Are there any JavaScript testing frameworks that offer a similar functionality to Python's doctest?
function multiply(x, y) {
/**
Returns the product of `x` and `y`:
> multiply(4, 3)
12
The function handles string inputs by converting them to numbers:
> multiply('5', 2)
10
*/
return x * y;
}
I find Ian Bicking's package, doctestjs, to be a unique approach to writing external tests that differ from traditional doctests.
While I rely heavily on Python doctests for my work, I was initially skeptical of the usefulness of doctestjs. However, I discovered some authentic doctests implemented in this project, which you can find here: https://github.com/davidchambers/doctest.
Even though doctest may not be the most popular doctest project for JavaScript, I personally prefer it over others.
Update: Over a year after sharing my initial thoughts, I had the opportunity to contribute to David Chambers' project, which I found to be incredibly well-crafted. I also utilized it in a complex application at work that utilized require.js, and we even added support for AMD modules. I believe there is now support for Common JS modules as well. My positive opinion of this project remains unchanged.
Maybe I was in a fog yesterday. My apologies.
Check out doctestjs (doctestjs on github), it's the right link and appears to be actively updated.
Unlike Python doctest, doctestjs works by declaring tests in an HTML file for execution.
However, it should be feasible to define tests directly in your code and then use a build process to automatically create a test HTML file.
For example, with ant, you could use tasks like copy, replaceregexp, and concat to achieve this. For instance, copying the JS file, replacing non-comment elements and non-doctestjs comments, and concatenating the HTML structure with tests and header/footer.
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