1);
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assert.equal(result2.num, -8);
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assert.equal(result2.den, 1);
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assert.equal(result3.num, -6);
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assert.equal(result3.den, 1);
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});
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it('should multiply two rational numbers with same numerator and denominator', () => {
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let result = rational(4, 5).mul(rational(7, 4));
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assert.equal(result.num, 7);
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assert.equal(result.den, 5);
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});
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it('should add two rational numbers', () => {
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let result = rational(4, 5).add(rational(5, 4));
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assert.equal(result.num, 41);
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assert.equal(result.den, 20);
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});
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it('should subtract two rational numbers', () => {
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let result = rational(4, 5).sub(rational(5, 4));
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assert.equal(result.num, -9);
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assert.equal(result.den, 20);
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});
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});
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