void testSpellCast() { Character character("TestCharacter"); Spell spell("Fireball", 50, 10); CastSpell(character, spell); CPPUNIT_ASSERT_EQUAL(40, character.getHealth()); }In this example, we create a character named TestCharacter and a spell named Fireball with 50 damage and a cost of 10 mana points. We then call the CastSpell function to simulate the character casting the spell. Finally, we use CPPUNIT_ASSERT_EQUAL to check that the character's health has been reduced by the spell's damage amount. The CastSpell function is included in the CPPUNIT package/library.