add a test for the vortex special direction before touching that code.

src/direction.test.c

@@ -1,9 +1,16 @@
 #include <platform.h>
-#include "kernel/types.h"
+#include <kernel/types.h>
+
 #include "direction.h"
 #include "util/language.h"
 #include "tests.h"
 
+#include <kernel/config.h>
+#include <kernel/region.h>
+#include <kernel/unit.h>
+#include <kernel/race.h>
+#include <kernel/terrain.h>
+
 #include <CuTest.h>
 
 static void test_init_directions(CuTest *tc) {
@@ -56,6 +63,27 @@ static void test_get_direction_default(CuTest *tc) {
     CuAssertIntEquals(tc, D_EAST, get_direction("east", lang));
 }
 
+static void test_move_to_vortex(CuTest *tc) {
+    region *r1, *r2, *r = 0;
+    terrain_type *t_plain;
+    unit *u;
+    struct locale *lang;
+
+    test_cleanup();
+    lang = get_or_create_locale("en");
+    locale_setstring(lang, "vortex", "wirbel");
+    init_locale(lang);
+    register_special_direction("vortex");
+    t_plain = test_create_terrain("plain", LAND_REGION | FOREST_REGION | WALK_INTO | CAVALRY_REGION);
+    r1 = test_create_region(0, 0, t_plain);
+    r2 = test_create_region(5, 0, t_plain);
+    CuAssertPtrNotNull(tc, create_special_direction(r1, r2, 10, "", "vortex", true));
+    u = test_create_unit(test_create_faction(rc_get_or_create("hodor")), r1);
+    CuAssertIntEquals(tc, E_MOVE_NOREGION, movewhere(u, "barf", r1, &r));
+    CuAssertIntEquals(tc, E_MOVE_OK, movewhere(u, "wirbel", r1, &r));
+    CuAssertPtrEquals(tc, r2, r);
+}
+
 #define SUITE_DISABLE_TEST(suite, test) (void)test
 
 CuSuite *get_direction_suite(void)
@@ -64,6 +92,7 @@ CuSuite *get_direction_suite(void)
   SUITE_ADD_TEST(suite, test_init_direction);
   SUITE_ADD_TEST(suite, test_init_directions);
   SUITE_ADD_TEST(suite, test_finddirection);
+  SUITE_ADD_TEST(suite, test_move_to_vortex);
   SUITE_DISABLE_TEST(suite, test_get_direction_default);
   return suite;
 }

src/kernel/region.c

@@ -331,12 +331,12 @@ region *find_special_direction(const region * r, const char *token,
 }
 
 attrib *create_special_direction(region * r, region * rt, int duration,
-  const char *desc, const char *keyword)
+  const char *desc, const char *keyword, bool active)
 {
   attrib *a = a_add(&r->attribs, a_new(&at_direction));
   spec_direction *d = (spec_direction *) (a->data.v);
 
-  d->active = false;
+  d->active = active;
   d->x = rt->x;
   d->y = rt->y;
   d->duration = duration;

src/kernel/region.h

@@ -195,7 +195,7 @@ extern "C" {
   struct spec_direction *special_direction(const region * from,
     const region * to);
   struct attrib *create_special_direction(struct region *r, struct region *rt,
-    int duration, const char *desc, const char *keyword);
+    int duration, const char *desc, const char *keyword, bool active);
 
   int deathcount(const struct region *r);
   int chaoscount(const struct region *r);

src/spells/spells.c

@@ -3138,8 +3138,8 @@ static int sp_chaossuction(castorder * co)
   }
 
   /* TODO: implement with a building */
-  create_special_direction(r, rt, 2, "vortex_desc", "vortex");
+  create_special_direction(r, rt, 2, "vortex_desc", "vortex", false);
-  create_special_direction(rt, r, 2, "vortex_desc", "vortex");
+  create_special_direction(rt, r, 2, "vortex_desc", "vortex", false);
   new_border(&bt_chaosgate, r, rt);
 
   add_message(&r->msgs, msg_message("chaosgate_effect_1", "mage", mage));