Refactor: fixtures in its own files.

Added readme for creating tests.
Found and fixed interesting bugs in destroy_db when there is no world.
renamed the testfile to testrunner to make it clear it is actually running the texts. Also, made testrunner more focused on the actual running of the tests.
Added debug target to test makefile.

src/test/testrunner.h

@@ -1,27 +1,7 @@
 #ifndef TESTRUNNER_H
 #define TESTRUNNER_H
 
-#include "../conf.h"
-#include "../sysdep.h"
-#include "../structs.h"
-#include "../utils.h"
-#include "../comm.h"
-#include "../db.h"
-#include "../handler.h"
-#include "../screen.h"
-#include "../interpreter.h"
-#include "../spells.h"
-#include "../dg_scripts.h"
-#include "../act.h"
-#include "../class.h"
-#include "../fight.h"
-#include "../quest.h"
-#include "../mud_event.h"
-#include "../munit/munit.h"
-#include <stdarg.h>
-#include <stddef.h>
-#include <setjmp.h>
-#include <cmocka.h>
+#include "test.fixtures.h"
 
 /**
  * Utility macro for defining tests.
@@ -35,9 +15,15 @@
 #define STD_TEST(test_name, test_fun) { (char *)(test_name), (test_fun), NULL, NULL, MUNIT_TEST_OPTION_NONE, NULL }
 
 /*
- * test fixtures
+ * An "extended test" has setup or teardown but doesn't take any parameters.
+ * This is a utility macro for the test suite listing.
+*/
+#define EXT_TEST(test_name, test_fun, setup_fun, teardown_fun) { (char *)(test_name), (test_fun), (setup_fun), (teardown_fun), MUNIT_TEST_OPTION_NONE, NULL }
+
+
+/*
+ * Returns the latest messages sent through send_to_char() or act()
  */
-char_data *get_test_char();
 char *get_last_messages();
 
 #endif