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fix: write dep-graph payloads to stdout stream
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| import { Readable } from 'stream'; | ||
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| export class ConcatStream extends Readable { | ||
| private current: Readable | undefined; | ||
| private queue: Readable[] = []; | ||
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| constructor(...streams: Readable[]) { | ||
| super({ objectMode: false }); // Adjust objectMode if needed | ||
| this.queue.push(...streams); | ||
| } | ||
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| append(...streams: Readable[]): void { | ||
| this.queue.push(...streams); | ||
| if (!this.current) { | ||
| this._read(); | ||
| } | ||
| } | ||
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| _read(size?: number): void { | ||
| if (this.current) { | ||
| return; | ||
| } | ||
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| this.current = this.queue.shift(); | ||
| if (!this.current) { | ||
| this.push(null); | ||
| return; | ||
| } | ||
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| this.current.on('data', (chunk) => this.push(chunk)); | ||
| this.current.on('end', () => { | ||
| this.current = undefined; | ||
| this._read(size); | ||
| }); | ||
| this.current.on('error', (err) => this.emit('error', err)); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| import { Readable, Writable } from 'stream'; | ||
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| import { ConcatStream } from '../../../../src/lib/stream'; | ||
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| describe('ConcatStream', () => { | ||
| it('should create a readable stream', () => { | ||
| const stream = new ConcatStream(); | ||
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| expect(stream).toBeInstanceOf(Readable); | ||
| }); | ||
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| it('should concatenate readable streams', async () => { | ||
| const stream = new ConcatStream(); | ||
| const chunks = jest.fn(); | ||
| const out = new Writable({ | ||
| write: (chunk, enc, done) => { | ||
| chunks(chunk.toString()); | ||
| done(); | ||
| }, | ||
| }); | ||
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| stream.append(Readable.from('foo'), Readable.from('bar')); | ||
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| await new Promise((res) => { | ||
| stream.pipe(out).on('finish', res); | ||
| }); | ||
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| expect(chunks).toHaveBeenCalledWith('foo'); | ||
| expect(chunks).toHaveBeenCalledWith('bar'); | ||
| }); | ||
| }); |