[Bleeding] Added Potions API. Fixes BUKKIT-389

By: fullwall <fullwall@optusnet.com>

paper-api/src/test/java/org/bukkit/plugin/messaging/TestPlayer.java

@@ -1,6 +1,7 @@
 package org.bukkit.plugin.messaging;
 
 import java.net.InetSocketAddress;
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
@@ -23,6 +24,8 @@ import org.bukkit.permissions.Permission;
 import org.bukkit.permissions.PermissionAttachment;
 import org.bukkit.permissions.PermissionAttachmentInfo;
 import org.bukkit.plugin.Plugin;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.potion.PotionEffectType;
 import org.bukkit.util.Vector;
 
 public class TestPlayer implements Player {
@@ -621,4 +624,28 @@ public class TestPlayer implements Player {
     public boolean canSee(Player player) {
         throw new UnsupportedOperationException("Not supported yet.");
     }
+
+    public boolean addPotionEffect(PotionEffect effect) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    public boolean addPotionEffect(PotionEffect effect, boolean force) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    public boolean addPotionEffects(Collection<PotionEffect> effects) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    public boolean hasPotionEffect(PotionEffectType type) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    public void removePotionEffect(PotionEffectType type) {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
+
+    public Collection<PotionEffect> getActivePotionEffects() {
+        throw new UnsupportedOperationException("Not supported yet.");
+    }
 }

paper-api/src/test/java/org/bukkit/potion/PotionTest.java

@@ -0,0 +1,109 @@
+package org.bukkit.potion;
+
+import static org.junit.Assert.*;
+import static org.hamcrest.Matchers.is;
+
+import org.bukkit.Material;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.potion.Potion.Tier;
+import org.junit.Test;
+
+public class PotionTest {
+    @Test
+    public void applyToItemStack() {
+        Potion potion = new Potion(PotionType.POISON);
+        ItemStack stack = new ItemStack(Material.POTION, 1);
+        potion.apply(stack);
+        assertTrue(stack.getDurability() == potion.toDamageValue());
+    }
+
+    @Test
+    public void fromDamage() {
+        Potion potion = Potion.fromDamage(PotionType.POISON.getDamageValue());
+        assertTrue(potion.getType() == PotionType.POISON);
+        potion = Potion.fromDamage(PotionType.POISON.getDamageValue() | SPLASH_BIT);
+        assertTrue(potion.getType() == PotionType.POISON && potion.isSplash());
+        potion = Potion.fromDamage(0x25 /* Potion of Healing II */);
+        assertTrue(potion.getType() == PotionType.INSTANT_HEAL && potion.getTier() == Tier.TWO);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void illegalApplyToItemStack() {
+        Potion potion = new Potion(PotionType.POISON);
+        potion.apply(new ItemStack(Material.AIR, 1));
+    }
+
+    @Test
+    public void ItemStackConversion() {
+        Potion potion = new Potion(PotionType.POISON);
+        ItemStack itemstack = potion.toItemStack(1);
+        assertThat(itemstack.getType(), is(Material.POTION));
+        assertTrue(itemstack.getAmount() == 1);
+        assertTrue(itemstack.getDurability() == potion.toDamageValue());
+    }
+
+    @Test
+    public void setExtended() {
+        Potion potion = new Potion(PotionType.POISON);
+        assertFalse(potion.hasExtendedDuration());
+        potion.setHasExtendedDuration(true);
+        assertTrue(potion.hasExtendedDuration());
+        assertTrue((potion.toDamageValue() & EXTENDED_BIT) != 0);
+    }
+
+    @Test
+    public void setSplash() {
+        Potion potion = new Potion(PotionType.POISON);
+        assertFalse(potion.isSplash());
+        potion.setSplash(true);
+        assertTrue(potion.isSplash());
+        assertTrue((potion.toDamageValue() & SPLASH_BIT) != 0);
+    }
+
+    @Test
+    public void setTier() {
+        Potion potion = new Potion(PotionType.POISON);
+        assertThat(potion.getTier(), is(Tier.ONE));
+        potion.setTier(Tier.TWO);
+        assertThat(potion.getTier(), is(Tier.TWO));
+        assertTrue(potion.toDamageValue() == (PotionType.POISON.getDamageValue() | potion.getTier().getDamageBit()));
+    }
+
+    @Test
+    public void useNulls() {
+        try {
+            new Potion(null);
+            fail("cannot use null type in constructor");
+        } catch (IllegalArgumentException ex) {
+        }
+
+        try {
+            new Potion(PotionType.POISON, null);
+            fail("cannot use null tier in constructor");
+        } catch (IllegalArgumentException ex) {
+        }
+
+        Potion potion = new Potion(PotionType.POISON);
+        try {
+            potion.setTier(null);
+            fail("cannot set a null tier");
+        } catch (IllegalArgumentException ex) {
+        }
+
+        try {
+            potion.apply((ItemStack) null);
+            fail("cannot apply to a null itemstack");
+        } catch (IllegalArgumentException ex) {
+        }
+
+        try {
+            potion.apply((LivingEntity) null);
+            fail("cannot apply to a null entity");
+        } catch (IllegalArgumentException ex) {
+        }
+    }
+
+    private static final int EXTENDED_BIT = 0x40;
+    private static final int SPLASH_BIT = 0x4000;
+}