add test

hutool-core/src/test/java/cn/hutool/core/bean/BeanCopyMappingTest.java

@@ -0,0 +1,47 @@
+package cn.hutool.core.bean;
+
+import cn.hutool.core.bean.copier.CopyOptions;
+import cn.hutool.core.map.MapUtil;
+import lombok.Builder;
+import lombok.Data;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class BeanCopyMappingTest {
+
+	/**
+	 * https://gitee.com/dromara/hutool/issues/I4C48U <br>
+	 * 传递复制不要用注解别名，应该用动态映射
+	 */
+	@Test
+	public void copyPropertiesTest() {
+		final CopyOptions copyOptions = CopyOptions.create()
+				.setFieldMapping(MapUtil.of("car", "carNo"));
+
+		B b = B.builder().car("12312312").build();
+		A a = A.builder().build();
+		C c = C.builder().build();
+		BeanUtil.copyProperties(b, a, copyOptions);
+		BeanUtil.copyProperties(a, c);
+
+		Assert.assertEquals("12312312", c.getCarNo());
+	}
+
+	@Data
+	@Builder
+	public static class A {
+		private String carNo;
+	}
+
+	@Data
+	@Builder
+	public static class B {
+		private String car;
+	}
+
+	@Data
+	@Builder
+	public static class C {
+		private String carNo;
+	}
+}