add test

hutool-core/src/test/java/cn/hutool/core/convert/ToBytesTest.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2023 looly(loolly@aliyun.com)
+ * Hutool is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *          http://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+package cn.hutool.core.convert;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ToBytesTest {
+	@Test
+	public void toBytesTest() {
+		final List<Byte> byteList = new ArrayList<>();
+		byteList.add((byte) 1);
+		byteList.add((byte) 2);
+		byteList.add((byte) 3);
+
+		final byte[] bytes = Convert.convert(byte[].class, byteList);
+		Assert.assertEquals(1, bytes[0]);
+		Assert.assertEquals(2, bytes[1]);
+		Assert.assertEquals(3, bytes[2]);
+	}
+}