chore: import upstream snapshot with attribution

2026-07-13 13:36:25 +08:00
commit 26446540fa
3151 changed files with 974126 additions and 0 deletions
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+const tvmjs = require("../../dist");
+
+test("Test coverage of [0,100] inclusive", () => {
+  const covered = Array(100);
+  const rng = new tvmjs.LinearCongruentialGenerator();
+  for (let i = 0; i < 100000; i++) {
+    covered[rng.nextInt() % 100] = true;
+  }
+  const notCovered = [];
+  for (let i = 0; i < 100; i++) {
+    if (!covered[i]) {
+      notCovered.push(i);
+    }
+  }
+  expect(notCovered).toEqual([]);
+});
+
+test("Test whether the same seed make two RNGs generate same results", () => {
+  const rng1 = new tvmjs.LinearCongruentialGenerator();
+  const rng2 = new tvmjs.LinearCongruentialGenerator();
+  rng1.setSeed(42);
+  rng2.setSeed(42);
+
+  for (let i = 0; i < 100; i++) {
+    expect(rng1.randomFloat()).toBeCloseTo(rng2.randomFloat());
+  }
+});
+
+test("Test two RNGs with different seeds generate different results", () => {
+  const rng1 = new tvmjs.LinearCongruentialGenerator();
+  const rng2 = new tvmjs.LinearCongruentialGenerator();
+  rng1.setSeed(41);
+  rng2.setSeed(42);
+  let numSame = 0;
+  const numTest = 100;
+
+  // Generate `numTest` random numbers, make sure not all are the same.
+  for (let i = 0; i < numTest; i++) {
+    if (rng1.nextInt() === rng2.nextInt()) {
+      numSame += 1;
+    }
+  }
+  expect(numSame < numTest).toBe(true);
+});
+
+test('Illegal argument to `setSeed()`', () => {
+  expect(() => {
+    const rng1 = new tvmjs.LinearCongruentialGenerator();
+    rng1.setSeed(42.5);
+  }).toThrow("Seed should be an integer.");
+});