When a matcher fails because a header matches the key but not the value, other matchers aren't considered

[julienw]

Hi, thanks for this easy to use library.

I'm using fetch-mock in Jest (using fetch-mock-jest). I'm using fetch-mock v9.11.0.

The code I'm using looks like this:

      const endpointUrl = 'https://api.profiler.firefox.com/profile/0123456789';
      fetch.config.overwriteRoutes = true;
      fetch
        .catch(404) // Catchall
        .mock(endpointUrl, 405) // method not allowed for all methods but delete
        .delete(endpointUrl, 406) // Not acceptable for other Accept values
        .delete(
          {
            url: endpointUrl,
            headers: {
              'Content-Type': 'application/json',
              Accept: 'application/vnd.firefox-profiler+json;version=1.0',
            },
          },
          401  // Unauthorized when no Bearer or no valid Bearer
        )
        .delete(
          {
            url: endpointUrl,
            headers: {
              'Content-Type': 'application/json',
              Accept: 'application/vnd.firefox-profiler+json;version=1.0',
              Authorization: `Bearer NOT_A_TOKEN`,
            },
          },
          200
        );

Then the call looks like this:

  const response = await fetch(ENDPOINT, {
    method: 'DELETE',
    headers: {
      Accept: 'application/vnd.firefox-profiler+json;version=1.0',
      'Content-Type': 'application/json',
      Authorization: `Bearer VALID_TOKEN`,
    },
  });

I would have expected that the last matcher doesn't match, but then the previous one would match. But here the catch matcher is used instead.

I believe this is because the last matcher overwrites previous ones.

When I use fetch.config.overwriteRoutes = false instead, then the matcher returning 405 is used.

Finally, if I add name values for all matchers, without setting fetch.config.overwriteRoutes, then the matcher returning 405 is also used.

Any idea how to make this use case work declaratively?

In the mean time I'll use a function to select the right response.

Thanks!