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'use strict';
const common = require('../common');
const stream = require('stream');
const assert = require('assert');
const readable = new stream.Readable({
read: () => {}
});
const writables = [];
for (let i = 0; i < 5; i++) {
const target = new stream.Writable({
write: common.mustCall((chunk, encoding, callback) => {
target.output.push(chunk);
callback();
}, 1)
});
target.output = [];
target.on('pipe', common.mustCall(() => {}));
readable.pipe(target);
writables.push(target);
}
const input = Buffer.from([1, 2, 3, 4, 5]);
readable.push(input);
// The pipe() calls will postpone emission of the 'resume' event using nextTick,
// so no data will be available to the writable streams until then.
process.nextTick(common.mustCall(() => {
for (const target of writables) {
assert.deepStrictEqual(target.output, [input]);
target.on('unpipe', common.mustCall(() => {}));
readable.unpipe(target);
}
readable.push('something else'); // This does not get through.
readable.push(null);
readable.resume(); // Make sure the 'end' event gets emitted.
}));
readable.on('end', common.mustCall(() => {
for (const target of writables) {
assert.deepStrictEqual(target.output, [input]);
}
}));