npm-verify-stream/test/assert.js

A duplex stream for receiving a package tarball, verifying arbitrary checks, and emitting that same tarball on success.

'use strict';

var fs = require('fs'),
    path = require('path'),
    async = require('async');

/*
 * Extending the assert module. #dealwithit
 */
var assert = module.exports = require('assert');

/*
 * function isVerifyStream(stream, checks)
 * Asserts that the stream is a VerifyStream for
 * the given checks
 */
assert.isVerifyStream = function (stream, checks) {
  assert(stream.__verifier);

  var v = stream.__verifier;
  assert(v.log);
  assert(v.read);
  assert(v.writable);
  assert(v.parser);
  assert(v.buffer);

  assert.equal(v.stream, stream);
  assert.equal(v.concurrency, 5);
  assert.equal(v.checks, checks);
};

/*
 * function wasVerified(input, output)
 * Asserts that the files for `input` and `output` exist
 * and are equal in bytes.
 */
assert.wasVerified = function wasVerified(input, output, done) {
  return function checkVerified() {
    async.parallel({
      input: async.apply(fs.stat, input),
      output: async.apply(fs.stat, output)
    }, function (err, stats) {
      if (err) { throw err; }

      assert(typeof stats.input, 'object');
      assert(typeof stats.output, 'object');
      assert.equal(stats.input.size, stats.output.size);

      done();
    });
  };
};