Add E2E to validate scheduler after init.

Signed-off-by: Artur Souza <[email protected]>

tests/e2e/standalone/init_test.go

@@ -18,9 +18,11 @@ package standalone_test
 
 import (
 	"context"
+	"net"
 	"os"
 	"path/filepath"
 	"runtime"
+	"strconv"
 	"strings"
 	"testing"
 
@@ -157,6 +159,16 @@ func TestStandaloneInit(t *testing.T) {
 		verifyContainers(t, latestDaprRuntimeVersion)
 		verifyBinaries(t, daprPath, latestDaprRuntimeVersion, latestDaprDashboardVersion)
 		verifyConfigs(t, daprPath)
+
+		placementPort := 50005
+		schedulerPort := 50006
+		if runtime.GOOS == "windows" {
+			placementPort = 6050
+			schedulerPort = 6060
+		}
+
+		verifyTCPLocalhost(t, placementPort)
+		verifyTCPLocalhost(t, schedulerPort)
 	})
 
 	t.Run("init without runtime-version flag with mariner images", func(t *testing.T) {
@@ -353,3 +365,14 @@ func verifyConfigs(t *testing.T, daprPath string) {
 		})
 	}
 }
+
+// verifyTCPLocalhost verifies a given localhost TCP port is being listened to.
+func verifyTCPLocalhost(t *testing.T, port int) {
+	// Check that the server is up and can accept connections.
+	endpoint := "127.0.0.1:" + strconv.Itoa(port)
+	conn, err := net.Dial("tcp", endpoint)
+	if err != nil {
+		t.Error("could not connect to "+endpoint, err)
+	}
+	defer conn.Close()
+}