Java/src/test/java/com/thealgorithms/maths/KaprekarNumbersTest.java

package com.thealgorithms.maths;

import org.junit.jupiter.api.Test;
import java.util.ArrayList;
import static org.junit.jupiter.api.Assertions.*;

public class KaprekarNumbersTest {

	@Test
	void testFor1() 
	{
		assertTrue(KaprekarNumbers.isKaprekarNumber(1));
	}

	@Test
	void testFor45() 
	{
		assertTrue(KaprekarNumbers.isKaprekarNumber(45));
	}

	@Test
	void testFor297() 
	{
		assertTrue(KaprekarNumbers.isKaprekarNumber(297));
	}

	@Test
	void testFor2223() 
	{
		assertTrue(KaprekarNumbers.isKaprekarNumber(2223));
	}

	@Test
	void testFor857143() 
	{
		assertTrue(KaprekarNumbers.isKaprekarNumber(857143));
	}


	@Test
	void testFor3() 
	{
		assertFalse(KaprekarNumbers.isKaprekarNumber(3));
	}

	@Test
	void testFor26() 
	{
		assertFalse(KaprekarNumbers.isKaprekarNumber(26));
	}

	@Test
	void testFor98() 
	{
		assertFalse(KaprekarNumbers.isKaprekarNumber(98));
	}

	@Test
	void testForRangeOfNumber() { try {
		ArrayList<Long> rangedNumbers = KaprekarNumbers.kaprekarNumberInRange(1,100000);
		long[] allTheNumbers = {1, 9, 45, 55, 99, 297, 703, 999, 2223, 2728, 4950, 5050, 7272, 7777, 9999, 17344, 22222, 77778, 82656, 95121, 99999};
		for (long i:allTheNumbers) {
			assert rangedNumbers.contains(i);
		}
	} catch (Exception e) {
		assert false;
	}
	}

}