req.Header = make(http.Header)
				req.Header.Add("Accept", string(FmtOpenMetrics_1_0_0))
				rec := httptest.NewRecorder()
				server.handleStats(rec, req)
			}
		})
	}
}

func TestAppProbe(t *testing.T) {
	// Starts the application first.
	listener, err := net.Listen("tcp", ":0")
	if err != nil {
		t.Errorf("failed to allocate unused port %v", err)
	}