Salesforce Platform Developer Practice Exam

What does a test method in Apex use to assert conditions?

1. Test.run()

2. ApexAssert()

3. System.assert()

4. AssertTrue()

The correct answer is: System.assert()

In Apex, a test method uses `System.assert()` to assert conditions during the execution of unit tests. This method is part of the System class and allows developers to verify that specific conditions are true during the test. It can be used to compare expected values with actual outcomes, facilitating the identification of failures in code logic. When a condition is not met, the assertions help highlight issues in the implementation, thereby ensuring code quality and reliability. Using `System.assert()` is important because it provides clear feedback on the behavior of the code being tested. If the assertion fails, it throws an exception and indicates the test has not passed, allowing developers to identify and rectify issues in their code effectively. This approach is integral to the development of resilient applications in the Salesforce environment, ensuring that the functionality aligns with the requirements. Other options mentioned, such as `Test.run()`, `ApexAssert()`, and `AssertTrue()`, are not valid methods in Apex for asserting conditions in test methods. The absence of these methods in the Apex framework confirms that `System.assert()` is the correct and standard way to perform assertions in unit tests.