@luispablo/test-helpers

test-helpers

Some small and simple helpers for my unit tests

Content

DispatchMock

How to use

import { DispatchMock } from "@luispablo/test-helpers";

...

const expectedActions = ["set item", "remove item"]; // The redux actions you want dispatched
const dispatch = DispatchMock(assert, expectedActions, true);
// the first param is the tape assert Object
// the last param is optional, if set to true makes an assert.comment with the actions dispatched

FetcherMock

This component is a function that works as the new fetch API function, so when your code calls it as fetcher("url") it will return a promise that resolves or reject, based on the params you provide. So, first do

import { FetcherMock } from "@luispablo/test-helpers";

And then, for an HTTP 200 response with a JSON body do

const fetcher = FetcherMock({ json: { name: "Tom" } });

So, fetch("anyURL") will resolve a response with a json() function that returns { name: "Tom" }.

To resolve the promise, but with different HTTP code do

const fetcher = FetcherMock({ status: 404 });

This will still resolve when you invoke it, but giving you a response object with the status property in 404.

And finally, if you want it to reject (as in a network error) do

const fetcher = FetcherMock({ error: { code: 1, message: "Network error" } });

This will fall into the catch part of the promise, with an error param with code 1 and the message shown above.

LocalStorageMock

This is a HTML 5 window local storage mock, to use in your tests. Just do:

import { LocalStorageMock } from "@luispablo/test-helpers";

...

// and then
const storage = LocalStorageMock();
// and you're done!