CI pipeline test stage in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a JUnit test method.

JUnit

@Test
public void [1]() {
    assertEquals(4, 2 + 2);
}

Drag options to blanks, or click blank then click option'

Astart

Bmain

CrunTest

DtestAddition

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'main' as test method name

Using invalid method names

The method name testAddition clearly indicates the test purpose and is a valid JUnit test method name.

2fill in blank

medium

Complete the code to import the JUnit assertion class.

JUnit

import org.junit.[1];

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AAssert

BTest

CAssertions

DRule

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'Test' instead of 'Assert'

Using 'Assertions' which is JUnit 5

The Assert class contains assertion methods like assertEquals used in JUnit 4.

3fill in blank

hard

Fix the error in the test annotation.

JUnit

public class CalculatorTest {
    [1]
    public void testSum() {
        assertEquals(5, 2 + 3);
    }
}

Drag options to blanks, or click blank then click option'

A@Test

B@test

C@TestMethod

D@Testing

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase '@test'

Using non-existent annotations like '@TestMethod'

The correct JUnit annotation for test methods is @Test with uppercase 'T'.

4fill in blank

hard

Fill both blanks to create a test method that checks if a list is empty.

JUnit

@Test
public void [1]() {
    List<String> list = new ArrayList<>();
    assert[2](list.isEmpty());
}

Drag options to blanks, or click blank then click option'

AtestListEmpty

BassertTrue

CassertFalse

DcheckEmpty

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'assertFalse' which would fail the test

Using unclear method names

The method name testListEmpty describes the test. assertTrue checks that the list is empty.

5fill in blank

hard

Fill all three blanks to write a test method that verifies string length.

JUnit

@Test
public void [1]() {
    String text = "hello";
    assertEquals([2], text.[3]());
}

Drag options to blanks, or click blank then click option'

AtestStringLength

B5

Clength

Dsize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'size()' which is for collections

Wrong expected length value

The method name testStringLength describes the test. The expected length is 5. The method to get string length is length().