Set up inventory tests; add scroll usage tests

CMakeLists.txt

@@ -368,6 +368,7 @@ if(RUN_TESTS)
     SourceT/drlg_l4_test.cpp
     SourceT/effects_test.cpp
     SourceT/file_util_test.cpp
+    SourceT/inv_test.cpp
     SourceT/pack_test.cpp
     SourceT/player_test.cpp
     SourceT/scrollrt_test.cpp

SourceT/inv_test.cpp

@@ -0,0 +1,84 @@
+#include <gtest/gtest.h>
+#include "all.h"
+
+/* Set up a given item as a spell scroll, allowing for its usage. */
+void set_up_scroll(dvl::ItemStruct &item, dvl::spell_id spell)
+{
+	dvl::pcurs = dvl::CURSOR_HAND;
+	dvl::leveltype = dvl::DTYPE_CATACOMBS;
+	dvl::plr[dvl::myplr]._pRSpell = static_cast<dvl::spell_id>(spell);
+	item._itype = dvl::ITYPE_MISC;
+	item._iMiscId = dvl::IMISC_SCROLL;
+	item._iSpell = spell;
+}
+
+// Test that the scroll is used in the inventory in correct conditions
+TEST(Inv, UseScroll_from_inventory)
+{
+	set_up_scroll(dvl::plr[dvl::myplr].InvList[2], dvl::SPL_FIREBOLT);
+	dvl::plr[dvl::myplr]._pNumInv = 5;
+	EXPECT_TRUE(dvl::UseScroll());
+}
+
+// Test that the scroll is used in the belt in correct conditions
+TEST(Inv, UseScroll_from_belt)
+{
+	set_up_scroll(dvl::plr[dvl::myplr].SpdList[2], dvl::SPL_FIREBOLT);
+	EXPECT_TRUE(dvl::UseScroll());
+}
+
+// Test that the scroll is not used in the inventory for each invalid condition
+TEST(Inv, UseScroll_from_inventory_invalid_conditions)
+{
+	// Empty the belt to prevent using a scroll from the belt
+	for (int i = 0; i < MAXBELTITEMS; i++) {
+		dvl::plr[dvl::myplr].SpdList[i]._itype = dvl::ITYPE_NONE;
+	}
+
+	set_up_scroll(dvl::plr[dvl::myplr].InvList[2], dvl::SPL_FIREBOLT);
+	dvl::pcurs = dvl::CURSOR_IDENTIFY;
+	EXPECT_FALSE(dvl::UseScroll());
+
+	set_up_scroll(dvl::plr[dvl::myplr].InvList[2], dvl::SPL_FIREBOLT);
+	dvl::leveltype = dvl::DTYPE_TOWN;
+	EXPECT_FALSE(dvl::UseScroll());
+
+	set_up_scroll(dvl::plr[dvl::myplr].InvList[2], dvl::SPL_FIREBOLT);
+	dvl::plr[dvl::myplr]._pRSpell = static_cast<dvl::spell_id>(dvl::SPL_HEAL);
+	EXPECT_FALSE(dvl::UseScroll());
+
+	set_up_scroll(dvl::plr[dvl::myplr].InvList[2], dvl::SPL_FIREBOLT);
+	dvl::plr[dvl::myplr].InvList[2]._iMiscId = dvl::IMISC_STAFF;
+	EXPECT_FALSE(dvl::UseScroll());
+
+	set_up_scroll(dvl::plr[dvl::myplr].InvList[2], dvl::SPL_FIREBOLT);
+	dvl::plr[dvl::myplr].InvList[2]._itype = dvl::ITYPE_NONE;
+	EXPECT_FALSE(dvl::UseScroll());
+}
+
+// Test that the scroll is not used in the belt for each invalid condition
+TEST(Inv, UseScroll_from_belt_invalid_conditions)
+{
+	// Disable the inventory to prevent using a scroll from the inventory
+	dvl::plr[dvl::myplr]._pNumInv = 0;
+
+	set_up_scroll(dvl::plr[dvl::myplr].SpdList[2], dvl::SPL_FIREBOLT);
+	dvl::pcurs = dvl::CURSOR_IDENTIFY;
+	EXPECT_FALSE(dvl::UseScroll());
+
+	set_up_scroll(dvl::plr[dvl::myplr].SpdList[2], dvl::SPL_FIREBOLT);
+	dvl::leveltype = dvl::DTYPE_TOWN;
+	EXPECT_FALSE(dvl::UseScroll());
+
+	set_up_scroll(dvl::plr[dvl::myplr].SpdList[2], dvl::SPL_FIREBOLT);
+	dvl::plr[dvl::myplr]._pRSpell = static_cast<dvl::spell_id>(dvl::SPL_HEAL);
+	EXPECT_FALSE(dvl::UseScroll());
+
+	set_up_scroll(dvl::plr[dvl::myplr].SpdList[2], dvl::SPL_FIREBOLT);
+	dvl::plr[dvl::myplr].SpdList[2]._iMiscId = dvl::IMISC_STAFF;
+	EXPECT_FALSE(dvl::UseScroll());
+
+	set_up_scroll(dvl::plr[dvl::myplr].SpdList[2], dvl::SPL_FIREBOLT);
+	dvl::plr[dvl::myplr].SpdList[2]._itype = dvl::ITYPE_NONE;
+	EXPECT_FALSE(dvl::UseScroll());
+}