Describe the Best Practices for Unit Testing in Apex. PLATFORM-DEVELOPER-II Practice Questions (Page 4)

Questions 16–20

1. 16application · easy

   A developer is writing a test for a method that returns a list of Account names. The method should return an empty list when no Accounts exist. Which assertion should the developer use to verify this behavior?

   • ASystem.assertEquals(null, accountNames);
   • BSystem.assertNotEquals(null, accountNames);
   • CSystem.assert(accountNames.isEmpty());
   • DSystem.assertEquals(0, accountNames.size());
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   A developer is testing a method that returns a list of Account names sorted alphabetically. The test creates three Accounts with names 'Beta', 'Alpha', and 'Gamma'. Which assertion verifies the correct sorting?

   • ASystem.assertNotEquals(new List<String>{'Beta', 'Alpha', 'Gamma'}, accountNames);
   • BSystem.assertEquals(3, accountNames.size());
   • CSystem.assertEquals(new List<String>{'Alpha', 'Beta', 'Gamma'}, accountNames);
   • DSystem.assert(accountNames.contains('Alpha'));
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A developer is writing a test for a class that calculates the total value of all Opportunities for an Account. The test creates an Account and two Opportunities. The developer wants to ensure the test is isolated and does not depend on other data in the org. What is the best practice for creating the test data?

   • AUse @testSetup to create the Account and Opportunities once for all test methods.
   • BQuery existing Accounts and Opportunities from the org.
   • CUse System.runAs() to create the data as a different user.
   • DCreate the data in each test method using Test.startTest() and Test.stopTest().
   Reveal Solution Discussion Select an answer first
5. 19expert · medium

   A developer is testing a batch class that processes Accounts and makes a callout for each one. The batch is designed to process up to 100 Accounts per batch. The developer wants to verify that the batch does not exceed the callout limit. Which test approach is correct?

   • AUse Test.setMock() for the callout and assert that the callout count is within the limit after Test.stopTest().
   • BUse System.runAs() to run the batch as a user with more callout limits.
   • CUse System.assert(Limits.getCallouts() == 100) after the batch completes.
   • DUse Test.startTest() and Test.stopTest() without mocking the callout.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   What is the correct way to define a class that contains only Apex unit test methods?

   • AUse the 'static' keyword on the class definition.
   • BUse the @isTest annotation on the class definition.
   • CUse the 'test' keyword in the class name.
   • DUse the 'private' access modifier on the class.
   Reveal Solution Discussion Select an answer first