casperjs: how to include other javascript files during unit tests in tests themselves? - dependency-injection

Question

I am doing some unit test in casperjs and I got stuck: how do include dependency file from the test itself? Included javascript file can be just a bunch of functions, and does not declare any interface (module.exports = ... etc).
I know I can include from the command line
$ casperjs test --include=./my-mock.js mytest.js
but how can I include files from the test itself?
Putting following on the top does not work for me... my_mock is undefined
casper.options.clientScripts = ["./my-mock.js"]; //push() does not help either
//mytest.js is below
// ------------------------------------------
casper.test.begin('ajax mock test', function suite(test) {
my_mock.setFetchedData("bla");
my_mock.doRequest();
test.assertEquals( ......);
test.done();
});
// ------------------------------------------
CasperJS version 1.1.0-DEV using phantomjs version 1.9.1

Answer 1

Using phantom.injectJs method is the best option I've found so far. E.g. you're having two files in your directory: "tests.js" and "settings.js". You want to include "settings.js" into "test.js". The first thing you should do with your "test.js" is write the following:
phantom.injectJs('settings.js');
casper.test.begin(...
...

Answer 2

The reason that clientScripts isn't working is that it is loaded on each page load, so you don't have access to the objects/functions defined in the file outside of a casper.evaluate() call.
You can use require() to pull in modules, however you may need to modify your included script to work with this method.
Here is what I changed your mytest.js to:
var my_mock = require('my-mock');
casper.test.begin('ajax mock test', function suite(test) {
my_mock.setFetchedData("bla");
my_mock.doRequest();
//test.assertEquals( ... );
test.done();
});
And this is a quick script (my-mock.js) that I threw together to print out when you use the functions you provided.
module.exports = {
setFetchedData: function(a) {
console.log('setFetchedData: ' + a);
},
doRequest: function() {
console.log('doRequest');
}
};

Answer 3

I found useful this sample demonstrating --includes option:
$ casperjs test tests/ --pre=pre.js --includes=inc.js --post=post.js
to load functions that you often use in your tests.