@EnabledOnOs for OS-specific tests in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable the test only on Windows OS.

JUnit

@EnabledOnOs([1])
void testWindowsFeature() {
    // test code here
}

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

AOS.WINDOWS

BOS.LINUX

COS.MAC

DOS.UNIX

Attempts:

3 left

💡 Hint

Common Mistakes

Using OS.LINUX or OS.MAC instead of OS.WINDOWS

Forgetting to use curly braces {} around the OS constant

The @EnabledOnOs annotation requires the OS constant to specify which OS the test should run on. For Windows, use OS.WINDOWS.

2fill in blank

medium

Complete the code to enable the test on both Linux and Mac OS.

JUnit

@EnabledOnOs([1])
void testUnixFeatures() {
    // test code here
}

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

AOS.LINUX

BOS.LINUX, OS.MAC

COS.MAC

DOS.WINDOWS

Attempts:

3 left

💡 Hint

Common Mistakes

Listing OS constants without braces

Using only one OS constant when multiple are needed

To enable the test on multiple OS, list them inside the annotation separated by commas within the braces.

3fill in blank

hard

Fix the error in the annotation to correctly enable the test on Mac OS.

JUnit

@EnabledOnOs([1])
void testMacFeature() {
    // test code here
}

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

AOS.MAC

BOS.mac

CMac.OS

DOS.Mac

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect casing like OS.mac or OS.Mac

Swapping the order like Mac.OS

The OS constants are case-sensitive and must be exactly OS.MAC to work correctly.

4fill in blank

hard

Fill both blanks to enable the test on Linux and Windows OS.

JUnit

@EnabledOnOs([1], [2] })
void testCrossPlatform() {
    // test code here
}

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

AOS.LINUX

BOS.WINDOWS

COS.MAC

DOS.UNIX

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of braces

Forgetting the comma between OS constants

To enable on multiple OS, list them inside the annotation separated by commas within braces. Here, Linux and Windows are OS.LINUX and OS.WINDOWS.

5fill in blank

hard

Fill all three blanks to enable the test on Windows, Mac, and Linux OS.

JUnit

@EnabledOnOs([1], [2], [3] })
void testAllPlatforms() {
    // test code here
}

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

AOS.WINDOWS

BOS.MAC

COS.LINUX

DOS.UNIX

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of braces

Missing commas between OS constants

Incorrect casing of OS constants

The annotation lists all OS constants inside braces separated by commas. For Windows, Mac, and Linux, use OS.WINDOWS, OS.MAC, and OS.LINUX.