pom.xml

@@ -20,6 +20,20 @@
             <version>5.8.1</version>
             <scope>test</scope>
         </dependency>
+
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest</artifactId>
+            <version>2.2</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <version>5.11.0</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
 </project>

src/main/java/Action/LearnSpellAction.java

@@ -3,7 +3,7 @@ package Action;
 import Job.HasJob;
 import Job.Wizard;
 
-public class learnSpellAction implements Action {
+public class LearnSpellAction implements Action {
     @Override
     public void exectue(Actor actor) {
         Wizard wizard = requireWizard(actor);

src/main/java/Job/Wizard.java

@@ -10,8 +10,15 @@ import Combat.Spell;
 import java.util.Scanner;
 
 public class Wizard extends Job {
-    private static final Scanner scanner = new Scanner(System.in);
-    public Wizard() {super("Wizard");}
+    private final Scanner scanner;
+    public Wizard(Scanner scanner) {
+        super("Wizard");
+        this.scanner = scanner;
+    }
+
+    public Wizard() {
+        this(new Scanner(System.in));
+    }
 
     public void learnSpell(Actor actor) {
         if(actor instanceof HasSpellBook a ) {

src/test/java/InterestingTests.java

@@ -0,0 +1,73 @@
+import Action.Actor;
+import Combat.HasMana;
+import Combat.OffensiveDamageSpell;
+import Combat.Spell;
+import Entity.Entity;
+import Entity.Player;
+import Inventory.HasSpellBook;
+import Job.Wizard;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.util.List;
+import java.util.Scanner;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.*;
+import static org.mockito.Mockito.*;
+
+public class InterestingTests {
+
+    private Wizard wizard;
+
+    @BeforeEach
+    public void setup() {
+        wizard = new Wizard();
+    }
+
+    @Test
+    public void testCastSpell_successfulCast() {
+        Scanner testScanner = new Scanner(new ByteArrayInputStream("1\n".getBytes()));
+        wizard = new Wizard(testScanner);
+
+        Player player = new Player("Gandalf", wizard);
+
+        player.setMana(50);
+        player.setHealth(100);
+
+        OffensiveDamageSpell fireball = new OffensiveDamageSpell("Fireball", 20, 15);
+        player.getSpellBook().add(fireball);
+
+        int initialMana = player.getMana();
+        int initialHealth = player.getHealth();
+
+        wizard.castSpell(player);
+
+        assertThat(player.getMana(), is(initialMana - fireball.getCost()));
+        assertThat(player.getHealth(), is(initialHealth - fireball.getPotency()));
+    }
+
+    @Test
+    public void testCastSpell_notEnoughMana() {
+        Scanner testScanner = new Scanner(new ByteArrayInputStream("1\n".getBytes()));
+        wizard = new Wizard(testScanner);
+
+        Player player = new Player("Merlin", wizard);
+        player.setMana(10);
+        player.setHealth(100);
+
+        OffensiveDamageSpell fireball = new OffensiveDamageSpell("Fireball", 20, 15);
+        player.getSpellBook().add(fireball);
+
+        int initialMana = player.getMana();
+        int initialHealth = player.getHealth();
+
+        wizard.castSpell(player);
+
+        assertThat(player.getMana(),is(initialMana));
+        assertThat(player.getHealth(),is(initialHealth));
+    }
+}

src/test/java/MagicSystemTest.java

@@ -0,0 +1,61 @@
+import Action.CastAction;
+import Action.LearnSpellAction;
+import Combat.OffensiveDamageSpell;
+import Entity.Player;
+import Job.Wizard;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+public class MagicSystemTest {
+
+    private Player defaultPlayer() {
+        return new Player("Alex");
+    }
+
+    @Test void cant_cast_spell_without_being_wizard(){
+        var p = defaultPlayer();
+        CastAction action = new CastAction();
+        IllegalStateException exception = assertThrows(
+                IllegalStateException.class,
+                () -> action.exectue(p)
+        );
+
+        assertTrue(exception.getMessage().contains("cannot perform this action without being a Wizard"));
+    }
+
+    @Test void cant_learn_spell_without_being_wizard(){
+        var p = defaultPlayer();
+        LearnSpellAction action = new LearnSpellAction();
+        IllegalStateException exception = assertThrows(
+                IllegalStateException.class,
+                () -> action.exectue(p)
+        );
+        assertTrue(exception.getMessage().contains("cannot perform this action without being a Wizard"));
+    }
+
+    @Test void damage_spell_damages_target(){
+        var defaultSpell = new OffensiveDamageSpell("fireball", 20, 20);
+        var p = defaultPlayer();
+        p.setMana(30);
+        p.setHealth(30);
+        defaultSpell.cast(p, p);
+        assertEquals(10, p.getHealth());
+    }
+
+    @Test void damage_spell_drains_mana_from_caster(){
+        var defaultSpell = new OffensiveDamageSpell("fireball", 20, 20);
+        var p = defaultPlayer();
+        p.setMana(30);
+        p.setHealth(30);
+        defaultSpell.cast(p, p);
+        assertEquals(10, p.getMana());
+    }
+
+    @Test void cant_cast_spell_with_empty_spellbook(){
+        var p = defaultPlayer();
+        var job = new Wizard();
+        p.learnJob(job);
+        p.performAction(new CastAction());
+
+    }
+}

src/test/java/PlayerTest.java

@@ -1,5 +1,5 @@
 import Action.DigAction;
-import Action.learnSpellAction;
+import Action.LearnSpellAction;
 import Combat.OffensiveDamageSpell;
 import Entity.Position;
 import Job.Miner;
@@ -21,6 +21,18 @@ class PlayerTest {
         assertFalse(p.isAlive());
     }
 
+    @Test void get_health_returns_health() {
+        var p = defaultPlayer();
+        p.setHealth(10);
+        assertEquals(10, p.getHealth());
+    }
+
+    @Test void get_mana_returns_mana() {
+        var p = defaultPlayer();
+        p.setMana(10);
+        assertEquals(10, p.getMana());
+    }
+
     @Test
     public void can_change_position() {
         var p = defaultPlayer();
@@ -53,7 +65,7 @@ class PlayerTest {
         var job = new Wizard();
         var defaultSpell = new OffensiveDamageSpell("fireball", 20, 20);
         p.learnJob(job);
-        p.performAction(new learnSpellAction());
+        p.performAction(new LearnSpellAction());
         System.out.println(p.getSpellBook());
         assertTrue(p.getSpellBook().contains(defaultSpell));
     }