From 8d9c49dafea3617f84aac401f12dda15dadc6dfd Mon Sep 17 00:00:00 2001
From: Piotr Idzik <65706193+vil02@users.noreply.github.com>
Date: Thu, 24 Aug 2023 19:49:02 +0200
Subject: [PATCH] Add `PalindromeSinglyLinkedListTest` (#4327)

---
 .../misc/PalindromeSinglyLinkedListTest.java  | 59 +++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 src/test/java/com/thealgorithms/misc/PalindromeSinglyLinkedListTest.java

diff --git a/src/test/java/com/thealgorithms/misc/PalindromeSinglyLinkedListTest.java b/src/test/java/com/thealgorithms/misc/PalindromeSinglyLinkedListTest.java
new file mode 100644
index 000000000..13be9e11e
--- /dev/null
+++ b/src/test/java/com/thealgorithms/misc/PalindromeSinglyLinkedListTest.java
@@ -0,0 +1,59 @@
+package com.thealgorithms.misc;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import com.thealgorithms.datastructures.lists.SinglyLinkedList;
+import org.junit.jupiter.api.Test;
+
+public class PalindromeSinglyLinkedListTest {
+    @Test
+    public void testWithEmptyList() {
+        assertTrue(PalindromeSinglyLinkedList.isPalindrome(new SinglyLinkedList()));
+    }
+
+    @Test
+    public void testWithSingleElement() {
+        var exampleList = new SinglyLinkedList();
+        exampleList.insert(100);
+        assertTrue(PalindromeSinglyLinkedList.isPalindrome(exampleList));
+    }
+
+    @Test
+    public void testWithListWithOddLengthPositive() {
+        var exampleList = new SinglyLinkedList();
+        exampleList.insert(1);
+        exampleList.insert(2);
+        exampleList.insert(1);
+        assertTrue(PalindromeSinglyLinkedList.isPalindrome(exampleList));
+    }
+
+    @Test
+    public void testWithListWithEvenLengthPositive() {
+        var exampleList = new SinglyLinkedList();
+        exampleList.insert(10);
+        exampleList.insert(20);
+        exampleList.insert(20);
+        exampleList.insert(10);
+        assertTrue(PalindromeSinglyLinkedList.isPalindrome(exampleList));
+    }
+
+    @Test
+    public void testWithListWithOddLengthNegative() {
+        var exampleList = new SinglyLinkedList();
+        exampleList.insert(1);
+        exampleList.insert(2);
+        exampleList.insert(2);
+        assertFalse(PalindromeSinglyLinkedList.isPalindrome(exampleList));
+    }
+
+    @Test
+    public void testWithListWithEvenLengthNegative() {
+        var exampleList = new SinglyLinkedList();
+        exampleList.insert(10);
+        exampleList.insert(20);
+        exampleList.insert(20);
+        exampleList.insert(20);
+        assertFalse(PalindromeSinglyLinkedList.isPalindrome(exampleList));
+    }
+}