Function TestExampleApp

examples/exampleapp/exampleapp_test.go:19–88

(t *testing.T)

)

func TestExampleApp(t *testing.T) {
	// Start a new Docker environment.
	e, err := e2e.New()
	// Make sure resources are cleaned up.
	t.Cleanup(e.Close)
	testutil.Ok(t, err)

	fmt.Println("=== Start example application...")
	app := e2emon.AsInstrumented(e.Runnable("example_app").
		WithPorts(map[string]int{"http": 8080}).
		Init(e2e.StartOptions{
			Image: "quay.io/brancz/prometheus-example-app:v0.3.0",
		}), "http")

	testutil.Ok(t, e2e.StartAndWaitReady(app))

	config := fmt.Sprintf(`
global:
  external_labels:
    prometheus: prometheus-example-app
scrape_configs:
- job_name: 'example-app'
  scrape_interval: 1s
  scrape_timeout: 1s
  static_configs:
  - targets: [%s]
  relabel_configs:
  - source_labels: ['__address__']
    regex: '^.+:80$'
    action: drop
`, app.InternalEndpoint("http"))

	fmt.Println("=== Start Prometheus")
	// Create Prometheus instance and wait for it to be ready.
	p1 := e2edb.NewPrometheus(e, "prometheus-1")
	testutil.Ok(t, p1.SetConfigEncoded([]byte(config)))
	testutil.Ok(t, e2e.StartAndWaitReady(p1))

	fmt.Println("=== Ensure that Prometheus already scraped something")
	// Ensure that Prometheus already scraped something.
	testutil.Ok(t, p1.WaitSumMetrics(e2emon.Greater(50), "prometheus_tsdb_head_samples_appended_total"))

	// Open example in browser.
	exampleAppURL := fmt.Sprintf("http://%s", app.Endpoint("http"))
	fmt.Printf("=== Example application URL: %s\n", exampleAppURL)
	testutil.Ok(t, e2einteractive.OpenInBrowser(exampleAppURL))

	fmt.Println("=== I need at least 5 requests!")
	testutil.Ok(t, app.WaitSumMetricsWithOptions(
		e2emon.GreaterOrEqual(5),
		[]string{"http_requests_total"},
		e2emon.WithWaitBackoff(
			&backoff.Config{
				Min:        1 * time.Second,
				Max:        10 * time.Second,
				MaxRetries: 100,
			}),
		e2emon.WaitMissingMetrics()),