multi_test

write templated tests based on input and output data

example

const mt = require('multi_test').tape;

mt({
    path: '(a|b)*',
    test_func: (test_name, contents, tape) => {
        tape.equal('done', contents['contents']);}});

usage

Multi_test allows you to write better unit tests. For each test, store inputs and expected outputs in separate files. Then use globbing and filtering to load and process them with minimal effort.

Suppose you are testing the following function:

function prefix(i) {
    return 'pre-' + i;
}

Here are the files necessary for three tests:

01_none_before: ''
01_none_after: 'pre-'
02_short_before: 'a'
02_short_after: 'pre-a'
03_long_before: 'multiple\nlines'
03_long_after: 'pre-multiple\nlines'

Here is the code needed to perform those three tests:

mt({
    path: 'data/*before',
    make_groups: path => {
        const root = path.replace('before', '');
        return {
            before: path,
            after: root + 'after'}),
    test_func: (test_name, contents, tape) => {
        tape.equal(
            prefix(contents['before']['contents']),
            contents['after']['contents']);}});