Added contact presence offline test

tests/test_contact.c

@@ -100,3 +100,16 @@ void contact_string_when_default_resource(void **state)
     p_contact_free(contact);
     free(str);
 }
+
+void contact_presence_offline(void **state)
+{
+    PContact contact = p_contact_new("bob@server.com", "bob", NULL, "both",
+        "is offline", FALSE);
+
+    const char *presence = p_contact_presence(contact);
+
+    assert_string_equal("offline", presence);
+
+    p_contact_free(contact);
+
+}

tests/test_contact.h

@@ -5,3 +5,4 @@ void contact_jid_when_name_not_exists(void **state);
 void contact_string_when_name_exists(void **state);
 void contact_string_when_name_not_exists(void **state);
 void contact_string_when_default_resource(void **state);
+void contact_presence_offline(void **state);

tests/testsuite.c

@@ -265,6 +265,7 @@ int main(int argc, char* argv[]) {
         unit_test(contact_string_when_name_exists),
         unit_test(contact_string_when_name_not_exists),
         unit_test(contact_string_when_default_resource),
+        unit_test(contact_presence_offline),
     };
     return run_tests(tests);
 }