Added Test Implementation for the Getters of OMRAddrInfoNode

Added test implementations for per_thread_buffer_functionality test

- Added implementations to first create a hints structure, which
  relies on the per thread buffer structure and functions.
- Added values to hints, which is stored by per thread buffer
  and the element getters retrieves the values and compare
  them to values inserted.

Issue: eclipse-omr#4745

Signed-off-by: Haley Cao <haleycao88@hotmail.com>

fvtest/porttest/omrsockTest.cpp

@@ -104,14 +104,33 @@ TEST(PortSockTest, per_thread_buffer_functionality)
 	OMRPORT_ACCESS_FROM_OMRPORT(portTestEnv->getPortLibrary());
 
 	omrsock_addrinfo_t hints = NULL;
+	uint32_t length = 0;
 	int32_t family = 0;
-	int32_t sockType = 1;
-	int32_t protocol = 1;
-	int32_t flags = 0;
+	int32_t sockType = 0;
+	int32_t protocol = 0;
 
-	OMRPORTLIB->sock_getaddrinfo_create_hints(OMRPORTLIB, &hints, family, sockType, protocol, flags);
+	int32_t hintsFamily = 0;
+	int32_t hintsSockType = 1;
+	int32_t hintsProtocol = 1;
+	int32_t hintsFlags = 0;
+
+	OMRPORTLIB->sock_getaddrinfo_create_hints(OMRPORTLIB, &hints, hintsFamily, hintsSockType, hintsProtocol, hintsFlags);
 
 	ASSERT_NE(hints, (void *)NULL);
+
+	/* Get and verify elements of the newly created hints. */
+	OMRPORTLIB->sock_getaddrinfo_length(OMRPORTLIB, hints, &length);
+	EXPECT_EQ(length, 0);
+
+	OMRPORTLIB->sock_getaddrinfo_family(OMRPORTLIB, hints, &family, 0);
+	EXPECT_EQ(family, hintsFamily);
+
+	OMRPORTLIB->sock_getaddrinfo_socktype(OMRPORTLIB, hints, &sockType, 0);
+	EXPECT_EQ(sockType, hintsSockType);
+
+	OMRPORTLIB->sock_getaddrinfo_protocol(OMRPORTLIB, hints, &protocol, 0);
+	EXPECT_EQ(protocol, hintsProtocol);
+
 }
 
 /**