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How to write JUnit test code in Java for the Duplicate words finding function ?

—

by

anagendrakumar2020

in Java, JUnit5

This is the JUnit 5 solution to cover all kinds of inputs provided to find the duplicate words function. This Unit test executes tests for the ‘DuplicateWordsCheck’ function available in the class ‘DuplicateWordsJ8’.

package pack1;

import org.junit.Assert;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

class JunitTestDuplicateWordsJ8 {

	InputSentence inputSentence;
	Duplicatewords_Using_String DWUStrg;
	Duplicatewords_Using_Hashmap DWUHmp;
	Duplicatewords_Using_Collection DWUCfy;

	@BeforeEach
	void setUp() throws Exception {
		inputSentence = new InputSentence();
		DWUStrg = new Duplicatewords_Using_String();
		DWUHmp = new Duplicatewords_Using_Hashmap();
		DWUCfy = new Duplicatewords_Using_Collection();
	}

	@AfterEach
	void tearDown() throws Exception {
	}

	@Test
	@DisplayName("No repeats inputs should work")
	final void test1() {
		DWUStrg.DuplicateWordsCheck("No repeated words here");
		Assert.assertTrue(DWUStrg.fetchDuplicateStatusFlag());

		DWUHmp.DuplicateWordsCheck("Here also no repeats");
		Assert.assertTrue(DWUHmp.fetchDuplicateStatusFlag());

		DWUCfy.DuplicateWordsCheck("Same too nothing repeats");
		Assert.assertTrue(DWUCfy.fetchDuplicateStatusFlag());
	}

	@Test
	@DisplayName("Repeated words inputs should work")
	final void test2() {
		DWUStrg.DuplicateWordsCheck("repeated word repeated");
		Assert.assertFalse(DWUStrg.fetchDuplicateStatusFlag());

		DWUHmp.DuplicateWordsCheck("some words some times repeated");
		Assert.assertFalse(DWUHmp.fetchDuplicateStatusFlag());

		DWUCfy.DuplicateWordsCheck("was is not is");
		Assert.assertFalse(DWUCfy.fetchDuplicateStatusFlag());
	}

	@Test
	@DisplayName("Empty inputs should not be considered")
	final void test3() {
		DWUStrg.DuplicateWordsCheck("");
		Assert.assertTrue(DWUStrg.fetchDuplicateStatusFlag());

		DWUHmp.DuplicateWordsCheck("");
		Assert.assertTrue(DWUHmp.fetchDuplicateStatusFlag());

		DWUCfy.DuplicateWordsCheck("");
		Assert.assertTrue(DWUCfy.fetchDuplicateStatusFlag());
	}

	@Test
	@DisplayName("null inputs should not be considered")
	final void test4() {
		DWUStrg.DuplicateWordsCheck(null);
		Assert.assertFalse(DWUStrg.fetchDuplicateStatusFlag());

		DWUHmp.DuplicateWordsCheck(null);
		Assert.assertFalse(DWUHmp.fetchDuplicateStatusFlag());

		DWUCfy.DuplicateWordsCheck(null);
		Assert.assertFalse(DWUCfy.fetchDuplicateStatusFlag());
	}
}

Output:
Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_String DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_String'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: Input sentence is validated Successfully
The given input sentence is = 'No repeated words here'
No Duplicate words found in 'No repeated words here'

Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Hashmap DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_Hashmap'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: Input sentence is validated Successfully
The given input sentence is = 'Here also no repeats'
HashMap of words from the given input sentence
{no=1, repeats=1, Here=1, also=1}
No Duplicate words found in 'Here also no repeats'

Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Collection DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_Collection'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: Input sentence is validated Successfully
The given input sentence is = 'Same too nothing repeats'
No Duplicate words found in 'Same too nothing repeats'

Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_String DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_String'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: Input sentence is validated Successfully
The given input sentence is = 'repeated word repeated'
The word=repeated is repeated

Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Hashmap DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_Hashmap'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: Input sentence is validated Successfully
The given input sentence is = 'some words some times repeated'
HashMap of words from the given input sentence
{some=2, times=1, words=1, repeated=1}
The word=some is repeated 2 times

Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Collection DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_Collection'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: Input sentence is validated Successfully
The given input sentence is = 'was is not is'
The word=is repeated 2 times

Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_String DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_String'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: Input sentence is validated Successfully
The given input sentence is = ''
No Duplicate words found in ''

Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Hashmap DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_Hashmap'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: Input sentence is validated Successfully
The given input sentence is = ''
HashMap of words from the given input sentence
{=1}
No Duplicate words found in ''

Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Collection DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_Collection'
The given input sentence is = ''
No Duplicate words found in ''

Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: Input sentence is validated Successfully
Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_String DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_String'
Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_String DuplicateWordsCheck
INFO: The given Input sentence is null
Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Hashmap DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_Hashmap'
Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Hashmap DuplicateWordsCheck
INFO: The given Input sentence is null
Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Collection DuplicateWordsCheck
INFO: This method 'DuplicateWordsCheck' called from the Class 'pack1.JunitTestDuplicateWordsJ8'
Jan 20, 2023 9:14:55 PM pack1.InputSentence validateInputs
INFO: This method 'validateInputs()' called from the Class 'pack1.Duplicatewords_Using_Collection'
Jan 20, 2023 9:14:55 PM pack1.Duplicatewords_Using_Collection DuplicateWordsCheck
INFO: The given Input sentence is null

AfterEach Assert Assert.assertEquals Assert.assertFalse Assert.assertThrows Assert.assertTrue assertEquals Assertions BeforeEach DisplayName exception exception.getMessage() IZ0-808 IZ0-809 IZ0-810 Java certification Junit JUnit5 Jupiter 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() Sun Certified Java Professional tearDown() test Upgrade Java SE7 validations

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One response to “How to write JUnit test code in Java for the Duplicate words finding function ?”

How to find the Duplicate words in a given sentence ? – Java Ice Breakers

January 21, 2023

[…] The link to the JUnit5 test for this solution is here – https://javaicebreakers.com/2023/01/21/junit-test-duplicate-words/ […]

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