Testing the Happy Path

Defining the happy path test

The test is structured very similarly to the error test from the previous lesson. The common elements are these:

• It accepts a context with a Plug.Conn that contains a valid JWT.

• It calls the endpoint using put/3, a helper from the Phoenix library.

• It uses json_response/2 to assert on the HTTP response code and to deserialize the JSON response.

• It makes assertions on the return value.

• It makes assertions on the side effects.

Let’s add the following test inside the describe block PUT /api/users/:id.