Simple tests for tags

Signed-off-by: TheMode <themode@outlook.fr>

src/test/java/tag/TagTest.java

@@ -0,0 +1,37 @@
+package tag;
+
+import net.minestom.server.tag.Tag;
+import net.minestom.server.tag.TagHandler;
+import net.minestom.server.tag.TagReadable;
+import org.jglrxavpok.hephaistos.nbt.NBTCompound;
+import org.jglrxavpok.hephaistos.nbt.mutable.MutableNBTCompound;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TagTest {
+
+    @Test
+    public void testTag() {
+        var mutable = new MutableNBTCompound();
+        mutable.setInt("key", 5);
+        var tag = Tag.Integer("key");
+        var handler = TagHandler.fromCompound(new MutableNBTCompound());
+        handler.setTag(tag, 5);
+        assertEquals(mutable.toCompound(), handler.getTag(Tag.NBT), "NBT is not the same");
+
+        // Removal
+        handler.setTag(tag, null);
+        assertEquals(new NBTCompound(), handler.getTag(Tag.NBT), "Tag must be removed when set to null");
+    }
+
+    @Test
+    public void testSnbt() {
+        var mutable = new MutableNBTCompound();
+        mutable.setInt("key", 5);
+
+        var reader = TagReadable.fromCompound(mutable);
+        final String snbt = reader.getTag(Tag.SNBT);
+        assertEquals(snbt, mutable.toCompound().toSNBT(), "SNBT is not the same");
+    }
+}