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07c7f198db
Adds the ability to for write streams to have an _final method which acts similarly to the _flush method that transform streams have but is called before the finish event is emitted and if asynchronous delays the stream from finishing. The `final` option may also be passed in order to set it. PR-URL: https://github.com/nodejs/node/pull/12828 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Refael Ackermann <refack@gmail.com>
40 lines
767 B
JavaScript
40 lines
767 B
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const Transform = require('stream').Transform;
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const _transform = common.mustCall(function _transform(d, e, n) {
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n();
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});
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const _final = common.mustCall(function _final(n) {
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n();
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});
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const _flush = common.mustCall(function _flush(n) {
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n();
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});
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const t = new Transform({
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transform: _transform,
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flush: _flush,
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final: _final
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});
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const t2 = new Transform({});
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t.end(Buffer.from('blerg'));
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t.resume();
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assert.throws(() => {
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t2.end(Buffer.from('blerg'));
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}, /^Error: _transform\(\) is not implemented$/);
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process.on('exit', () => {
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assert.strictEqual(t._transform, _transform);
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assert.strictEqual(t._flush, _flush);
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assert.strictEqual(t._final, _final);
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});
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