Importing other .js files in Buster.js tests

Question

I'm making my first attempt at Javascript testing, with Buster.js

I've followed the instructions at the Buster site to run "states the obvious" test. However, I haven't been able to import any of my existing .js files into the tests.

For instance, I have a file js/testLibrary.js, containing:

function addTwo(inp) {
  return inp+2;
}

and a file test/first-test.js, containing:

// Node.js tests
var buster = require("buster");
var testLibrary = require("../js/testLibrary.js");
var assert = buster.referee.assert;

buster.testCase("A module", {
    "Test The Library": function() {
            result = addTwo(3);
            console.log(result);
            assert(true, 'a message for you');
    }
});

Running buster-test gives:

Error: A module Test The Library
    ReferenceError: addTwo is not defined
    [...]

Replacing result = addTwo(3); with result = testLibrary.addTwo(3); gives:

Error: A module Test The Library
    TypeError: Object #<Object> has no method 'addTwo'
    [...]

I'm probably missing something really basic, but at present, I'm completely stumped. Can someone point me in the right direction?

Answer 1

That is because you are not exporting this function from the module. Take a look at that: http://nodejs.org/api/modules.html#modules_module_exports