removing Roots deprecated Subjects field in tests (#6907)

Author: miledxz

Diff for: credentials/tls/certprovider/pemfile/watcher_test.go

@@ -26,8 +26,6 @@ import (
 	"testing"
 	"time"
 
-	"github.com/google/go-cmp/cmp"
-	"github.com/google/go-cmp/cmp/cmpopts"
 	"google.golang.org/grpc/credentials/tls/certprovider"
 	"google.golang.org/grpc/internal/grpctest"
 	"google.golang.org/grpc/internal/testutils"
@@ -63,15 +61,10 @@ func compareKeyMaterial(got, want *certprovider.KeyMaterial) error {
 		}
 	}
 
-	// x509.CertPool contains only unexported fields some of which contain other
-	// unexported fields. So usage of cmp.AllowUnexported() or
-	// cmpopts.IgnoreUnexported() does not help us much here. Also, the standard
-	// library does not provide a way to compare CertPool values. Comparing the
-	// subjects field of the certs in the CertPool seems like a reasonable
-	// approach.
-	if gotR, wantR := got.Roots.Subjects(), want.Roots.Subjects(); !cmp.Equal(gotR, wantR, cmpopts.EquateEmpty()) {
+	if gotR, wantR := got.Roots, want.Roots; !gotR.Equal(wantR) {
 		return fmt.Errorf("keyMaterial roots = %v, want %v", gotR, wantR)
 	}
+
 	return nil
 }
 

Diff for: credentials/tls/certprovider/store_test.go

@@ -28,8 +28,6 @@ import (
 	"testing"
 	"time"
 
-	"github.com/google/go-cmp/cmp"
-	"github.com/google/go-cmp/cmp/cmpopts"
 	"google.golang.org/grpc/internal/grpctest"
 	"google.golang.org/grpc/internal/testutils"
 	"google.golang.org/grpc/testdata"
@@ -162,15 +160,10 @@ func compareKeyMaterial(got, want *KeyMaterial) error {
 		}
 	}
 
-	// x509.CertPool contains only unexported fields some of which contain other
-	// unexported fields. So usage of cmp.AllowUnexported() or
-	// cmpopts.IgnoreUnexported() does not help us much here. Also, the standard
-	// library does not provide a way to compare CertPool values. Comparing the
-	// subjects field of the certs in the CertPool seems like a reasonable
-	// approach.
-	if gotR, wantR := got.Roots.Subjects(), want.Roots.Subjects(); !cmp.Equal(gotR, wantR, cmpopts.EquateEmpty()) {
+	if gotR, wantR := got.Roots, want.Roots; !gotR.Equal(wantR) {
 		return fmt.Errorf("keyMaterial roots = %v, want %v", gotR, wantR)
 	}
+
 	return nil
 }
 

Diff for: vet.sh

@@ -185,8 +185,6 @@ GetSafeRegexMatch
 GetSuffixMatch
 GetTlsCertificateCertificateProviderInstance
 GetValidationContextCertificateProviderInstance
-XXXXX TODO: Remove the below deprecation usages:
-Roots.Subjects
 XXXXX PleaseIgnoreUnused'
 
 echo SUCCESS