Author: asmyczek

Popcorn – Data Driven Testing with JSON

October 26, 2009

Are you looking for a quick, easy and flexible way to create JSON objects to test your JSON service? Or maybe a tool to mock server responses to test some JavaScript browser code? If so, you might be interested in Popcorn.

Popcorn is a JavaScript embedded DSL design to generate any kind of JSON object. It comes with a basic set of generators for most common JavaScript types, and combinators to build new generators for any kind of data. With Popcorn thousands of test cases can be expressed in just few lines of code, which makes it a great driver for data-driven test engines. Let’s go for a quick tour.

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Categories: JavaScript, Tools
646 Comments
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Fuzzing in JavaScript, an exercise in monadic computation

May 30, 2009

As I mentioned in a previous post, following is an introduction to monadic computation in JavaScript. The intent of this post is to demonstrate many advantages of monadic abstraction by implementing a concrete example from ground up. The theory behind monads I will leave to other online tutorials.
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Categories: Fuzzing, JavaScript
736 Comments
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Monadic parser in JavaScript

May 13, 2009

After exploring Haskell for some time, I find myself often adopting functional concepts in my daily work. The exposure to functional programming has even affected the set of tools and frameworks I use. For example, having to parse a custom data format I first tend to search for a Parsec clone implemented in the currently used language. This time it was for JavaScript, but a quick Google search did not reveal any relevant projects. Therefore following is the initial attempt to a probably first general purpose parser library for JavaScript, ‘p4js’.
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Categories: JavaScript
1,110 Comments
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