Selecting tests by tags and classes in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to run only tests tagged with "fast" using JUnit 5.

JUnit

LauncherDiscoveryRequest request = LauncherDiscoveryRequestBuilder.request()
    .selectors(DiscoverySelectors.selectClass(MyTests.class))
    .filters(TagFilter.includeTags("[1]"))
    .build();

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

Aintegration

Bfast

Cslow

Dunit

Attempts:

3 left

💡 Hint

Common Mistakes

Using a tag name that doesn't exist in the tests.

Using excludeTags instead of includeTags.

The TagFilter.includeTags("fast") ensures only tests tagged with "fast" run.

2fill in blank

medium

Complete the code to select tests from the class named "CalculatorTests".

JUnit

LauncherDiscoveryRequest request = LauncherDiscoveryRequestBuilder.request()
    .selectors(DiscoverySelectors.[1](CalculatorTests.class))
    .build();

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

AselectClass

BselectModule

CselectMethod

DselectPackage

Attempts:

3 left

💡 Hint

Common Mistakes

Using selectPackage which selects all classes in a package.

Using selectMethod which selects a single test method.

selectClass selects all tests inside the specified class.

3fill in blank

hard

Fix the error in the code to exclude tests tagged with "slow".

JUnit

LauncherDiscoveryRequest request = LauncherDiscoveryRequestBuilder.request()
    .selectors(DiscoverySelectors.selectClass(MyTests.class))
    .filters(TagFilter.[1]Tags("slow"))
    .build();

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

Ainclude

Bfilter

Cexclude

Dselect

Attempts:

3 left

💡 Hint

Common Mistakes

Using includeTags which runs only the tagged tests.

Using a non-existent method like filterTags.

To exclude tests with a tag, use TagFilter.excludeTags.

4fill in blank

hard

Fill both blanks to select tests from package "com.example" and include only tests tagged "integration".

JUnit

LauncherDiscoveryRequest request = LauncherDiscoveryRequestBuilder.request()
    .selectors(DiscoverySelectors.[1]("com.example"))
    .filters(TagFilter.[2]Tags("integration"))
    .build();

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

AselectPackage

Binclude

Cexclude

DselectClass

Attempts:

3 left

💡 Hint

Common Mistakes

Using selectClass instead of selectPackage for package selection.

Using excludeTags instead of includeTags.

selectPackage chooses all tests in the package, and includeTags filters to only those tagged "integration".

5fill in blank

hard

Fill all three blanks to select a test method "testAdd" in class "MathTests" and exclude tests tagged "slow".

JUnit

LauncherDiscoveryRequest request = LauncherDiscoveryRequestBuilder.request()
    .selectors(DiscoverySelectors.[1](MathTests.class, "[2]"))
    .filters(TagFilter.[3]Tags("slow"))
    .build();

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

AselectClass

BselectMethod

Cexclude

DtestAdd

Attempts:

3 left

💡 Hint

Common Mistakes

Using selectClass instead of selectMethod for a single test method.

Using includeTags instead of excludeTags.

selectMethod picks a single test method, and excludeTags filters out tests tagged "slow".