Run tests in serial and update multi-peer test (#269)

Updates test workflows with serial execution to avoid collision 
of ports and resource names.

Also, used -exec sudo flag for UNIX tests and removed not-needed
 limits configuration on Linux and added a 5 minutes timeout.

Updated the multi-peer tests in the client/internal/engine_test.go
 to provide proper validation when creating or starting 
a peer engine instance fails.

As some operations of the tests running on windows
 are slow, we will experiment with disabling the Defender before 
restoring cache and checkout a repository, then we reenable 
it to run the tests.

disabled extra logs for windows interface

.github/workflows/golang-test-darwin.yml

@@ -26,4 +26,4 @@ jobs:
         run: go mod tidy
 
       - name: Test
-        run: GOBIN=$(which go) && sudo --preserve-env=GOROOT $GOBIN test ./...
+        run: go test -exec sudo -timeout 5m -p 1 ./...

.github/workflows/golang-test-linux.yml

@@ -11,18 +11,18 @@ jobs:
         uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go-version }}
-      - name: update limits.d
-        run: |
-          cat <<'EOF' | sudo tee -a /etc/security/limits.d/wt.conf
-          root soft     nproc          65535
-          root hard     nproc          65535
-          root soft     nofile         65535
-          root hard     nofile         65535
-          $(whoami) soft     nproc          65535
-          $(whoami) hard     nproc          65535
-          $(whoami) soft     nofile         65535
-          $(whoami) hard     nofile         65535
-          EOF
+#      - name: update limits.d
+#        run: |
+#          cat <<'EOF' | sudo tee -a /etc/security/limits.d/wt.conf
+#          root soft     nproc          65535
+#          root hard     nproc          65535
+#          root soft     nofile         65535
+#          root hard     nofile         65535
+#          $(whoami) soft     nproc          65535
+#          $(whoami) hard     nproc          65535
+#          $(whoami) soft     nofile         65535
+#          $(whoami) hard     nofile         65535
+#          EOF
 
       - name: Cache Go modules
         uses: actions/cache@v2
@@ -39,4 +39,4 @@ jobs:
         run: go mod tidy
 
       - name: Test
-        run: GOBIN=$(which go) && sudo --preserve-env=GOROOT $GOBIN test ./...
+        run: go test -exec sudo -timeout 5m -p 1 ./...

.github/workflows/golang-test-windows.yml

@@ -22,6 +22,9 @@ jobs:
         go-version: [1.17.x]
     runs-on: windows-latest
     steps:
+      - name: disable defender
+        run: Set-MpPreference -DisableRealtimeMonitoring $true
+
       - name: Checkout code
         uses: actions/checkout@v2
 
@@ -39,13 +42,16 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-go-
 
+      - name: enable defender
+        run: Set-MpPreference -DisableRealtimeMonitoring $false
+
       - uses: actions/download-artifact@v2
         with:
           name: syso
           path: iface\
 
-      - name: Install modules
-        run: go mod tidy
+#      - name: Install modules
+#        run: go mod tidy
 
       - name: Test
-        run: go test -tags=load_wgnt_from_rsrc ./...
+        run: go test -tags=load_wgnt_from_rsrc -timeout 5m -p 1 ./...

client/internal/engine_test.go

@@ -308,11 +308,18 @@ func TestEngine_MultiplePeers(t *testing.T) {
 		go func() {
 			engine, err := createEngine(ctx, cancel, setupKey, j, mport, sport)
 			if err != nil {
+				wg.Done()
+				t.Errorf("unable to create the engine for peer %d with error %v", j, err)
 				return
 			}
 			mu.Lock()
 			defer mu.Unlock()
-			engine.Start() //nolint
+			err = engine.Start()
+			if err != nil {
+				t.Errorf("unable to start engine for peer %d with error %v", j, err)
+				wg.Done()
+				return
+			}
 			engines = append(engines, engine)
 			wg.Done()
 		}()
@@ -320,33 +327,39 @@ func TestEngine_MultiplePeers(t *testing.T) {
 
 	// wait until all have been created and started
 	wg.Wait()
+	if len(engines) != numPeers {
+		t.Fatal("not all peers was started")
+	}
 	// check whether all the peer have expected peers connected
 
 	expectedConnected := numPeers * (numPeers - 1)
+
 	// adjust according to timeouts
 	timeout := 50 * time.Second
 	timeoutChan := time.After(timeout)
+	ticker := time.NewTicker(time.Second)
+	defer ticker.Stop()
+loop:
 	for {
 		select {
 		case <-timeoutChan:
 			t.Fatalf("waiting for expected connections timeout after %s", timeout.String())
-			return
-		default:
+			break loop
+		case <-ticker.C:
+			totalConnected := 0
+			for _, engine := range engines {
+				totalConnected = totalConnected + len(engine.GetConnectedPeers())
+			}
+			if totalConnected == expectedConnected {
+				log.Infof("total connected=%d", totalConnected)
+				break loop
+			}
+			log.Infof("total connected=%d", totalConnected)
 		}
-		time.Sleep(time.Second)
-		totalConnected := 0
-		for _, engine := range engines {
-			totalConnected = totalConnected + len(engine.GetConnectedPeers())
-		}
-		if totalConnected == expectedConnected {
-			log.Debugf("total connected=%d", totalConnected)
-			break
-		}
-		log.Infof("total connected=%d", totalConnected)
 	}
-
 	// cleanup test
-	for _, peerEngine := range engines {
+	for n, peerEngine := range engines {
+		t.Logf("stopping peer with interface %s from multipeer test, loopIndex %d", peerEngine.wgInterface.Name, n)
 		errStop := peerEngine.mgmClient.Close()
 		if errStop != nil {
 			log.Infoln("got error trying to close management clients from engine: ", errStop)

iface/iface_windows.go

@@ -20,11 +20,6 @@ func (w *WGIface) Create() error {
 	}
 	w.Interface = adapter
 	luid := adapter.LUID()
-	err = adapter.SetLogging(driver.AdapterLogOn)
-	if err != nil {
-		err = fmt.Errorf("Error enabling adapter logging: %w", err)
-		return err
-	}
 	err = adapter.SetAdapterState(driver.AdapterStateUp)
 	if err != nil {
 		return err