Custom conditions with @EnabledIf in JUnit - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the @EnabledIf annotation in JUnit?

The @EnabledIf annotation allows tests to run only when a custom condition is true. It helps control test execution based on dynamic logic.

beginner

How do you write a simple custom condition method for @EnabledIf?

Create a static method that returns a boolean. The method contains the logic to decide if the test should run. Example: <br>

public static boolean isTestEnabled() { return true; }

intermediate

What must be true about the method used in @EnabledIf's expression?

The method must be static, return a boolean, and be accessible from the test class or a referenced class.

intermediate

How does @EnabledIf improve test suite efficiency?

It skips tests that don't meet certain conditions, saving time and resources by not running irrelevant tests.

beginner

Give an example of using @EnabledIf with a custom condition method.

Example:<br>

@EnabledIf(expression = "com.example.MyConditions.isFeatureEnabled()", reason = "Feature must be enabled")
void testFeature() { /* test code */ }

What type of method can be used with @EnabledIf to control test execution?

A Any method returning String

B A non-static method returning void

C A static method returning boolean

D A static method returning int

The method must be static and return a boolean to be used with @EnabledIf.

What happens if the @EnabledIf condition returns false?

A The test is skipped

B The test fails

C The test runs anyway

D The test throws an exception

If the condition is false, JUnit skips the test.

Where can the method used in @EnabledIf be located?

A In the test class or any accessible class

B Only in the test class

C Only in a superclass

D Only in a private inner class

The method can be in the test class or any class accessible to the test.

Which of these is a valid reason to use @EnabledIf?

A Automatically fix test errors

B Force all tests to run

C Ignore test failures

D Run tests only if a feature flag is enabled

@EnabledIf is used to conditionally run tests, such as when a feature flag is enabled.

What is the return type required for a method used in @EnabledIf expression?

A void

B boolean

C int

D String

The method must return a boolean to indicate if the test should run.

Explain how to create and use a custom condition with @EnabledIf in JUnit.

Think about a method that returns true or false and how you tell JUnit to use it.

Describe benefits of using @EnabledIf for conditional test execution.

Consider why you might want to run some tests only sometimes.