From 1b39f138ebd580e16c58298104bd3bac7030918a Mon Sep 17 00:00:00 2001
From: Hyunjin Choi <hyeonisism@gmail.com>
Date: Mon, 3 Feb 2020 23:34:47 +0900
Subject: [PATCH] Test ObjectUtils.containsElement()

This commit introduces a unit test for the containsElement() method
in ObjectUtils.

Closes gh-24428
---
 .../springframework/util/ObjectUtilsTests.java  | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/spring-core/src/test/java/org/springframework/util/ObjectUtilsTests.java b/spring-core/src/test/java/org/springframework/util/ObjectUtilsTests.java
index b07a5558c2..7e239d1cc9 100644
--- a/spring-core/src/test/java/org/springframework/util/ObjectUtilsTests.java
+++ b/spring-core/src/test/java/org/springframework/util/ObjectUtilsTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,6 +37,7 @@ import static org.springframework.util.ObjectUtils.isEmpty;
  * @author Juergen Hoeller
  * @author Rick Evans
  * @author Sam Brannen
+ * @author Hyunjin Choi
  */
 class ObjectUtilsTests {
 
@@ -806,6 +807,20 @@ class ObjectUtilsTests {
 			.withMessage("Constant [bogus] does not exist in enum type org.springframework.util.ObjectUtilsTests$Tropes");
 	}
 
+	@Test
+	void containsElement() {
+		String keyObject = "key";
+		String[] array = {"foo", "bar", "Bar", keyObject};
+
+		String fakeObject = "fake";
+
+		assertThat(ObjectUtils.containsElement(null, keyObject)).isFalse();
+
+		assertThat(ObjectUtils.containsElement(array, keyObject)).isTrue();
+
+		assertThat(ObjectUtils.containsElement(array, fakeObject)).isFalse();
+	}
+
 	private void assertEqualHashCodes(int expected, Object array) {
 		int actual = ObjectUtils.nullSafeHashCode(array);
 		assertThat(actual).isEqualTo(expected);