Hide_D
fa22562bb1
- Removed RNG interface and related utility classes from logic package. - Added RNG interface and utility classes in common package. - Implemented various RNG classes (ConstantRNG, MidpointRNG, SineRNG, SequenceRNG) in common package. - Updated conversion utilities for BytesLike to ArrayBuffer and Uint8Array in common package. - Adjusted tests to import RNG utilities from the new common package. - Updated vitest configuration to resolve common package imports.
74 lines
2.5 KiB
TypeScript
74 lines
2.5 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import { ConstantRNG, MidpointRNG, SequenceRNG, SineRNG } from '@sammo-ts/common';
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const toArray = (bytes: Uint8Array): number[] => Array.from(bytes);
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describe('TestRNG:Constant', () => {
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it('returns fixed 0', () => {
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const rng = new ConstantRNG(0);
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expect(rng.nextFloat1()).toBe(0);
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expect(rng.nextInt(10)).toBe(0);
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expect(toArray(rng.nextBytes(3))).toEqual([0, 0, 0]);
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expect(toArray(rng.nextBits(3))).toEqual([0]);
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});
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it('returns fixed 1', () => {
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const rng = new ConstantRNG(1);
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expect(rng.nextFloat1()).toBe(1);
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expect(rng.nextInt(10)).toBe(10);
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expect(toArray(rng.nextBytes(2))).toEqual([255, 255]);
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expect(toArray(rng.nextBits(3))).toEqual([7]);
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});
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});
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describe('TestRNG:Midpoint', () => {
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it('returns midpoint for int/float', () => {
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const rng = new MidpointRNG();
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expect(rng.nextFloat1()).toBe(0.5);
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expect(rng.nextInt(9)).toBe(4);
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expect(rng.nextInt(10)).toBe(5);
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});
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it('alternates bits', () => {
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const rng = new MidpointRNG();
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expect(toArray(rng.nextBits(4))).toEqual([10]);
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expect(toArray(rng.nextBits(4))).toEqual([10]);
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});
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});
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describe('TestRNG:Sine', () => {
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it('follows sine wave with period/amplitude', () => {
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const rng = new SineRNG(4, 0.5, 0);
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expect(rng.nextFloat1()).toBeCloseTo(0.5, 8);
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expect(rng.nextFloat1()).toBeCloseTo(1, 8);
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expect(rng.nextFloat1()).toBeCloseTo(0.5, 8);
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expect(rng.nextFloat1()).toBeCloseTo(0, 8);
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});
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it('maps float to int range', () => {
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const rng = new SineRNG(4, 0.5, 0);
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expect(rng.nextInt(9)).toBe(5);
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expect(rng.nextInt(9)).toBe(9);
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});
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});
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describe('TestRNG:Sequence', () => {
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it('cycles fixed sequence', () => {
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const rng = new SequenceRNG([0, 0.25, 0.5, 0.75, 1]);
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expect(rng.nextFloat1()).toBe(0);
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expect(rng.nextFloat1()).toBe(0.25);
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expect(rng.nextFloat1()).toBe(0.5);
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expect(rng.nextFloat1()).toBe(0.75);
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expect(rng.nextFloat1()).toBe(1);
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expect(rng.nextFloat1()).toBe(0);
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});
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it('converts sequence to bytes and ints', () => {
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const rng = new SequenceRNG([0, 0.5, 1]);
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expect(toArray(rng.nextBytes(3))).toEqual([0, 128, 255]);
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expect(rng.nextInt(8)).toBe(0);
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expect(rng.nextInt(8)).toBe(4);
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expect(rng.nextInt(8)).toBe(8);
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});
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});
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