include Javascript file in JS file without HTML or DOM in command line script

Question

I'm trying to write some simple tests on JS code that can be run from the command line to test code that has nothing to do with HTML, documents or user interface. To do this I need to include one file within another to pull the code being tested into the test script. What I've found involved HTML or DOM to do the job; for example, something like document.write( ) or some such. Is there a simple way to do this? I'm imaging something like include( "code2test.js" ); I'd appreciate any help in solving this. Can JQuery help or does it have to be used in a HTML/browser context?

Thanks in advance.j

What are you using to run the tests?

Jacob Mattison
– Jacob Mattison

2013-03-19 02:19:21 +00:00
Commented Mar 19, 2013 at 2:19 — Jacob Mattison
– Jacob Mattison, Commented Mar 19, 2013 at 2:19

ic3b3rg · Accepted Answer · 2013-03-19 02:15:13Z

1

It sounds like you just need two script tags:

<script type="text/javascript" src="code2test.js"></script>
<script type="text/javascript" src="testscript.js"></script>

If that doesn't work, try reversing the order.

answered Mar 19, 2013 at 2:15

ic3b3rg

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4 Comments

kennypu Over a year ago

I think he's asking how to include a javascript on the webpage AFTER its loaded, via command line, not how to include it in the html.

Jacob Mattison Over a year ago

No, he's talking about running javascript from the command line, not in a web page at all.

ic3b3rg Over a year ago

In that case, you need to append the script to the document: document.getElementByTagName("head")[0].appendChild(document.createElement("script")).src = "code2test.js";

kennypu Over a year ago

no, according to JacobM, OP is asking for a way to test javascript without going through a browser.

slebetman · Accepted Answer · 2013-03-19 02:21:53Z

1

Sounds like what you need is Require.js. It's designed to allow inclusion of javascript in the web page using javascript rather than script tags. For example, instead of:

<script scr="foo.js"></script>
<script>
    use_foo_here();
</script>

using Require.js you can write:

require(["foo.js"],function(foo){
    use_foo_here();
})

The cool thing about Require.js is that it can even be used on Node.js. So for command line invocation you can use Node to run your scripts and the require() statements would work just like it does on the web page.

answered Mar 19, 2013 at 2:21

slebetman

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kennypu · Accepted Answer · 2013-03-19 02:19:47Z

0

If you just want access to a javascript engine (eg Webkit) without using a browser, you can use something like nodeJS or PhantomJS

answered Mar 19, 2013 at 2:19

kennypu

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Comments

GarethOwen · Accepted Answer · 2013-03-19 08:42:18Z

We are using Chutzpah as our test runner, and are very satisfied with it. We write the tests using Jasmine. Jasmine does not require a DOM.

At the start of the test file, the references to the JavaScript files under test are added, like this:

/// <reference path="dependantModule.js" />
/// <reference path="code2test.js" />

and then the test code follows:

describe("code2test test suite", function () {

    it("should do something"", function () {
        var result;

        // Assuming code2test.js exposes a global called 'code2test'
        result = code2test.doSomething();
        expect(result).toEqual("the expected result");
    });
});

Chutzpah uses the PhantomJS headless browser. So you can write tests that interact with the DOM if required.

We run the tests through Chutzpah from the command line for continuous integration, but also run them inside Visual Studio 2010 using the Chutzpah Visual Studio Extension. I believe integration of Chutzpah in VS2012 is even easier, but haven't tried it myself.

The tests can also be ran inside a 'real' browser, which is great for debugging. My browser of choice for debugging the test code is Chrome - the developer tools are great.

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