Added jUnit for findAllAnagramsInText method

With the condition, you have to change the access scope of the method findAllAnagramsInText.

Author: quangrandz

src/main/java/com/leetcode/strings/AnagramsTestCase.java

@@ -0,0 +1,99 @@
+package com.leetcode.strings;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+/**
+*
+* @author: quangrandz
+* @since: 2023-6-30
+*/
+
+
+public class AnagramsTestCase {
+	@BeforeAll
+    public static void beforeAll() {
+        System.out.println("BEFORE ALL");
+    }
+    
+    @AfterAll
+    public static void afterAll() {
+        System.out.println("AFTER ALL");
+    }
+    
+    @BeforeEach
+    public void beforeEach() {
+        System.out.println("BEFORE EACH");
+    }
+    
+    @AfterEach
+    public void afterEach() {
+        System.out.println("AFTER EACH");
+    }
+    
+    @Test
+    public void testFindAllAnagramsInText() {
+        String text = "cbaebabacd";
+        String pattern = "abc";
+        List<Integer> expected = Arrays.asList(0, 6);
+        
+        List<Integer> result = AnagramsInString.findAllAnagramsInText(text, pattern);
+        
+        Assertions.assertEquals(expected, result);
+    }
+    
+    @Test
+    public void testFindAllAnagramsInText_NoAnagramFound() {
+        String text = "abcd";
+        String pattern = "xyz";
+        List<Integer> expected = Collections.emptyList();
+        
+        List<Integer> result = AnagramsInString.findAllAnagramsInText(text, pattern);
+        
+        Assertions.assertEquals(expected, result);
+    }
+    
+    @Test
+    public void testFindAllAnagramsInText_EmptyText() {
+        String text = "";
+        String pattern = "abc";
+        List<Integer> expected = Collections.emptyList();
+        
+        List<Integer> result = AnagramsInString.findAllAnagramsInText(text, pattern);
+        
+        Assertions.assertEquals(expected, result);
+    }
+
+    @Test
+    public void testFindAllAnagramsInText_EmptyPattern() {
+        String text = "abc";
+        String pattern = "";
+        List<Integer> expected = Arrays.asList(1,2,3);
+        
+        List<Integer> result = AnagramsInString.findAllAnagramsInText(text, pattern);
+        
+        Assertions.assertEquals(expected, result);
+    }
+
+    @Test
+    public void testFindAllAnagramsInText_LongPattern() {
+        String text = "cbaebabacd";
+        String pattern = "abcabcabc";
+        List<Integer> expected = Collections.emptyList();
+        
+        List<Integer> result = AnagramsInString.findAllAnagramsInText(text, pattern);
+        
+        Assertions.assertEquals(expected, result);
+    }
+
+    
+    
+}