Java Ice Breakers

How to write JUnit test code in Java for the function finding Triplets who sum divisible by 9 from given array of Integers ?

—

by

anagendrakumar2020

in Java, JUnit5

This is the JUnit 5 solution to cover all kinds of inputs provided to find the Triplets whose sum divisible by 9 from an array of integers. This Unit test executes tests for the ‘ParseAnArrayInput’ function available in the class ‘TripletsSumDivBy9J8’.

package pack1;

import java.util.Arrays;
import java.util.List;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

class JunitTestTripletsSumDivBy9J8 {

	TripletsSumDivBy9_Using_Arrays TSDBUA;
	TripletsSumDivBy9_Using_Predicates TSDBUP;
	TripletsSumDivBy9_Using_Stream_and_Predicates TSDBUSP;

	@BeforeEach
	void setUp() throws Exception {
		TSDBUA = new TripletsSumDivBy9_Using_Arrays();
		TSDBUP = new TripletsSumDivBy9_Using_Predicates();
		TSDBUSP = new TripletsSumDivBy9_Using_Stream_and_Predicates();
	}

	@Test
	@DisplayName("Positive inputs - Exp value and Actual matches")
	void test1() {
		List<List<Integer>> expectedList1 = Arrays.asList(Arrays.asList(90, 9, 0), Arrays.asList(90, 9, 54),
				Arrays.asList(90, 0, 54), Arrays.asList(9, 0, 54));
		Assertions.assertEquals(expectedList1, TSDBUA.ParseAnArrayInput(new Integer[] { 90, 9, 0, 54, 32, 51 }));

		List<List<Integer>> expectedList2 = Arrays.asList(Arrays.asList(4, 13, 10), Arrays.asList(4, 13, 37),
				Arrays.asList(4, 15, 8), Arrays.asList(13, 15, 8), Arrays.asList(10, 15, 2), Arrays.asList(15, 2, 37));
		Assertions.assertEquals(expectedList2, TSDBUP.ParseAnArrayInput(new Integer[] { 4, 13, 10, 15, 2, 37, 8 }));

		List<List<Integer>> expectedList3 = Arrays.asList(Arrays.asList(14, 20, 11), Arrays.asList(14, 20, 29),
				Arrays.asList(14, 11, 29), Arrays.asList(14, 5, 17), Arrays.asList(20, 11, 5), Arrays.asList(20, 5, 29),
				Arrays.asList(11, 5, 29));
		Assertions.assertEquals(expectedList3, TSDBUSP.ParseAnArrayInput(new Integer[] { 14, 20, 11, 5, 29, 17, 58 }));
	}

	@Test
	@DisplayName("Negative inputs - Exp value and Actual does not matches")
	void test2() {
		List<List<Integer>> expectedList1 = Arrays.asList(Arrays.asList(190, 9, 40), Arrays.asList(90, 9, 54),
				Arrays.asList(90, 0, 54), Arrays.asList(9, 0, 54));
		Assertions.assertNotEquals(expectedList1, TSDBUA.ParseAnArrayInput(new Integer[] { 59, 0, 54, 32, 51 }));

		List<List<Integer>> expectedList2 = Arrays.asList(Arrays.asList(24, 63, 10), Arrays.asList(4, 13, 37),
				Arrays.asList(4, 15, 8), Arrays.asList(13, 15, 8), Arrays.asList(10, 15, 2), Arrays.asList(15, 2, 37));
		Assertions.assertNotEquals(expectedList2, TSDBUP.ParseAnArrayInput(new Integer[] { 4, 13, 10, 2, 37, 8 }));

		List<List<Integer>> expectedList3 = Arrays.asList(Arrays.asList(58, 9, 31), Arrays.asList(21, 5, 73),
				Arrays.asList(14, 11, 29), Arrays.asList(14, 5, 17), Arrays.asList(20, 11, 5), Arrays.asList(20, 5, 29),
				Arrays.asList(11, 5, 29));
		Assertions.assertNotEquals(expectedList3, TSDBUSP.ParseAnArrayInput(new Integer[] { 11, 5, 29, 17, 58 }));
	}

	@Test
	@DisplayName("Null Array inputs")
	void test3() {
		Assertions.assertEquals(Arrays.asList(), TSDBUA.ParseAnArrayInput(null));

		Assertions.assertEquals(Arrays.asList(), TSDBUP.ParseAnArrayInput(null));

		Assertions.assertEquals(Arrays.asList(), TSDBUSP.ParseAnArrayInput(null));
	}

	@Test
	@DisplayName("Empty Array inputs")
	void test4() {
		Assertions.assertEquals(Arrays.asList(), TSDBUA.ParseAnArrayInput(new Integer[] {}));

		Assertions.assertEquals(Arrays.asList(), TSDBUP.ParseAnArrayInput(new Integer[] {}));

		Assertions.assertEquals(Arrays.asList(), TSDBUSP.ParseAnArrayInput(new Integer[] {}));
	}
}

Output:

Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Arrays ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Arrays'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: The provided Input validated Successfully
The given input Array values are
[ 90 9 0 54 32 51 ]
[[90, 9, 0], [90, 9, 54], [90, 0, 54], [9, 0, 54]]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Predicates ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Predicates'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: The provided Input validated Successfully
The given input Array values are
[ 4 13 10 15 2 37 8 ]
[[4, 13, 10], [4, 13, 37], [4, 15, 8], [13, 15, 8], [10, 15, 2], [15, 2, 37]]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Stream_and_Predicates ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Stream_and_Predicates'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: The provided Input validated Successfully
The given input Array values are
14 20 11 5 29 17 58 
The triplets of numbers which are divisible by 9
[[14, 20, 11], [14, 20, 29], [14, 11, 29], [14, 5, 17], [20, 11, 5], [20, 5, 29], [11, 5, 29]]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Arrays ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Arrays'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: The provided Input validated Successfully
The given input Array values are
[ 59 0 54 32 51 ]
[]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Predicates ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Predicates'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: The provided Input validated Successfully
The given input Array values are
[ 4 13 10 2 37 8 ]
[[4, 13, 10], [4, 13, 37]]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Stream_and_Predicates ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Stream_and_Predicates'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: The provided Input validated Successfully
The given input Array values are
11 5 29 17 58 
The triplets of numbers which are divisible by 9
[[11, 5, 29]]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Arrays ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Arrays'
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Arrays ParseAnArrayInput
INFO: The given Input Array is null
[]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Predicates ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Predicates'
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Predicates ParseAnArrayInput
INFO: The given Input Array is null
[]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Stream_and_Predicates ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Stream_and_Predicates'
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Stream_and_Predicates ParseAnArrayInput
INFO: The given Input Array is null
[]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Arrays ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Arrays'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: The provided Input validated Successfully
The given input Array values are
[ ]
[]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Predicates ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Predicates'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: The provided Input validated Successfully
The given input Array values are
[ ]
[]
Mar 10, 2023 12:22:04 PM pack1.TripletsSumDivBy9_Using_Stream_and_Predicates ParseAnArrayInput
INFO: This method 'ParseAnArrayInput' called from the Class 'pack1.JunitTestTripletsSumDivBy9J8'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.TripletsSumDivBy9_Using_Stream_and_Predicates'
Mar 10, 2023 12:22:04 PM pack1.ArrayInput validateInputs
INFO: The provided Input validated Successfully
The given input Array values are

The triplets of numbers which are divisible by 9
[]

AfterEach Arrays.asList(Arrays.asList()) Assert Assert.assertArrayEquals Assert.assertEquals Assert.assertFalse Assert.assertThrows Assert.assertTrue assertEquals Assertions Assertions.assertEquals Assertions.assertNotEquals BeforeEach DisplayName exception exception.getMessage() IZ0-808 IZ0-809 IZ0-810 Java certification Junit JUnit5 Jupiter List<List<Integer>> new Integer[] { 14 new Integer[] {} OCA Java Programmer 1 OCA Java Programmer 2 OCA Java SE8 OCP Java SE8 Oracle Certified Associate Java SE8 Oracle Certified Professional Java SE8 setUp() split Sun Certified Java Professional tearDown() test Upgrade Java SE7 validations

Comments

One response to “How to write JUnit test code in Java for the function finding Triplets who sum divisible by 9 from given array of Integers ?”

How to find Triplets whose sum is divisible by 9 from the given array of Integers ? – Java Ice Breakers

May 7, 2023

[…] The link to the JUnit5 test for this solution is here – https://javaicebreakers.com/2023/03/10/junit-test-finding-triplets-sum-divisible-by-9/ […]

LikeLike

Reply

Leave a comment Cancel reply