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Added jUnit for findAllAnagramsInText method, and for 'merge' method in class MergeIntervals#44

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85 changes: 85 additions & 0 deletionssrc/main/java/com/leetcode/arrays/MergeIntervalsTestCase.java
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package com.leetcode.arrays;

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 MergeIntervalsTestCase {

@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 case 1: Non-overlapping intervals
@Test
public void testMerge_NonOverlapping() {
int[][] intervals = {{1, 3}, {4, 6}, {7, 9}};
int[][] expected = {{1, 3}, {4, 6}, {7, 9}};
Assertions.assertArrayEquals(expected, MergeIntervals.merge(intervals));
}

// Test case 2: Overlapping intervals
@Test
public void testMerge_Overlapping() {
int[][] intervals = {{1, 4}, {2, 5}, {6, 8}};
int[][] expected = {{1, 5}, {6, 8}};
Assertions.assertArrayEquals(expected, MergeIntervals.merge(intervals));
}

// Test case 3: Empty input
@Test
public void testMerge_EmptyInput() {
int[][] intervals = {};
int[][] expected = {};
Assertions.assertArrayEquals(expected, MergeIntervals.merge(intervals));
}

// Test case 4: Single interval
@Test
public void testMerge_SingleInterval() {
int[][] intervals = {{2, 6}};
int[][] expected = {{2, 6}};
Assertions.assertArrayEquals(expected, MergeIntervals.merge(intervals));
}

// Test case 5: Overlapping intervals with different orders
@Test
public void testMerge_DifferentOrders() {
int[][] intervals = {{9, 12}, {1, 4}, {6, 8}, {2, 5}};
int[][] expected = {{1, 5}, {6, 8}, {9, 12}};
Assertions.assertArrayEquals(expected, MergeIntervals.merge(intervals));
}

// Test case 6: There are many overlapping time periods
@Test
public void testMerge_ManyOverlapping() {
int[][] intervals = {{1, 4}, {2, 5}, {3, 8}, {6, 9}};
int[][] expected = {{1, 9}};
Assertions.assertArrayEquals(expected, MergeIntervals.merge(intervals));
}
}
99 changes: 99 additions & 0 deletionssrc/main/java/com/leetcode/strings/AnagramsTestCase.java
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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);
}



}
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