fix(exp): support text/plain content type with mockutil (#771)

Author: jooola

hcloud/exp/mockutil/http.go

@@ -25,6 +25,7 @@ type Request struct {
 	Status  int
 	JSON    any
 	JSONRaw string
+	TextRaw string
 }
 
 // Handler is using a [Server] to mock http requests provided by the user.
@@ -123,6 +124,13 @@ func (m *Server) handler(w http.ResponseWriter, r *http.Request) {
 		if err != nil {
 			m.t.Fatal(err)
 		}
+	case expected.TextRaw != "":
+		w.Header().Set("Content-Type", "text/plain")
+		w.WriteHeader(expected.Status)
+		_, err := w.Write([]byte(expected.TextRaw))
+		if err != nil {
+			m.t.Fatal(err)
+		}
 	default:
 		w.WriteHeader(expected.Status)
 	}

hcloud/exp/mockutil/http_test.go

@@ -39,6 +39,11 @@ func TestHandler(t *testing.T) {
 			},
 			Status: 200,
 		},
+		{
+			Method: "GET", Path: "/",
+			Status:  200,
+			TextRaw: "hello",
+		},
 	})
 
 	// Request 1
@@ -69,7 +74,14 @@ func TestHandler(t *testing.T) {
 	assert.Empty(t, resp.Header.Get("Content-Type"))
 	assert.Empty(t, readBody(t, resp))
 
-	// Extra request 5
+	// Request 5
+	resp, err = http.Get(server.URL)
+	require.NoError(t, err)
+	assert.Equal(t, 200, resp.StatusCode)
+	assert.Equal(t, "text/plain", resp.Header.Get("Content-Type"))
+	assert.Equal(t, "hello", readBody(t, resp))
+
+	// Extra request 6
 	server.Expect([]Request{
 		{Method: "GET", Path: "/", Status: 200},
 	})