Fix weird behaviour of Windows CI runners...

Author: cmaglie

Diff for: internal/integrationtest/environment.go

@@ -17,6 +17,7 @@ package integrationtest
 
 import (
 	"testing"
+	"time"
 
 	"github.com/arduino/go-paths-helper"
 	"github.com/stretchr/testify/require"
@@ -43,7 +44,13 @@ func NewEnvironment(t *testing.T) *Environment {
 		downloadsDir: downloadsDir,
 		t:            t,
 		cleanUp: func() {
-			require.NoError(t, rootDir.RemoveAll())
+			err := rootDir.RemoveAll()
+			if err != nil {
+				// Sometimes antivirus keep files opened, allow some extra time
+				// to see if the cleanup can be completed
+				time.Sleep(5 * time.Second)
+				require.NoError(t, rootDir.RemoveAll())
+			}
 		},
 	}
 }