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tiennm99
51a4b90163
Convert all 41 TypeScript source/config files in cc4e-course/quiz-project (Next.js), gstack (Astro), and superpowers (Vite/React/Phaser) to plain JavaScript with JSDoc type annotations, replacing tsconfig.json with jsconfig.json (strict + checkJs) in each subproject. No behavior changes: lint, typecheck, test, and build gates match their TypeScript baselines exactly in all three subprojects. Update stack references in the affected READMEs accordingly.
67 lines
2.3 KiB
JavaScript
67 lines
2.3 KiB
JavaScript
import { describe, expect, it } from 'vitest';
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import { congruentSSS, sides, triangle } from './triangle';
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import { EPSILON_LEN, vec } from './vec';
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describe('sides', () => {
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it('returns the three side lengths in the AB / BC / CA order', () => {
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const t = triangle(vec(0, 0), vec(3, 0), vec(0, 4));
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const s = sides(t);
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expect(s.ab).toBe(3);
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expect(s.bc).toBe(5);
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expect(s.ca).toBe(4);
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});
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it('handles degenerate (collinear) triangles without crashing', () => {
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const t = triangle(vec(0, 0), vec(1, 0), vec(2, 0));
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const s = sides(t);
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expect(s.ab).toBe(1);
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expect(s.bc).toBe(1);
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expect(s.ca).toBe(2);
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});
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});
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describe('congruentSSS', () => {
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const t1 = triangle(vec(0, 0), vec(3, 0), vec(0, 4));
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it('detects identical triangles', () => {
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expect(congruentSSS(t1, t1)).toBe(true);
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});
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it('detects translated congruent triangles (translation preserves congruence)', () => {
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const t2 = triangle(vec(10, 10), vec(13, 10), vec(10, 14));
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expect(congruentSSS(t1, t2)).toBe(true);
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});
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it('rejects similar-but-not-congruent triangles (2x scale)', () => {
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const t2 = triangle(vec(0, 0), vec(6, 0), vec(0, 8));
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expect(congruentSSS(t1, t2)).toBe(false);
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});
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it('rejects triangles with different shape', () => {
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const t2 = triangle(vec(0, 0), vec(3, 0), vec(2, 5));
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expect(congruentSSS(t1, t2)).toBe(false);
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});
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it('treats matches within EPSILON_LEN as congruent', () => {
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const t2 = triangle(vec(0, 0), vec(3 + EPSILON_LEN / 2, 0), vec(0, 4));
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expect(congruentSSS(t1, t2)).toBe(true);
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});
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it('rejects matches just outside EPSILON_LEN', () => {
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const t2 = triangle(vec(0, 0), vec(3 + EPSILON_LEN * 2, 0), vec(0, 4));
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expect(congruentSSS(t1, t2)).toBe(false);
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});
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it('is position-strict: permuted side-length sets do NOT count as congruent', () => {
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// Same side-length set {3, 4, 5} but in a different label order.
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// Strict SSS: AB(t1)=3, AB(t2)=4 → not congruent under our convention.
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const t2 = triangle(vec(0, 0), vec(0, 4), vec(3, 4));
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expect(congruentSSS(t1, t2)).toBe(false);
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});
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it('is symmetric: congruentSSS(t1, t2) === congruentSSS(t2, t1)', () => {
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const t2 = triangle(vec(7, 7), vec(10, 7), vec(7, 11));
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expect(congruentSSS(t1, t2)).toBe(congruentSSS(t2, t1));
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});
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});
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