Enable clang-tidy as a sanity check, fix up all known failures

1 files changed, 2 insertions, 2 deletions

diff --git a/test/core/client_channel/resolvers/dns_resolver_test.cc b/test/core/client_channel/resolvers/dns_resolver_test.cc
index ef3c1b8216..4c040caeb9 100644
--- a/test/core/client_channel/resolvers/dns_resolver_test.cc
+++ b/test/core/client_channel/resolvers/dns_resolver_test.cc
@@ -39,7 +39,7 @@ static void test_succeeds(grpc_resolver_factory* factory, const char* string) {
   args.uri = uri;
   args.combiner = g_combiner;
   resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
-  GPR_ASSERT(resolver != NULL);
+  GPR_ASSERT(resolver != nullptr);
   GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_succeeds");
   grpc_uri_destroy(uri);
   grpc_exec_ctx_finish(&exec_ctx);
@@ -57,7 +57,7 @@ static void test_fails(grpc_resolver_factory* factory, const char* string) {
   args.uri = uri;
   args.combiner = g_combiner;
   resolver = grpc_resolver_factory_create_resolver(&exec_ctx, factory, &args);
-  GPR_ASSERT(resolver == NULL);
+  GPR_ASSERT(resolver == nullptr);
   grpc_uri_destroy(uri);
   grpc_exec_ctx_finish(&exec_ctx);
 }