Developers CRT-450 Salesforce Study Notes

• The @testSetup annotation is a way to create test data for a test class. It allows you to define a method that runs once before any test methods in the class and inserts common test data into the test context12.
• The @testSetup annotation is not supported when the GisTest(SeeAllData=True) annotation is used. The GisTest(SeeAllData=True) annotation allows a test class or method to access all data in the organization, including pre-existing data that the test didn’t create. If this annotation is used, the test setup method is skipped and no test data is inserted12.
• Test data is inserted once for all test methods in a class when the @testSetup annotation is used. This means that the test data is shared across all test methods and only counts once towards the governor limits. This can improve the performance and efficiency of the test class12.
• A method defined with the @testSetup annotation does not execute once for each test method in the test class and does not count towards system limits. It only executes once before any test methods and only counts once towards the governor limits. However, any DML operations or queries performed in the individual test methods do count towards the system limits12.

References:

• 1: Using Test Setup Methods
• 2: Cert Prep: Platform Developer I: Testing and Debugging

A developer can execute tests in an org using different methods, depending on the context and the tools available. The Tooling API1 allows developers to run tests programmatically by making REST or SOAP calls. The Setup Menu2 provides a user interface for running tests in the Salesforce org. Salesforce DX3 is a command-line tool that enables developers to create, test, and deploy applications using scratch orgs, which are temporary and customizable orgs for development and testing purposes. References: 1: Tooling API | Apex Developer Guide | Salesforce 2: Run Unit Tests | Apex Developer Guide | Salesforce 3: Salesforce DX | Salesforce

The test method fails in the sandbox test framework because it relies on existing data in the sandbox, which may not be consistent or available for the test execution. The Apex test framework uses a separate test data context that is rolled back after the test execution, so any data that is queried or inserted by the test method must be created within the test method or by using the @testSetup annotation. The Execute Anonymous window, on the other hand, runs the Apex logic in the current user context and can access the existing data in the sandbox. Therefore, the Apex logic may succeed in the Execute Anonymous window but fail in the test framework. References:

• Apex Testing (Salesforce Developer Documentation)
• Isolation of Test Data from Organization Data in Unit Tests (Salesforce Developer Documentation)
• Free Salesforce Platform Developer 1 Practice Exam (With Answers) (Salesforce Ben)

To create a class that provides the capabilities defined by multiple interfaces, the class must use the implements keyword followed by a comma-separated list of the interface names. The class must also provide the implementation for all the methods declared in the interfaces. The extends keyword is used for inheritance, not for implementing interfaces. Therefore, option C is the correct implementation of the DrawList class that implements both the Sortable and Drawable interfaces. References: Interfaces | Apex Developer Guide, Cert Prep: Platform Developer I: Developer Fundamentals