Function TestMetricsInstrumentedRoute

modules/caddyhttp/metrics_test.go:483–524

(t *testing.T)

}

func TestMetricsInstrumentedRoute(t *testing.T) {
	ctx, _ := caddy.NewContext(caddy.Context{Context: context.Background()})
	m := &Metrics{
		init:        sync.Once{},
		httpMetrics: &httpMetrics{},
	}

	handlerErr := errors.New("oh noes")
	response := []byte("hello world!")
	innerHandler := HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
		if actual := testutil.ToFloat64(m.httpMetrics.requestInFlight); actual != 1.0 {
			t.Errorf("Expected requestInFlight to be 1.0, got %v", actual)
		}
		if handlerErr == nil {
			w.Write(response)
		}
		return handlerErr
	})

	ih := newMetricsInstrumentedRoute(ctx, "test_handler", innerHandler, m)

	r := httptest.NewRequest("GET", "/", nil)
	w := httptest.NewRecorder()

	// Test with error
	if actual := ih.ServeHTTP(w, r); actual != handlerErr {
		t.Errorf("Expected error %v, got %v", handlerErr, actual)
	}
	if actual := testutil.ToFloat64(m.httpMetrics.requestInFlight); actual != 0.0 {
		t.Errorf("Expected requestInFlight to be 0.0 after request, got %v", actual)
	}
	if actual := testutil.ToFloat64(m.httpMetrics.requestErrors); actual != 1.0 {
		t.Errorf("Expected requestErrors to be 1.0, got %v", actual)
	}

	// Test without error
	handlerErr = nil
	w = httptest.NewRecorder()
	if err := ih.ServeHTTP(w, r); err != nil {
		t.Errorf("Unexpected error: %v", err)
	}
}

func TestMetricsProvisionOTLPDisabled(t *testing.T) {
	ctx, _ := caddy.NewContext(caddy.Context{Context: context.Background()})