csrc/node-v0.10.24/test/simple/test-crypto-hash-stream-pipe.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// "Software"), to deal in the Software without restriction, including
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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var common = require('../common');
var assert = require('assert');

var crypto = require('crypto');
var stream = require('stream')
var s = new stream.PassThrough();
var h = crypto.createHash('sha1');
var expect = '15987e60950cf22655b9323bc1e281f9c4aff47e';
var gotData = false;

process.on('exit', function() {
  assert(gotData);
  console.log('ok');
});

s.pipe(h).on('data', function(c) {
  assert.equal(c, expect);
  gotData = true;
}).setEncoding('hex');

s.end('aoeu');