Error when trying to test a raw endpoint

[Minivera]

When I try either of these way of testing the following endpoint, I get the subsequent errors. This makes testing raw endpoints more difficult as the only workaround is to extract the logic in another function, which is not documented.

The code

//encore:api public path=/index raw
func Index(w http.ResponseWriter, req *http.Request) {
	w.WriteHeader(http.StatusOK)
}

Using the function directly

req, err := http.NewRequest(http.MethodGet, "/index", nil)
if err != nil {
t.Fatal(err)
}

res := httptest.NewRecorder()
Index(res, req)

Throws /tmp/encore-test1833923309/hello/hello_test.go:20:2: undefined: EncoreInternal_CallIndex.

Using the httptest utilities

req, err := http.NewRequest(http.MethodGet, "/index", nil)
if err != nil {
t.Fatal(err)
}

res := httptest.NewRecorder()
handler := http.HandlerFunc(Index)

handler.ServeHTTP(res, req)

Throws hello/hello_test.go:20:30: cannot reference API endpoint hello.Index without calling it (and 1 more errors).

Context: https://encoredev.slack.com/archives/C0356ERKBEH/p1665261460735409