//JavaClasses/src/test/java/mattrixwv/TestAlgorithms.java
//Matthew Ellison
// Created: 06-07-20
//Modified: 07-28-20
//This class holds many algorithms that I have found it useful to keep around
//As such all of the functions in here are static and meant to be used as stand alone functions
/*
Copyright (C) 2020  Matthew Ellison

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/


package mattrixwv;

import static org.junit.Assert.assertEquals;

import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;

import org.junit.Test;

import mattrixwv.exceptions.InvalidResult;


public class TestAlgorithms{
	@Test
	public void testGetPrimes(){
		//Test 1
		ArrayList<Integer> correctAnswer = new ArrayList<Integer>(Arrays.asList(2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97));
		Integer topNum = 100;
		ArrayList<Integer> answer = Algorithms.getPrimes(topNum);
		assertEquals("getPrimes Integer failed", correctAnswer, answer);

		//Test 2
		ArrayList<Long> longCorrectAnswer = new ArrayList<Long>(Arrays.asList(2L, 3L, 5L, 7L, 11L, 13L, 17L, 19L, 23L, 29L, 31L, 37L, 41L, 43L, 47L, 53L, 59L, 61L, 67L, 71L, 73L, 79L, 83L, 89L, 97L));
		Long longTopNum = 100L;
		ArrayList<Long> longAnswer = Algorithms.getPrimes(longTopNum);
		assertEquals("getPrimes Long failed", longCorrectAnswer, longAnswer);

		//Test 3
		ArrayList<BigInteger> bigCorrectAnswer = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(2), BigInteger.valueOf(3), BigInteger.valueOf(5), BigInteger.valueOf(7), BigInteger.valueOf(11), BigInteger.valueOf(13), BigInteger.valueOf(17), BigInteger.valueOf(19), BigInteger.valueOf(23), BigInteger.valueOf(29), BigInteger.valueOf(31), BigInteger.valueOf(37), BigInteger.valueOf(41), BigInteger.valueOf(43), BigInteger.valueOf(47), BigInteger.valueOf(53), BigInteger.valueOf(59), BigInteger.valueOf(61), BigInteger.valueOf(67), BigInteger.valueOf(71), BigInteger.valueOf(73), BigInteger.valueOf(79), BigInteger.valueOf(83), BigInteger.valueOf(89), BigInteger.valueOf(97)));
		BigInteger bigTopNum = BigInteger.valueOf(100);
		ArrayList<BigInteger> bigAnswer = Algorithms.getPrimes(bigTopNum);
		assertEquals("getPrimes BigInteger failed", bigCorrectAnswer, bigAnswer);
	}
	@Test
	public void testGetNumPrimes(){
		//Test 1
		ArrayList<Integer> correctAnswer = new ArrayList<Integer>(Arrays.asList(2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97));
		Integer numPrimes = 25;
		ArrayList<Integer> answer = Algorithms.getNumPrimes(numPrimes);
		assertEquals("getNumPrimes Integer failed", correctAnswer, answer);

		//Test 2
		ArrayList<Long> longCorrectAnswer = new ArrayList<Long>(Arrays.asList(2L, 3L, 5L, 7L, 11L, 13L, 17L, 19L, 23L, 29L, 31L, 37L, 41L, 43L, 47L, 53L, 59L, 61L, 67L, 71L, 73L, 79L, 83L, 89L, 97L));
		Long longNumPrimes = 25L;
		ArrayList<Long> longAnswer = Algorithms.getNumPrimes(longNumPrimes);
		assertEquals("getNumPrimes Long failed", longCorrectAnswer, longAnswer);

		//Test 3
		ArrayList<BigInteger> bigCorrectAnswer = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(2), BigInteger.valueOf(3), BigInteger.valueOf(5), BigInteger.valueOf(7), BigInteger.valueOf(11), BigInteger.valueOf(13), BigInteger.valueOf(17), BigInteger.valueOf(19), BigInteger.valueOf(23), BigInteger.valueOf(29), BigInteger.valueOf(31), BigInteger.valueOf(37), BigInteger.valueOf(41), BigInteger.valueOf(43), BigInteger.valueOf(47), BigInteger.valueOf(53), BigInteger.valueOf(59), BigInteger.valueOf(61), BigInteger.valueOf(67), BigInteger.valueOf(71), BigInteger.valueOf(73), BigInteger.valueOf(79), BigInteger.valueOf(83), BigInteger.valueOf(89), BigInteger.valueOf(97)));
		BigInteger bigNumPrimes = BigInteger.valueOf(25);
		ArrayList<BigInteger> bigAnswer = Algorithms.getNumPrimes(bigNumPrimes);
		assertEquals("getNumPrimes BigInteger failed", bigCorrectAnswer, bigAnswer);
	}
	@Test
	public void testGetFactors() throws InvalidResult{
		//Test 1
		ArrayList<Integer> correctAnswer = new ArrayList<Integer>(Arrays.asList(2, 2, 5, 5));
		Integer number = 100;
		ArrayList<Integer> answer = Algorithms.getFactors(number);
		assertEquals("getFactors Integer 1 failed", correctAnswer, answer);
		//Test 2
		correctAnswer = new ArrayList<Integer>(Arrays.asList(2, 7, 7));
		number = 98;
		answer = Algorithms.getFactors(number);
		assertEquals("getFactors Integer 2 failed", correctAnswer, answer);

		//Test 3
		ArrayList<Long> longCorrectAnswer = new ArrayList<Long>(Arrays.asList(2L, 2L, 5L, 5L));
		Long longNumber = 100L;
		ArrayList<Long> longAnswer = Algorithms.getFactors(longNumber);
		assertEquals("getFactors Long failed", longCorrectAnswer, longAnswer);

		//Test 4
		ArrayList<BigInteger> bigCorrectAnswer = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(2), BigInteger.valueOf(7), BigInteger.valueOf(7)));
		BigInteger bigNumber = BigInteger.valueOf(98);
		ArrayList<BigInteger> bigAnswer = Algorithms.getFactors(bigNumber);
		assertEquals("getFactors BigInteger failed", bigCorrectAnswer, bigAnswer);
	}
	@Test
	public void testGetDivisors(){
		//Test 1
		ArrayList<Integer> correctAnswer = new ArrayList<Integer>(Arrays.asList(1, 2, 4, 5, 10, 20, 25, 50, 100));
		Integer topNum = 100;
		ArrayList<Integer> answer = Algorithms.getDivisors(topNum);
		assertEquals("getDivisors Integer failed", correctAnswer, answer);

		//Test 2
		ArrayList<Long> longCorrectAnswer = new ArrayList<Long>(Arrays.asList(1L, 2L, 4L, 5L, 10L, 20L, 25L, 50L, 100L));
		Long longTopNum = 100L;
		ArrayList<Long> longAnswer = Algorithms.getDivisors(longTopNum);
		assertEquals("getDivisors Long failed", longCorrectAnswer, longAnswer);

		//Test 3
		ArrayList<BigInteger> bigCorrectAnswer = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(1), BigInteger.valueOf(2), BigInteger.valueOf(4), BigInteger.valueOf(5), BigInteger.valueOf(10), BigInteger.valueOf(20), BigInteger.valueOf(25), BigInteger.valueOf(50), BigInteger.valueOf(100)));
		BigInteger bigTopNum = BigInteger.valueOf(100);
		ArrayList<BigInteger> bigAnswer = Algorithms.getDivisors(bigTopNum);
		assertEquals("getDivisors BigInteger failed", bigCorrectAnswer, bigAnswer);
	}
	@Test
	public void testGetFib(){
		//Test 1
		Integer correctAnswer = 144;
		Integer number = 12;
		Integer answer = Algorithms.getFib(number);
		assertEquals("getDivisors Integer 1 failed", correctAnswer, answer);
		//Test 2
		correctAnswer = 6765;
		number = 20;
		answer = Algorithms.getFib(number);
		assertEquals("getDivisors Integer 2 failed", correctAnswer, answer);

		//Test 3
		Long longCorrectAnswer = 6765L;
		Long longNumber = 20L;
		Long longAnswer = Algorithms.getFib(longNumber);
		assertEquals("getDivisors Long failed", longCorrectAnswer, longAnswer);

		//Test 4
		BigInteger bigCorrectAnswer = new BigInteger("1070066266382758936764980584457396885083683896632151665013235203375314520604694040621889147582489792657804694888177591957484336466672569959512996030461262748092482186144069433051234774442750273781753087579391666192149259186759553966422837148943113074699503439547001985432609723067290192870526447243726117715821825548491120525013201478612965931381792235559657452039506137551467837543229119602129934048260706175397706847068202895486902666185435124521900369480641357447470911707619766945691070098024393439617474103736912503231365532164773697023167755051595173518460579954919410967778373229665796581646513903488154256310184224190259846088000110186255550245493937113651657039447629584714548523425950428582425306083544435428212611008992863795048006894330309773217834864543113205765659868456288616808718693835297350643986297640660000723562917905207051164077614812491885830945940566688339109350944456576357666151619317753792891661581327159616877487983821820492520348473874384736771934512787029218636250627816");
		BigInteger bigNumber = BigInteger.valueOf(4782);
		BigInteger bigAnswer = Algorithms.getFib(bigNumber);
		assertEquals("getDivisors BigInteger failed", bigCorrectAnswer, bigAnswer);
	}
	@Test
	public void testGetAllFib(){
		//Test 1
		ArrayList<Integer> correctAnswer = new ArrayList<Integer>(Arrays.asList(1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89));
		Integer highestNumber = 100;
		ArrayList<Integer> answer = Algorithms.getAllFib(highestNumber);
		assertEquals("getAllFib Integer 1 failed", correctAnswer, answer);

		//Test 2
		correctAnswer = new ArrayList<Integer>(Arrays.asList(1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987));
		highestNumber = 1000;
		answer = Algorithms.getAllFib(highestNumber);
		assertEquals("getAllFib Integer 2 failed", correctAnswer, answer);

		//Test 3
		ArrayList<Long> longCorrectAnswer = new ArrayList<Long>(Arrays.asList(1L, 1L, 2L, 3L, 5L, 8L, 13L, 21L, 34L, 55L, 89L, 144L, 233L, 377L, 610L, 987L));
		Long longHighestNumber = 1000L;
		ArrayList<Long> longAnswer = Algorithms.getAllFib(longHighestNumber);
		assertEquals("getAllFib Long failed", longCorrectAnswer, longAnswer);

		//Test 4
		ArrayList<BigInteger> bigCorrectAnswer = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(1), BigInteger.valueOf(1), BigInteger.valueOf(2), BigInteger.valueOf(3), BigInteger.valueOf(5), BigInteger.valueOf(8), BigInteger.valueOf(13), BigInteger.valueOf(21), BigInteger.valueOf(34), BigInteger.valueOf(55), BigInteger.valueOf(89)));
		BigInteger bigHighestNumber = BigInteger.valueOf(100);
		ArrayList<BigInteger> bigAnswer = Algorithms.getAllFib(bigHighestNumber);
		assertEquals("getAllFib BigInteger failed", bigCorrectAnswer, bigAnswer);
	}
	@Test
	public void testFactorial(){
		//Integer
		//Test 1
		Integer correctAnswer = 720;
		Integer number = 6;
		Integer answer = Algorithms.factorial(number);
		assertEquals("factorial Integer 1 failed", correctAnswer, answer);
		//Test 2
		correctAnswer = 479001600;
		number = 12;
		answer = Algorithms.factorial(number);
		assertEquals("factorial Integer 2 failed", correctAnswer, answer);

		//Long
		//Test 3
		Long correctAnswerLong = 720L;
		Long numberLong = 6L;
		Long answerLong = Algorithms.factorial(numberLong);
		assertEquals("factorial Long 1 failed", correctAnswerLong, answerLong);
		//Test 4
		correctAnswerLong = 479001600L;
		numberLong = 12L;
		answerLong = Algorithms.factorial(numberLong);
		assertEquals("factorial Long 2 failed", correctAnswerLong, answerLong);
		//Test 5
		correctAnswerLong = 2432902008176640000L;
		numberLong = 20L;
		answerLong = Algorithms.factorial(numberLong);
		assertEquals("factorial Long 3 failed", correctAnswerLong, answerLong);

		//BigInteger
		//Test 6
		BigInteger correctAnswerBig = BigInteger.valueOf(720L);
		BigInteger numberBig = BigInteger.valueOf(6);
		BigInteger answerBig = Algorithms.factorial(numberBig);
		assertEquals("factorial BigInteger 1 failed", correctAnswerBig, answerBig);
		//Test 7
		correctAnswerBig = BigInteger.valueOf(479001600L);
		numberBig = BigInteger.valueOf(12);
		answerBig = Algorithms.factorial(numberBig);
		assertEquals("factorial BigInteger 2 failed", correctAnswerBig, answerBig);
		//Test 8
		correctAnswerBig = BigInteger.valueOf(2432902008176640000L);
		numberBig = BigInteger.valueOf(20L);
		answerBig = Algorithms.factorial(numberBig);
		assertEquals("factorial BigInteger 3 failed", correctAnswerBig, answerBig);
		//Test 9
		correctAnswerBig = new BigInteger("265252859812191058636308480000000");
		numberBig = BigInteger.valueOf(30L);
		answerBig = Algorithms.factorial(numberBig);
		assertEquals("factorial BigInteger 4 failed", correctAnswerBig, answerBig);
	}
	@Test
	public void testGetSum(){
		//Test 1
		Integer correctAnswer = 0;
		ArrayList<Integer> numbers = new ArrayList<Integer>();
		Integer answer = Algorithms.getSum(numbers);
		assertEquals("getSum Integer 1 failed", correctAnswer, answer);
		//Test 2
		correctAnswer = 118;
		numbers = new ArrayList<Integer>(Arrays.asList(2, 2, 3, 3, 4, 4, 100));
		answer = Algorithms.getSum(numbers);
		assertEquals("getSum Integer 2 failed", correctAnswer, answer);

		//Test 3
		Long longCorrectAnswer = 118L;
		ArrayList<Long> longNumbers = new ArrayList<Long>(Arrays.asList(2L, 2L, 3L, 3L, 4L, 4L, 100L));
		Long longAnswer = Algorithms.getLongSum(longNumbers);
		assertEquals("getSum Long failed", longCorrectAnswer, longAnswer);

		//Test 4
		BigInteger bigCorrectAnswer = BigInteger.valueOf(118);
		ArrayList<BigInteger> bigNumbers = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(2), BigInteger.valueOf(2), BigInteger.valueOf(3), BigInteger.valueOf(3), BigInteger.valueOf(4), BigInteger.valueOf(4), BigInteger.valueOf(100)));
		BigInteger bigAnswer = Algorithms.getBigSum(bigNumbers);
		assertEquals("getSum BigInteger failed", bigCorrectAnswer, bigAnswer);
	}
	@Test
	public void testGetProd(){
		//Test 1
		Integer correctAnswer = 0;
		ArrayList<Integer> numbers = new ArrayList<Integer>();
		Integer answer = Algorithms.getProd(numbers);
		assertEquals("getProd Integer 1 failed", correctAnswer, answer);
		//Test 2
		correctAnswer = 57600;
		numbers = new ArrayList<Integer>(Arrays.asList(2, 2, 3, 3, 4, 4, 100));
		answer = Algorithms.getProd(numbers);
		assertEquals("getProd Integer 2 failed", correctAnswer, answer);

		//Test 3
		Long longCorrectAnswer = 57600L;
		ArrayList<Long> longNumbers = new ArrayList<Long>(Arrays.asList(2L, 2L, 3L, 3L, 4L, 4L, 100L));
		Long longAnswer = Algorithms.getLongProd(longNumbers);
		assertEquals("getProd Long failed", longCorrectAnswer, longAnswer);

		//Test 4
		BigInteger bigCorrectAnswer = BigInteger.valueOf(57600);
		ArrayList<BigInteger> bigNumbers = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(2), BigInteger.valueOf(2), BigInteger.valueOf(3), BigInteger.valueOf(3), BigInteger.valueOf(4), BigInteger.valueOf(4), BigInteger.valueOf(100)));
		BigInteger bigAnswer = Algorithms.getBigProd(bigNumbers);
		assertEquals("getProd BigInteger failed", bigCorrectAnswer, bigAnswer);
	}
	@Test
	public void testIsFound(){
		//Integer
		//Test 1
		Boolean correctAnswer = true;
		ArrayList<Integer> numbers = new ArrayList<Integer>(Arrays.asList(0, 1, 2, 3, 4, 5, 6, 7, 8, 9));
		Boolean answer = Algorithms.isFound(numbers, 0);
		assertEquals("isFound Integer 1 failed", correctAnswer, answer);
		//Test 2
		correctAnswer = true;
		numbers = new ArrayList<Integer>(Arrays.asList(0, 1, 2, 3, 4, 5, 6, 7, 8, 9));
		answer = Algorithms.isFound(numbers, 9);
		assertEquals("isFound Integer 2 failed", correctAnswer, answer);
		//Test 3
		correctAnswer = true;
		numbers = new ArrayList<Integer>(Arrays.asList(0, 1, 2, 3, 4, 5, 6, 7, 8, 9));
		answer = Algorithms.isFound(numbers, 5);
		assertEquals("isFound Integer 3 failed", correctAnswer, answer);
		//Test 4
		correctAnswer = false;
		numbers = new ArrayList<Integer>(Arrays.asList(0, 1, 2, 3, 4, 5, 6, 7, 8, 9));
		answer = Algorithms.isFound(numbers, 10);
		assertEquals("isFound Integer 4 failed", correctAnswer, answer);

		//Test 5
		correctAnswer = true;
		ArrayList<Long> longNumbers = new ArrayList<Long>(Arrays.asList(0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L));
		answer = Algorithms.isLongFound(longNumbers, 0L);
		assertEquals("isFound Long 1 failed", correctAnswer, answer);
		//Test 6
		correctAnswer = true;
		longNumbers = new ArrayList<Long>(Arrays.asList(0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L));
		answer = Algorithms.isLongFound(longNumbers, 9L);
		assertEquals("isFound Long 2 failed", correctAnswer, answer);
		//Test 7
		correctAnswer = true;
		longNumbers = new ArrayList<Long>(Arrays.asList(0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L));
		answer = Algorithms.isLongFound(longNumbers, 5L);
		assertEquals("isFound Long 3 failed", correctAnswer, answer);
		//Test 8
		correctAnswer = false;
		longNumbers = new ArrayList<Long>(Arrays.asList(0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L));
		answer = Algorithms.isLongFound(longNumbers, 10L);
		assertEquals("isFound Long 4 failed", correctAnswer, answer);

		//Test 9
		correctAnswer = true;
		ArrayList<BigInteger> bigNumbers = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(0L), BigInteger.valueOf(1L), BigInteger.valueOf(2L), BigInteger.valueOf(3L), BigInteger.valueOf(4L), BigInteger.valueOf(5L), BigInteger.valueOf(6L), BigInteger.valueOf(7L), BigInteger.valueOf(8L), BigInteger.valueOf(9L)));
		answer = Algorithms.isBigFound(bigNumbers, BigInteger.valueOf(0L));
		assertEquals("isFound BigInteger 1 failed", correctAnswer, answer);
		//Test 10
		correctAnswer = true;
		bigNumbers = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(0L), BigInteger.valueOf(1L), BigInteger.valueOf(2L), BigInteger.valueOf(3L), BigInteger.valueOf(4L), BigInteger.valueOf(5L), BigInteger.valueOf(6L), BigInteger.valueOf(7L), BigInteger.valueOf(8L), BigInteger.valueOf(9L)));
		answer = Algorithms.isBigFound(bigNumbers, BigInteger.valueOf(9L));
		assertEquals("isFound BigInteger 2 failed", correctAnswer, answer);
		//Test 11
		correctAnswer = true;
		bigNumbers = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(0L), BigInteger.valueOf(1L), BigInteger.valueOf(2L), BigInteger.valueOf(3L), BigInteger.valueOf(4L), BigInteger.valueOf(5L), BigInteger.valueOf(6L), BigInteger.valueOf(7L), BigInteger.valueOf(8L), BigInteger.valueOf(9L)));
		answer = Algorithms.isBigFound(bigNumbers, BigInteger.valueOf(5L));
		assertEquals("isFound BigInteger 3 failed", correctAnswer, answer);
		//Test 12
		correctAnswer = false;
		bigNumbers = new ArrayList<BigInteger>(Arrays.asList(BigInteger.valueOf(0L), BigInteger.valueOf(1L), BigInteger.valueOf(2L), BigInteger.valueOf(3L), BigInteger.valueOf(4L), BigInteger.valueOf(5L), BigInteger.valueOf(6L), BigInteger.valueOf(7L), BigInteger.valueOf(8L), BigInteger.valueOf(9L)));
		answer = Algorithms.isBigFound(bigNumbers, BigInteger.valueOf(10L));
		assertEquals("isFound BigInteger 4 failed", correctAnswer, answer);
	}
	@Test
	public void testGetPermutations(){
		//Test 1
		String permString = "012";
		ArrayList<String> correctAnswer = new ArrayList<String>(Arrays.asList("012", "021", "102", "120", "201", "210"));
		ArrayList<String> answer = Algorithms.getPermutations(permString);
		assertEquals("getPermutations failed", correctAnswer, answer);
	}
	@Test
	public void testFindNumOccurrence(){
		//Test 1
		String testString = "abcdefgdd";
		char testChar = 'a';
		long correctAnswer = 1;
		long answer = Algorithms.findNumOccurrence(testString, testChar);
		assertEquals(correctAnswer, answer);
		//Test 2
		testChar = 'd';
		correctAnswer = 3;
		answer = Algorithms.findNumOccurrence(testString, testChar);
		assertEquals(correctAnswer, answer);
		//Test 3
		testChar = 'h';
		correctAnswer = 0;
		answer = Algorithms.findNumOccurrence(testString, testChar);
		assertEquals(correctAnswer, answer);
	}
}