Testing and Debugging Flashcards

Which System.assert method should you use when you want to verify that two values are equal and display a custom failure message?

Answer: System.assertEquals()

System.assertEquals(expected, actual, message) verifies equality and accepts an optional third parameter for a custom failure message.

What is the effect of calling Test.startTest() in an Apex test method?

Answer: It opens a new governor limit context for the code under test

Test.startTest() creates a fresh set of governor limits so the code between startTest/stopTest runs with its own independent limits.

A developer needs to test a trigger that sends an outbound HTTP callout. Which class must be implemented to avoid a 'You have uncommitted work pending' error in the test?

Answer: HttpCalloutMock

Implementing HttpCalloutMock and registering it with Test.setMock() allows Apex tests to simulate HTTP responses without making real callouts.

In the Apex debugger, what does the SOQL_EXECUTE_BEGIN log line indicate?

Answer: A SOQL query is about to be executed

SOQL_EXECUTE_BEGIN marks the start of a SOQL query execution in the debug log, while SOQL_EXECUTE_END marks its completion.

Which debug log level produces the MOST detailed output and is therefore most useful for tracing complex logic, but also consumes the most storage?

Answer: FINEST

FINEST is the most verbose log level in Salesforce, capturing granular detail about code execution at the cost of larger log size.

What happens if a test method contains a DML statement outside of Test.startTest()/Test.stopTest() and the DML count has already reached the limit?

Answer: A LimitException is thrown, failing the test

Exceeding any governor limit, including DML statements, causes a LimitException that halts and fails the test method.

A developer sets up test data using @testSetup. Which of the following statements about @testSetup data is TRUE?

Answer: Each test method gets its own rollback of the setup data after it runs

@testSetup data is inserted once per class and each test method operates on a clean copy via automatic rollback after each method completes.