From e4ea0e8b4d3fd2c6601cbaf49b2d9f14e4f31cb3 Mon Sep 17 00:00:00 2001
From: Looly <loolly@aliyun.com>
Date: Sun, 23 Nov 2025 23:22:39 +0800
Subject: [PATCH] add test

---
 .../cn/hutool/v7/core/util/TypeUtilTest.java  | 81 ++++++++++++++++---
 1 file changed, 70 insertions(+), 11 deletions(-)

diff --git a/hutool-core/src/test/java/cn/hutool/v7/core/util/TypeUtilTest.java b/hutool-core/src/test/java/cn/hutool/v7/core/util/TypeUtilTest.java
index f280e3012..edd5e0302 100644
--- a/hutool-core/src/test/java/cn/hutool/v7/core/util/TypeUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/v7/core/util/TypeUtilTest.java
@@ -16,46 +16,50 @@
 
 package cn.hutool.v7.core.util;
 
-import lombok.Data;
+import cn.hutool.v7.core.array.ArrayUtil;
 import cn.hutool.v7.core.reflect.FieldUtil;
 import cn.hutool.v7.core.reflect.TypeReference;
 import cn.hutool.v7.core.reflect.TypeUtil;
 import cn.hutool.v7.core.reflect.method.MethodUtil;
-import org.junit.jupiter.api.Assertions;
+import lombok.Data;
 import org.junit.jupiter.api.Test;
 
+import java.lang.reflect.Array;
+import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.lang.reflect.Type;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
+import static org.junit.jupiter.api.Assertions.*;
+
 public class TypeUtilTest {
 
 	@Test
 	void getMapClassTest() {
 		final Class<?> aClass = TypeUtil.getClass(new TypeReference<Map<String, String>>() {});
-		Assertions.assertEquals(Map.class, aClass);
+		assertEquals(Map.class, aClass);
 	}
 
 	@Test
 	public void getEleTypeTest() {
 		final Method method = MethodUtil.getMethod(TestClass.class, "getList");
 		final Type type = TypeUtil.getReturnType(method);
-		Assertions.assertEquals("java.util.List<java.lang.String>", type.toString());
+		assertEquals("java.util.List<java.lang.String>", type.toString());
 
 		final Type type2 = TypeUtil.getTypeArgument(type);
-		Assertions.assertEquals(String.class, type2);
+		assertEquals(String.class, type2);
 	}
 
 	@Test
 	public void getParamTypeTest() {
 		final Method method = MethodUtil.getMethod(TestClass.class, "intTest", Integer.class);
 		final Type type = TypeUtil.getParamType(method, 0);
-		Assertions.assertEquals(Integer.class, type);
+		assertEquals(Integer.class, type);
 
 		final Type returnType = TypeUtil.getReturnType(method);
-		Assertions.assertEquals(Integer.class, returnType);
+		assertEquals(Integer.class, returnType);
 	}
 
 	public static class TestClass {
@@ -72,7 +76,7 @@ public class TypeUtilTest {
 	public void getTypeArgumentTest(){
 		// 测试不继承父类，而是实现泛型接口时是否可以获取成功。
 		final Type typeArgument = TypeUtil.getTypeArgument(IPService.class);
-		Assertions.assertEquals(String.class, typeArgument);
+		assertEquals(String.class, typeArgument);
 	}
 
 	public interface OperateService<T> {
@@ -91,7 +95,7 @@ public class TypeUtilTest {
 		final Type idType = TypeUtil.getActualType(Level3.class,
 				FieldUtil.getField(Level3.class, "id"));
 
-		Assertions.assertEquals(Long.class, idType);
+		assertEquals(Long.class, idType);
 	}
 
 	@Test
@@ -99,12 +103,12 @@ public class TypeUtilTest {
 		Method method = MethodUtil.getMethod(Parent.class, "getLevel");
 		Type returnType = TypeUtil.getReturnType(method);
 		Class<?> clazz = TypeUtil.getClass(returnType);
-		Assertions.assertEquals(Level1.class, clazz);
+		assertEquals(Level1.class, clazz);
 
 		method = MethodUtil.getMethod(Level1.class, "getId");
 		returnType = TypeUtil.getReturnType(method);
 		clazz = TypeUtil.getClass(returnType);
-		Assertions.assertEquals(Object.class, clazz);
+		assertEquals(Object.class, clazz);
 	}
 
 	public static class Level3 extends Level2<Level3>{
@@ -125,4 +129,59 @@ public class TypeUtilTest {
 		private T level;
 	}
 
+	/**
+	 * fix github:issue#3873
+	 */
+	@Test
+	public void getActualTypeForGenericArrayTest() {
+		TypeReference<GenericArray<GenericArrayEle>> typeReference = new TypeReference<GenericArray<GenericArrayEle>>() {
+
+		};
+
+		Type levelType = TypeUtil.getFieldType(GenericArray.class, "level");
+		Type actualType = TypeUtil.getActualType(typeReference.getType(), levelType);
+		assertEquals(ArrayUtil.getArrayType(GenericArrayEle.class), actualType);
+	}
+
+	@Data
+	public static class GenericArray<T> {
+		private T[] level;
+	}
+
+	@Data
+	public static class GenericArrayEle {
+		private Long uid;
+	}
+
+	/**
+	 * 测试getClass方法对泛型数组类型T[]的处理
+	 * 验证未绑定泛型参数的数组类型会被正确解析为Object[]
+	 */
+	@Test
+	public void getClassForGenericArrayTypeTest() throws NoSuchFieldException {
+		// 获取T[]类型字段的泛型类型
+		Field levelField = GenericArray.class.getDeclaredField("level");
+		Type genericArrayType = levelField.getGenericType();
+		// 调用getClass方法处理GenericArrayType
+		Class<?> clazz = TypeUtil.getClass(genericArrayType);
+		// 验证返回Object[]类型
+		assertNotNull(clazz, "getClass方法返回null");
+		assertTrue(clazz.isArray(), "返回类型不是数组");
+		assertEquals(Object.class, clazz.getComponentType(), "数组组件类型应为Object");
+	}
+
+	/**
+	 * 测试getClass方法对参数化类型数组List<String>[]的处理
+	 * 验证数组组件类型能正确解析为原始类型
+	 */
+	@Test
+	public void getClassForParameterizedArrayTypeTest() {
+		// 创建List<String>[]类型引用
+		Type genericArrayType = new TypeReference<List<String>[]>() {}.getType();
+		// 调用getClass方法处理GenericArrayType
+		Class<?> clazz = TypeUtil.getClass(genericArrayType);
+		// 验证返回List[]类型
+		assertEquals(Array.newInstance(List.class, 0).getClass(), clazz);
+	}
+
 }