cmd/internal/moddeps: fix test fail when the last element of GOROOT start with a dot or underscore

Fixes #54221 Change-Id: Id16f553251daf0b7c51f45232a4133f7dfb1ebb9 GitHub-Last-Rev: 675c2bf GitHub-Pull-Request: #65298 Reviewed-on: https://go-review.googlesource.com/c/go/+/558696 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com>

Author: qiulaidongfeng

src/cmd/internal/moddeps/moddeps_test.go

@@ -454,7 +454,7 @@ func findGorootModules(t *testing.T) []gorootModule {
 if err != nil {
 return err
 }
-if info.IsDir() && (info.Name() == "vendor" || info.Name() == "testdata") {
+if info.IsDir() && path != root && (info.Name() == "vendor" || info.Name() == "testdata") {
 return filepath.SkipDir
 }
 if info.IsDir() && path == filepath.Join(testenv.GOROOT(t), "pkg") {
@@ -465,7 +465,7 @@ func findGorootModules(t *testing.T) []gorootModule {
 // running time of this test anyway.)
 return filepath.SkipDir
 }
-if info.IsDir() && (strings.HasPrefix(info.Name(), "_") || strings.HasPrefix(info.Name(), ".")) {
+if info.IsDir() && path != root && (strings.HasPrefix(info.Name(), "_") || strings.HasPrefix(info.Name(), ".")) {
 // _ and . prefixed directories can be used for internal modules
 // without a vendor directory that don't contribute to the build
 // but might be used for example as code generators.