Custom conditions with @EnabledIf in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable the test only if the system property 'env' equals 'test'.

JUnit

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.condition.EnabledIf;

public class EnvTest {
    @Test
    @EnabledIf(expression = "${env} == '[1]'", reason = "Only runs in test environment")
    void runOnlyInTestEnv() {
        System.out.println("Test running in test environment");
    }
}

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

Atest

Bprod

Cdev

Dstage

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong environment string like 'prod' or 'dev' which disables the test.

Forgetting to put the string in quotes inside the expression.

The test should run only when the 'env' system property equals 'test', so the expression must check for 'test'.

2fill in blank

medium

Complete the code to enable the test only if the Java version is 17.

JUnit

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.condition.EnabledIf;

public class JavaVersionTest {
    @Test
    @EnabledIf(expression = "${java.version} == '[1]'", reason = "Run only on Java 17")
    void runOnlyOnJava17() {
        System.out.println("Running on Java 17");
    }
}

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A11

B8

C17

D19

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different Java version number like '11' or '8'.

Not quoting the version string properly in the expression.

The test should run only if the Java version is exactly '17', so the expression must check for '17'.

3fill in blank

hard

Fix the error in the expression to enable the test only if the OS name contains 'Windows'.

JUnit

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.condition.EnabledIf;

public class OsTest {
    @Test
    @EnabledIf(expression = "[1].contains('Windows')", reason = "Run only on Windows OS")
    void runOnlyOnWindows() {
        System.out.println("Running on Windows OS");
    }
}

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ASystem.os.name

Bos.name

C"os.name"

DSystem.getProperty("os.name")

Attempts:

3 left

💡 Hint

Common Mistakes

Using just 'os.name' which is not a valid variable.

Using a string literal '"os.name"' which is not the OS name value.

The expression must call System.getProperty("os.name") to get the OS name string before calling contains().

4fill in blank

hard

Fill both blanks to enable the test only if the environment is 'prod' and the Java version is at least 11.

JUnit

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.condition.EnabledIf;

public class ProdJavaTest {
    @Test
    @EnabledIf(expression = "${env} == '[1]' && Integer.parseInt(${java.version}) [2] 11", reason = "Run only in prod with Java 11 or higher")
    void runInProdJava11Plus() {
        System.out.println("Running in prod with Java 11+");
    }
}

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Aprod

B>=

C<=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<=' instead of '>=' for Java version comparison.

Using wrong environment string like 'test' or 'dev'.

The environment must be 'prod' and the Java version must be greater than or equal to 11 to enable the test.

5fill in blank

hard

Fill all three blanks to enable the test only if the OS is Linux, the environment is 'dev', and the Java version is exactly 17.

JUnit

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.condition.EnabledIf;

public class ComplexConditionTest {
    @Test
    @EnabledIf(expression = "System.getProperty('os.name').toLowerCase().contains('[1]') && ${env} == '[2]' && ${java.version} == '[3]'", reason = "Run only on Linux dev environment with Java 17")
    void runOnLinuxDevJava17() {
        System.out.println("Running on Linux dev with Java 17");
    }
}

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Alinux

Bdev

C17

Dwindows

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'windows' instead of 'linux' for OS check.

Using wrong environment like 'prod' instead of 'dev'.

Using wrong Java version like '11' instead of '17'.

The OS name must contain 'linux', environment must be 'dev', and Java version must be '17' to enable the test.