wehub-resource-sync
70 lines
2.2 KiB
JavaScript
70 lines
2.2 KiB
JavaScript
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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const tvmjs = require("../../dist");
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test("Test coverage of [0,100] inclusive", () => {
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const covered = Array(100);
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const rng = new tvmjs.LinearCongruentialGenerator();
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for (let i = 0; i < 100000; i++) {
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covered[rng.nextInt() % 100] = true;
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}
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const notCovered = [];
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for (let i = 0; i < 100; i++) {
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if (!covered[i]) {
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notCovered.push(i);
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}
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}
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expect(notCovered).toEqual([]);
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});
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test("Test whether the same seed make two RNGs generate same results", () => {
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const rng1 = new tvmjs.LinearCongruentialGenerator();
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const rng2 = new tvmjs.LinearCongruentialGenerator();
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rng1.setSeed(42);
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rng2.setSeed(42);
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for (let i = 0; i < 100; i++) {
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expect(rng1.randomFloat()).toBeCloseTo(rng2.randomFloat());
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}
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});
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test("Test two RNGs with different seeds generate different results", () => {
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const rng1 = new tvmjs.LinearCongruentialGenerator();
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const rng2 = new tvmjs.LinearCongruentialGenerator();
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rng1.setSeed(41);
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rng2.setSeed(42);
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let numSame = 0;
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const numTest = 100;
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// Generate `numTest` random numbers, make sure not all are the same.
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for (let i = 0; i < numTest; i++) {
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if (rng1.nextInt() === rng2.nextInt()) {
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numSame += 1;
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}
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}
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expect(numSame < numTest).toBe(true);
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});
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test('Illegal argument to `setSeed()`', () => {
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expect(() => {
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const rng1 = new tvmjs.LinearCongruentialGenerator();
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rng1.setSeed(42.5);
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}).toThrow("Seed should be an integer.");
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});
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