Converted tests 558 & 559 to use the unit test framework as 1305

Test 558 was just a subset of 559 which is something that can be
easily added later.

tests/unit/Makefile.inc

@@ -3,10 +3,11 @@
 UNITFILES = curlcheck.h
 
 # These are all unit test programs
-noinst_PROGRAMS = unit1300 unit1301 unit1302 unit1303 unit1304
+noinst_PROGRAMS = unit1300 unit1301 unit1302 unit1303 unit1304 unit1305
 
 unit1300_SOURCES = unit1300.c $(UNITFILES)
 unit1301_SOURCES = unit1301.c $(UNITFILES)
 unit1302_SOURCES = unit1302.c $(UNITFILES)
 unit1303_SOURCES = unit1303.c $(UNITFILES)
 unit1304_SOURCES = unit1304.c $(UNITFILES)
+unit1305_SOURCES = unit1305.c $(UNITFILES)

tests/unit/unit1305.c

@@ -0,0 +1,131 @@
+/*****************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ */
+
+#include "test.h"
+
+#ifdef HAVE_SYS_SOCKET_H
+#  include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif
+#ifdef HAVE_NETDB_H
+#  include <netdb.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#  include <arpa/inet.h>
+#endif
+
+#define ENABLE_CURLX_PRINTF
+#include "curlx.h"
+
+#include "hash.h"
+#include "hostip.h"
+#include "curlcheck.h"
+
+#include "curl_memory.h"
+#include "memdebug.h" /* LAST include file */
+
+static struct SessionHandle *data;
+static struct curl_hash *hp;
+static char *data_key;
+static struct Curl_dns_entry *data_node;
+
+static CURLcode unit_setup( void )
+{
+  data = curl_easy_init();
+  if (!data)
+    return CURLE_OUT_OF_MEMORY;
+
+  hp = Curl_mk_dnscache();
+  if(!hp) {
+    curl_easy_cleanup(data);
+    curl_global_cleanup();
+    return CURLE_OUT_OF_MEMORY;
+  }
+  return CURLE_OK;
+}
+
+static void unit_stop( void )
+{
+  if (data_node) {
+    Curl_freeaddrinfo(data_node->addr);
+    free(data_node);
+  }
+  if (data_key)
+    free(data_key);
+
+  Curl_hash_destroy(hp);
+
+  curl_easy_cleanup(data);
+  curl_global_cleanup();
+}
+
+static Curl_addrinfo *fake_ai(void)
+{
+    static Curl_addrinfo *ai;
+    int ss_size;
+
+    ss_size = sizeof (struct sockaddr_in);
+
+    if((ai = calloc(1, sizeof(Curl_addrinfo))) == NULL)
+        return NULL;
+
+    if((ai->ai_canonname = strdup("dummy")) == NULL) {
+        free(ai);
+        return NULL;
+    }
+
+    if((ai->ai_addr = calloc(1, ss_size)) == NULL) {
+        free(ai->ai_canonname);
+        free(ai);
+        return NULL;
+    }
+
+    ai->ai_family = AF_INET;
+    ai->ai_addrlen = ss_size;
+
+    return ai;
+}
+
+static CURLcode create_node(void)
+{
+    data_key = aprintf("%s:%d", "dummy", 0);
+    if (!data_key)
+        return CURLE_OUT_OF_MEMORY;
+
+    data_node = calloc(1, sizeof(struct Curl_dns_entry));
+    if (!data_node)
+        return CURLE_OUT_OF_MEMORY;
+
+    data_node->addr = fake_ai();
+    if (!data_node->addr)
+        return CURLE_OUT_OF_MEMORY;
+
+    return CURLE_OK;
+}
+
+
+UNITTEST_START
+
+    struct Curl_dns_entry *nodep;
+    size_t key_len;
+
+    CURLcode rc = create_node();
+    abort_unless(rc == CURLE_OK, "data node creation failed");
+    key_len = strlen(data_key);
+
+    nodep = Curl_hash_add(hp, data_key, key_len+1, data_node);
+    abort_unless(nodep, "insertion into hash failed");
+    /* Freeing will now be done by Curl_hash_destroy */
+    data_node = NULL;
+
+    /* To do: test retrieval, deletion, edge conditions */
+
+UNITTEST_STOP