use nullptr for cert providers in tests

test/cpp/server/credentials_test.cc

@@ -277,34 +277,18 @@ TEST(CredentialsTest, MultipleServerCredentialsOneCrlProviderDoesNotLeak) {
   EXPECT_NE(server_creds_2, nullptr);
 }
 
-TEST(
+TEST(CredentialsTest, TlsServerCredentialsWithGoodMinMaxTlsVersions) {
-    CredentialsTest,
+  grpc::experimental::TlsServerCredentialsOptions options(
-    TlsChannelCredentialsWithStaticDataCertificateProviderAndGoodMinMaxTlsVersions) {
+      /*certificate_provider=*/nullptr);
-  experimental::IdentityKeyCertPair key_cert_pair;
-  key_cert_pair.private_key = kIdentityCertPrivateKey;
-  key_cert_pair.certificate_chain = kIdentityCertContents;
-  std::vector<experimental::IdentityKeyCertPair> identity_key_cert_pairs;
-  identity_key_cert_pairs.emplace_back(key_cert_pair);
-  auto certificate_provider = std::make_shared<StaticDataCertificateProvider>(
-      kRootCertContents, identity_key_cert_pairs);
-  grpc::experimental::TlsServerCredentialsOptions options(certificate_provider);
   options.set_min_tls_version(grpc_tls_version::TLS1_2);
   options.set_max_tls_version(grpc_tls_version::TLS1_3);
   auto server_credentials = grpc::experimental::TlsServerCredentials(options);
   EXPECT_NE(server_credentials, nullptr);
 }
 
-TEST(
+TEST(CredentialsTest, TlsServerCredentialsWithBadMinMaxTlsVersions) {
-    CredentialsTest,
+  grpc::experimental::TlsServerCredentialsOptions options(
-    TlsChannelCredentialsWithStaticDataCertificateProviderAndBadMinMaxTlsVersions) {
+      /*certificate_provider=*/nullptr);
-  experimental::IdentityKeyCertPair key_cert_pair;
-  key_cert_pair.private_key = kIdentityCertPrivateKey;
-  key_cert_pair.certificate_chain = kIdentityCertContents;
-  std::vector<experimental::IdentityKeyCertPair> identity_key_cert_pairs;
-  identity_key_cert_pairs.emplace_back(key_cert_pair);
-  auto certificate_provider = std::make_shared<StaticDataCertificateProvider>(
-      kRootCertContents, identity_key_cert_pairs);
-  grpc::experimental::TlsServerCredentialsOptions options(certificate_provider);
   options.set_min_tls_version(grpc_tls_version::TLS1_3);
   options.set_max_tls_version(grpc_tls_version::TLS1_2);
   auto server_credentials = grpc::experimental::TlsServerCredentials(options);