Add a first test case

src/main/java/com/Acrobot/ChestShop/Commands/Give.java

@@ -26,7 +26,7 @@ public class Give implements CommandExecutor {
             sender.sendMessage(Messages.prefix(Messages.ACCESS_DENIED));
             return true;
         }
-        
+
         if (args.length < 1) {
             return false;
         }

src/test/java/com/Acrobot/ChestShop/Tests/MaterialTest.java

@@ -0,0 +1,27 @@
+package com.Acrobot.ChestShop.Tests;
+
+import com.Acrobot.Breeze.Utils.MaterialUtil;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for {@link com.Acrobot.Breeze.Utils.MaterialUtil}
+ *
+ * @author Acrobot
+ */
+@RunWith(JUnit4.class)
+public class MaterialTest {
+
+    @Test
+    public void testForBlank() {
+        ItemStack air = new ItemStack(Material.AIR);
+
+        assertTrue(MaterialUtil.isEmpty(air));
+        assertTrue(MaterialUtil.isEmpty(null));
+    }
+}