jsmd

Synopsis

jsmd ensures that you will never have outdated and non-working code in your README files.

Usage

Usage: jsmd <path>

Options:

  --show      display the compiled JS after execution
  --help      display this help message
  --version   display the version number

How to use it

Just write your README files in GitHub Flavored Markdown as usual. The only thing that you have to add is the actual assertions. So here is a small example that will hopefully illustrate how assertions look:

var fs = require('fs');

fs.unlink('/tmp/this-is-stupid', function(err) {
  typeof err; // => 'object'
});

In this simple example we expect that the type of err is equal to 'object'. As simple as that.

In order to verify if everything works properly just supply the desired file to jsmd and it will verify it for you:

$ jsmd README.md

See the examples for more info.

Which code blocks get evaluated

In order jsmd to recognize your JavaScript code elements, you have to specify them either as "js" or "javascript".

To get JavaScript syntax highlighting, without jsmd running the code, specify the code block as "node".

```node
var rm_rf = require('rimraf')
rm_rf('/usr/bin')
```

Hidden setup

Sometimes you don't want to put helper code into your readme file, but it's necessary in order to perform the tests. In this case, you can simply add special html comments which jsmd will extract and put inside the compiled file.

<!-- js
var server = require('express');
server();
-->

That way, GitHub won't visualize the comment but jsmd will be able to parse it.

How it works

jsmd has very simple flow, that looks like this:

• First jsmd will parse and extract all JavaScript code elements
• It will search the code snippets for "assertions". Assertions look like this Math.min(1, 2) // => 1
• It will compile the JavaScript code with the assertions and it will try to execute it
• It will report failures if any

Installation

$ npm install jsmd -g

Tests

Running the tests

$ npm test

Test coverage

$ npm run-script coverage

Credits

Special thanks to:

• Jake Rosoman

Related projects

• Doctest.js
• xplain - JavaScript API documentation generator that uses unit tests as examples

License

(The MIT License)

Copyright (c) 2013 Veselin Todorov [email protected]

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.