Add unit test

src/test/java/net/minestom/server/instance/BlockPlaceTest.java

@@ -0,0 +1,19 @@
+package net.minestom.server.instance;
+
+import net.minestom.server.instance.block.Block;
+import net.minestom.testing.Env;
+import net.minestom.testing.EnvTest;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
+@EnvTest
+public class BlockPlaceTest {
+
+    @Test
+    void testPlacementOutOfLimit(Env env) {
+        Instance instance = env.createFlatInstance();
+        assertDoesNotThrow(() -> instance.setBlock(0, instance.getDimensionType().getMaxY() + 1, 0, Block.STONE));
+        assertDoesNotThrow(() -> instance.setBlock(0, instance.getDimensionType().getMinY() - 1, 0, Block.STONE));
+    }
+}