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50 lines
1.1 KiB
50 lines
1.1 KiB
9 years ago
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'use strict';
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const common = require('../common');
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const assert = require('assert');
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const zlib = require('zlib');
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const path = require('path');
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const bigData = new Buffer(10240).fill('x');
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const opts = {
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level: 0,
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highWaterMark: 16
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};
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const deflater = zlib.createDeflate(opts);
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// shim deflater.flush so we can count times executed
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var flushCount = 0;
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var drainCount = 0;
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const flush = deflater.flush;
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deflater.flush = function(kind, callback) {
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flushCount++;
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flush.call(this, kind, callback);
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};
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deflater.write(bigData);
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const ws = deflater._writableState;
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const beforeFlush = ws.needDrain;
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var afterFlush = ws.needDrain;
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deflater.flush(function(err) {
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afterFlush = ws.needDrain;
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});
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deflater.on('drain', function() {
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drainCount++;;
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});
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process.once('exit', function() {
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assert.equal(beforeFlush, true,
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'before calling flush the writable stream should need to drain');
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assert.equal(afterFlush, false,
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'after calling flush the writable stream should not need to drain');
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assert.equal(drainCount, 1,
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'the deflater should have emitted a single drain event');
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assert.equal(flushCount, 2,
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'flush should be called twice');
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});
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