A quick tutorial of sequential async testing in vows

seq-async-vows.js

var vows = require('vows'),
    assert = require('assert'),
    fs = require('fs');

var first;

vows.describe('some/file/testing').addBatch({
  "First we want to read a file": {
    topic: function () {
      first = true;
      fs.readFile('path/to/first/file', this.callback);
    },
    "should return the data in path/to/first/file": function (err, data) {
      assert.isTrue(!err);
      assert.isNotNull(data);
    },
    "Then when we want to read a second file": {
      topic: function () {
        fs.readFile('path/to/second/file', this.callback);
      },
      "should return the data in path/to/second/file": function (err, data) {
        assert.isTrue(!err);
        assert.isNotNull(data);
        assert.isTrue(first);
      }
    }
  }
}).export(module);