From 41c540f4ca4debd37c94f5a5b835802cbdbba0dc Mon Sep 17 00:00:00 2001
From: Looly <loolly@gmail.com>
Date: Wed, 11 Dec 2019 10:46:54 +0800
Subject: [PATCH] add test

---
 .../src/main/java/cn/hutool/core/date/DateUtil.java    |  2 +-
 .../test/java/cn/hutool/core/date/DateUtilTest.java    | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java b/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
index 618f57b25..3146d3bf1 100644
--- a/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
@@ -1777,7 +1777,7 @@ public class DateUtil {
 	 * @param startDate   开始时间
 	 * @param dateField   时间单位
 	 * @param timeLength  时长
-	 * @param checkedDate 被比较的时间。如果经过时长后的时间晚于被检查的时间，就表示过期
+	 * @param checkedDate 被比较的时间，即有效期的截止时间。如果经过时长后的时间晚于被检查的时间，就表示过期
 	 * @return 是否过期
 	 * @since 3.1.1
 	 */
diff --git a/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
index d26c7f54b..d41733ac2 100644
--- a/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
@@ -2,6 +2,7 @@ package cn.hutool.core.date;
 
 import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.date.BetweenFormater.Level;
+import cn.hutool.core.lang.Console;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -624,4 +625,13 @@ public class DateUtilTest {
 		final int age = DateUtil.age(DateUtil.parseDate(d1), DateUtil.parseDate(d2));
 		Assert.assertEquals(18, age);
 	}
+
+	@Test
+	public void isExpiredTest(){
+		DateTime startDate = DateUtil.parse("2019-12-01 17:02:30");
+		DateTime endDate = DateUtil.parse("2019-12-02 17:02:30");
+		int length = 3;
+		boolean expired = DateUtil.isExpired(startDate, DateField.DAY_OF_YEAR, length, endDate);
+		Assert.assertTrue(expired);
+	}
 }