ember-cli-mirage error: Nothing returned by handler, but handler exists

In the app I'm working with, we have a GET route that validates a user's email address. If the email is invalid, the server responds with:

a 200 status code
response headers with Content-Type:application/json; charset=utf-8
and the response data itself is just a string of "This email is invalid"

I'm trying to simulate this in ember-cli-mirage by doing:

this.get('/ember_api/v1/validations/validate_email', function() {
  return [200, { 'Content-Type': 'application/json' }, "This email is invalid"];

  // also tried this:
  // return new Mirage.Response(200, { 'Content-Type': 'application/json' }, JSON.stringify({"message":"This email is invalid"}));

  // and tried this:
  // return "This email is invalid";
});

The test itself is a button click that fires off this request:

GET "/ember_api/v1/validations/validate_email?email=fakey%40fakefakefake.com&skip_uniq=true"

...and the error I'm getting is:

Pretender intercepted GET /ember_api/v1/validations/validate_email?email=tom%40gmail.com&skip_uniq=true but encountered an error: Nothing returned by handler for /ember_api/v1/validations/validate_email?email=tom%40gmail.com&skip_uniq=true. Remember to return [status, headers, body]; in your route handler.`

It's asking me to return [status, headers, body], but I'm doing this in my handler, and it still throws the error.

Is this actually an issue with the response? Do I need to edit my API to actually return a JSON API formatted object, so I can write the test that way?

I feel like I should be able to return a string in my test since that's what the app is doing. Any help is appreciated.

Solution

The this.get you are using is the Mirage version. You can also use this.pretender.get which should work with your current code sample ...