ff1efa6087
PR-URL: https://github.com/nodejs/node/pull/10550 Reviewed-By: Rich Trott <rtrott@gmail.com>
42 lines
849 B
JavaScript
42 lines
849 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 Stream = require('stream');
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var Readable = Stream.Readable;
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var r = new Readable();
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var N = 256;
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var reads = 0;
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r._read = function(n) {
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return r.push(++reads === N ? null : Buffer.allocUnsafe(1));
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};
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r.on('end', common.mustCall(function() {}));
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var w = new Stream();
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w.writable = true;
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var buffered = 0;
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w.write = function(c) {
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buffered += c.length;
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process.nextTick(drain);
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return false;
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};
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function drain() {
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assert(buffered <= 3);
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buffered = 0;
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w.emit('drain');
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}
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w.end = common.mustCall(function() {});
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// Just for kicks, let's mess with the drain count.
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// This verifies that even if it gets negative in the
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// pipe() cleanup function, we'll still function properly.
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r.on('readable', function() {
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w.emit('drain');
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});
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r.pipe(w);
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