Add a test that getaddrinfo works when hints are NULL.

Bug: 1827911
Change-Id: I9e1b774c44c10a8c5391bcf3baf1607f50eaf214

tests/netdb_test.cpp

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+
+
+TEST(netdb, getaddrinfo_NULL_hints) {
+  addrinfo* ai = NULL;
+  ASSERT_EQ(0, getaddrinfo("localhost", "9999", NULL, &ai));
+  freeaddrinfo(ai);
+}