testr

A test framework with zero dependencies

Packages

This monorepo contains all subpackages related to the Testr framework.

Version	Package	Description
Not released	@testr/runnr	Runs simple unit tests
Not released	@testr/io	Creates concise test cases to be executed by @testr/runnr
Not released	@testr/reportr	Reports test results
Not released	@testr/doublr	Substitutes dependencies with test doubles

Example

Let us assume you are working on the following module:

let addOne = n => n + 1

let multiply = (n, m) => n * m

let findUsers = (repository, query) => {
  let users = repository.find(query)
  return users.map(user => {
    return {
      name: `${user.firstName} ${user.lastName}`
    }
  })
}

module.exports = { addOne, multiply, findUsers }

And since you care about your code, you are contemplating to add some test coverage. You have time constraints, so you need this fast and you hate boilerplate anyways.

With testr you can write concise specs like:

let { unit, io, throws, random, type, like, called } = require("testr")

unit({ addOne, multiply, findUsers }).specs({
  addOne: [
    io(5, 6),
    io(9, type.number),
    io(true, throws),
    io(random.number, type.number),
    io({ in: [6], out: 7 })
  ],
  multiply: io(3, 4, 12),
  findUsers: [
    io(mockRepository, { country: "Hungary" }, like([{ name: type.string }])),
    io(mockRepository, {}, [
      called(mockRepository.find, {}),
      result => console.log(result.length)
    ])
  ]
})