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POBetter way to dynamically change require statement for code-coverage on tests?
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  1. POBetter way to dynamically change require statement for code-coverage on tests?
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    copied!<p>I have a node.js library which I've setup for BDD with <a href="http://visionmedia.github.io/mocha/" rel="nofollow"><strong>mocha</strong></a> and <a href="http://chaijs.com/" rel="nofollow"><strong>chai</strong></a>. I've also added code coverage with <a href="http://gotwarlost.github.io/istanbul/" rel="nofollow"><strong>istanbul</strong></a>. And everything runs via <a href="http://gruntjs.com/" rel="nofollow">grunt</a> tasks. </p> <p>I struggled for a while and I finally got it working after I based my setup on this repository: <a href="https://github.com/morkai/h5.buffers" rel="nofollow">https://github.com/morkai/h5.buffers</a>. It works but I don't like the implementation.</p> <p>The grunt-istanbul plugin instruments the files, an environment variable is set, and the tests use the environment variable to find the location of instrumented tests. It is this last part that I don't like.</p> <pre><code>//Gruntfile.js // ... env: { "default": { LIB_FOR_TESTS_DIR: srcLibForTestsDir }, coverage: { LIB_FOR_TESTS_DIR: lcovLibForTestsDir } } // ... </code></pre> <p>Then in the test file, the code is: </p> <pre><code>var FooClient = require((process.env.LIB_FOR_TESTS_DIR || '../lib') + '/foo-client.js'); </code></pre> <p>I'm also using a helper in the test for any initialization required before running the test file. So I had two thoughts;</p> <ol> <li><p>Use the test helper for pulling in the files and hide the details there:</p> <pre><code>var foo = require('./test-helper.js').foo; var FooClient = foo.FooClient; var ThatOtherThing = foo.ThatOtherThing; </code></pre></li> <li><p>Use a test runner? I've seen references to this but I have not found much information about it and best practices.</p></li> </ol> <p>Is there a better way?</p> <p>P.S. If somebody has a suggestion for a better title for this question, I'm open for ideas.</p> <p>P.P.S. Please don't tell me to switch to <strong>blanket</strong> in your answer. I evaluated both and decided on istanbul because it gives more code coverage insights (e.g., branching). If the istanbul branch of blanket is ever completed, then I'll consider switching.</p>
 

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