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Use seed in randomised tests #6287

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merged 3 commits into from
Jul 19, 2024
Merged

Use seed in randomised tests #6287

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f34ee15
Seed random
Latropos Jul 17, 2024
c9ed8e1
Move file
Latropos Jul 18, 2024
b79ec57
Remove import
Latropos Jul 18, 2024
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45 changes: 31 additions & 14 deletions packages/react-native-reanimated/__tests__/bezier.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,23 @@ import { Bezier } from '../src/Bezier';
*/
// spell-checker:enable

function splitMix32(seed: number) {
return function () {
seed |= 0;
seed = (seed + 0x9e3779b9) | 0;
let t = seed ^ (seed >>> 16);
t = Math.imul(t, 0x21f0aaad);
t = t ^ (t >>> 15);
t = Math.imul(t, 0x735a2d97);
return ((t = t ^ (t >>> 15)) >>> 0) / 4294967296;
};
}

function getSeededRandom(seed: number) {
return splitMix32(seed);
}

const seededRandom = getSeededRandom(2);
function repeat(n: number) {
return (f: () => void) => {
for (let i = 0; i < n; ++i) {
Expand Down Expand Up @@ -89,8 +106,8 @@ describe('Test `Bezier` function', () => {
const MONKEY_TRIES = 1000;
let allTestPass = true;
repeat(MONKEY_TRIES)(() => {
const a = Math.random();
const b = Math.random();
const a = seededRandom();
const b = seededRandom();

const easing = Bezier(a, a, b, b);

Expand Down Expand Up @@ -123,10 +140,10 @@ describe('Test `Bezier` function', () => {
const MONKEY_TRIES = 1000;
let allTestPass = true;
repeat(MONKEY_TRIES)(() => {
const a = Math.random();
const b = 3 * Math.random() - 1;
const c = Math.random();
const d = 3 * Math.random() - 1;
const a = seededRandom();
const b = 3 * seededRandom() - 1;
const c = seededRandom();
const d = 3 * seededRandom() - 1;
const easing = Bezier(a, b, c, d);

const satisfiesCondition = easing(0) === 0 && easing(1) === 1;
Expand Down Expand Up @@ -191,10 +208,10 @@ describe('Test `Bezier` function', () => {
const PRECISION_0 = 0.02;
let allTestPass0 = true;
repeat(MONKEY_TRIES)(() => {
const a = Math.random();
const b = Math.random();
const c = Math.random();
const d = Math.random();
const a = seededRandom();
const b = seededRandom();
const c = seededRandom();
const d = seededRandom();

const easing1 = Bezier(a, b, c, d);
const easing2 = Bezier(b, a, d, c);
Expand All @@ -214,10 +231,10 @@ describe('Test `Bezier` function', () => {
const PRECISION_1 = 1e-12;
let allTestPass1 = true;
repeat(MONKEY_TRIES)(() => {
const a = 0.9 * Math.random() + 0.05;
const b = 0.9 * Math.random() + 0.05;
const c = 0.9 * Math.random() + 0.05;
const d = 0.9 * Math.random() + 0.05;
const a = 0.9 * seededRandom() + 0.05;
const b = 0.9 * seededRandom() + 0.05;
const c = 0.9 * seededRandom() + 0.05;
const d = 0.9 * seededRandom() + 0.05;

const easing1 = Bezier(a, b, c, d);
const easing2 = Bezier(b, a, d, c);
Expand Down