53 lines
2.1 KiB
TypeScript
53 lines
2.1 KiB
TypeScript
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import { expect, test } from 'bun:test'
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import { encodePathCommandsBlob, type OutlineCommand } from '@open-pencil/fig/node-change'
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const outline: OutlineCommand[] = [
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{ type: 'M', x: 2, y: 4 },
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{ type: 'L', x: 6, y: -8 },
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{ type: 'C', x1: 2, y1: -4, x2: 6, y2: 8, x: 10, y: 12 },
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{ type: 'Q', x1: 16, y1: 18, x: 22, y: 24 },
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{ type: 'Z' }
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]
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test('preserves little-endian glyph bytes, scaling, Y inversion, and quadratic conversion', () => {
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const bytes = encodePathCommandsBlob(outline, 2)
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expect(Buffer.from(bytes).toString('hex')).toBe(
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'010000803f000000c0020000404000008040040000803f0000004000004040000080c00000a0400000c0c0040000e040000000c100001041000020c100003041000040c100'
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)
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})
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test('preserves missing-coordinate defaults and signed zero', () => {
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const bytes = encodePathCommandsBlob(
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[{ type: 'M' }, { type: 'C' }, { type: 'Q' }, { type: 'Z' }],
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2
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)
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expect(Buffer.from(bytes).toString('hex')).toBe(
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'010000000000000000040000000000000000000000000000000000000000000000000400000000000000800000000000000080000000000000008000'
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)
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})
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test('ignores unsupported commands without reserving bytes or changing the current point', () => {
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expect(encodePathCommandsBlob([])).toEqual(new Uint8Array())
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expect(encodePathCommandsBlob([{ type: 'unsupported' }])).toEqual(new Uint8Array())
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expect(
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encodePathCommandsBlob(
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[...outline.slice(0, 3), { type: 'unknown', x: 999 }, ...outline.slice(3)],
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2
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)
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).toEqual(encodePathCommandsBlob(outline, 2))
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})
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test('packs repeated contours exactly and owns each returned buffer', () => {
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const contour = encodePathCommandsBlob(outline, 2)
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const copies = 1000
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const bytes = encodePathCommandsBlob(Array.from({ length: copies }, () => outline).flat(), 2)
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expect(bytes.length).toBe(copies * contour.length)
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for (let index = 0; index < copies; index++) {
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expect(bytes.subarray(index * contour.length, (index + 1) * contour.length)).toEqual(contour)
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}
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const another = encodePathCommandsBlob(outline, 2)
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another.fill(0)
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expect(bytes.subarray(0, contour.length)).toEqual(contour)
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})
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