mirror of https://github.com/nodejs/node.git
29 lines
692 B
JavaScript
29 lines
692 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');
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const t = new Transform({
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objectMode: true, highWaterMark: 0,
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transform(chunk, enc, callback) {
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process.nextTick(() => callback(null, chunk, enc));
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}
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});
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assert.strictEqual(t.write(1), false);
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t.on('drain', common.mustCall(() => {
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assert.strictEqual(t.write(2), false);
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t.end();
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}));
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t.once('readable', common.mustCall(() => {
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assert.strictEqual(t.read(), 1);
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setImmediate(common.mustCall(() => {
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assert.strictEqual(t.read(), null);
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t.once('readable', common.mustCall(() => {
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assert.strictEqual(t.read(), 2);
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}));
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}));
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}));
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