72 lines
2.4 KiB
JavaScript
72 lines
2.4 KiB
JavaScript
const { test } = require('node:test');
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const assert = require('node:assert');
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const { packShelf } = require('../src/pack-shelf');
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test('pack-shelf: 3 equal rects fit horizontally', () => {
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const rects = [
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{ alias: 'a', w: 32, h: 32 },
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{ alias: 'b', w: 32, h: 32 },
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{ alias: 'c', w: 32, h: 32 },
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];
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const r = packShelf(rects, 4096);
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assert.strictEqual(r.error, undefined);
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assert.strictEqual(r.placed.length, 3);
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// All in one row at y=0; row height = 32
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assert.strictEqual(r.boundsH, 32);
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assert.strictEqual(r.boundsW, 96);
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assert.strictEqual(r.placed[0].x, 0);
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assert.strictEqual(r.placed[0].y, 0);
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});
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test('pack-shelf: height-sort desc — tall sprite first', () => {
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const rects = [
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{ alias: 'short', w: 32, h: 16 },
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{ alias: 'tall', w: 32, h: 64 },
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{ alias: 'mid', w: 32, h: 32 },
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];
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const r = packShelf(rects, 4096);
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// Row 0 contains tall (64) + mid (32) + short (16) — all fit in row height 64
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assert.strictEqual(r.boundsH, 64);
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// Tall placed at x=0
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const tall = r.placed.find(p => p.alias === 'tall');
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assert.strictEqual(tall.x, 0);
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assert.strictEqual(tall.y, 0);
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});
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test('pack-shelf: row wrap when max-width exceeded', () => {
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const rects = [
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{ alias: 'a', w: 60, h: 20 },
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{ alias: 'b', w: 60, h: 20 },
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];
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const r = packShelf(rects, 100);
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// a fits at (0,0). b needs to wrap to next row.
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const a = r.placed.find(p => p.alias === 'a');
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const b = r.placed.find(p => p.alias === 'b');
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assert.strictEqual(a.y, 0);
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assert.strictEqual(b.y, 20); // shelf height after row 0 = 20
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});
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test('pack-shelf: oversize beyond max-size -> error', () => {
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const rects = [{ alias: 'huge', w: 200, h: 200 }];
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const r = packShelf(rects, 100);
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assert.strictEqual(r.error, 'oversize');
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assert.match(r.message, /max-size/);
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});
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test('pack-shelf: deterministic across runs', () => {
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const rects = [
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{ alias: 'a', w: 32, h: 32 },
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{ alias: 'b', w: 64, h: 48 },
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{ alias: 'c', w: 16, h: 16 },
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];
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const r1 = packShelf(rects, 4096);
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const r2 = packShelf(rects, 4096);
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assert.deepStrictEqual(r1.placed, r2.placed);
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});
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test('pack-shelf: preserves rect aux fields', () => {
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const rects = [{ alias: 'a', w: 32, h: 32, sourceFile: 'A.png' }];
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const r = packShelf(rects, 4096);
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assert.strictEqual(r.placed[0].sourceFile, 'A.png');
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});
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