Why test structure ensures clarity in JUnit - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a test method in JUnit 5.

JUnit

@[1]
public void testAddition() {
    int sum = 2 + 3;
    assertEquals(5, sum);
}

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

ATest

BBeforeEach

CAfterEach

DIgnore

Attempts:

3 left

💡 Hint

Common Mistakes

Using lifecycle annotations like @BeforeEach instead of @Test.

Forgetting the @Test annotation.

The @Test annotation marks a method as a test method in JUnit 5.

2fill in blank

medium

Complete the code to assert that two strings are equal in a JUnit test.

JUnit

assert[1]("hello", greeting);

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ANull

BTrue

CEquals

DSame

Attempts:

3 left

💡 Hint

Common Mistakes

Using assertTrue instead of assertEquals for equality.

Mixing up expected and actual parameters.

The assertEquals method checks if two values are equal in JUnit tests.

3fill in blank

hard

Fix the error in the test method declaration by completing the annotation.

JUnit

@org.junit.jupiter.api.[1]
void checkValue() {
    assertTrue(value > 0);
}

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ABeforeAll

BDisabled

CAfterAll

DTest

Attempts:

3 left

💡 Hint

Common Mistakes

Using lifecycle annotations like @BeforeAll or @AfterAll instead of @Test.

Missing the annotation entirely.

The correct annotation to mark a test method is @Test from JUnit Jupiter API.

4fill in blank

hard

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

JUnit

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

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ATest

BTrue

CFalse

DBeforeEach

Attempts:

3 left

💡 Hint

Common Mistakes

Using @BeforeEach instead of @Test.

Using assertFalse instead of assertTrue for checking empty list.

The method must be annotated with @Test and use assertTrue to check if the list is empty.

5fill in blank

hard

Fill all three blanks to write a test that verifies a string contains a substring.

JUnit

@[1]
public void testContains() {
    String text = "JUnit testing";
    assert[2](text.[3]("test"));
}

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

ATest

BTrue

Ccontains

DFalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using assertFalse instead of assertTrue.

Using wrong method name instead of contains.

The test method uses @Test annotation, asserts true for the condition, and calls contains on the string.