Dicebag.test.js Phase 3

Dicebag.test.js

import {DiceBag, DiceBagWithSeed} from './Dice'
import seedrandom from 'seedrandom'

it('rolls a basic die and returns results', () => {
    const diceBag = DiceBag();
    for (let i = 0; i<100; i++) {
        const result = diceBag.d6().total;
        expect(result).toBeGreaterThanOrEqual(1);
        expect(result).toBeLessThanOrEqual(6);
    }
});

it ('rolls multiple dice with any number of sides', () => {
    const numOfDice = 2;
    const numOfSides = 10;
    for (let i = 0; i<1000; i++) {
        const result = DiceBag().rollDice(numOfDice, numOfSides).total;
        expect(result).toBeGreaterThanOrEqual(2);
        expect(result).toBeLessThanOrEqual(20);
    }
});

it('rolls multiple dice with any number of sides has array of individual results', () => {
    const numOfDice = 2;
    const numOfSides = 10;
    const outcome = DiceBag().rollDice(numOfDice, numOfSides);
    expect(outcome.individualResults.length).toEqual(2);
});

it('throws exception when more than 1000000 dice are attempted', () => {
    const numOfDice = 1400000;
    const numOfSides = 8;
    const outcome = 
    expect(() => {
        DiceBag().rollDice(numOfDice, numOfSides);
    }).toThrow();
});

it('throws exception when more than 1000000 sides are attempted', () => {
    const numOfDice = 8;
    const numOfSides = 1400000;
    const outcome = 
    expect(() => {
        DiceBag().rollDice(numOfDice, numOfSides);
    }).toThrow();
});

it('specified seed always returns the same result', () => {
    const seed = "someRandomSeed!";
    const diceBag = DiceBagWithSeed(seed);
    const outcome = diceBag.rollDice(2, 6);
    expect(outcome.individualResults).toEqual(expect.arrayContaining([6, 6]));
});

it('generator is reused resulting in same results for 2 subsequent rolls as a single call with 2 dice.', () => {
    const seed = "someRandomSeed!";
    const diceBag = DiceBagWithSeed(seed);
    const outcome = diceBag.rollDice(2, 6);
    expect(outcome.individualResults).toEqual(expect.arrayContaining([6, 6]));

    const diceBag2 = DiceBagWithSeed(seed);
    const db2Outcome1 = diceBag2.rollDice(1, 6);
    const db2Outcome2 = diceBag2.rollDice(1, 6);
    expect(db2Outcome1.total).toEqual(6);
    expect(db2Outcome2.total).toEqual(6);
});

//Sum (This should actually be in the ArrayUtils.js test)
it('should add all numbers together', () => {
    var result = DiceBag().sum([1,2,3,4]);
    expect(result).toEqual(10);
});