Explanation:
class_setup( )
setup( )
teardown( )
class_teardown( )
ABAP Unit Test framework defines a fixed sequence for test fixture methods to ensure reliable test execution and cleanup:
* class_setup( ):Called once before any tests in the test class are run. Used to prepare global test data or setup that applies to all tests.
* setup( ):Called before each individual test method to prepare local test data or preconditions.
* teardown( ):Called after each individual test method to clean up what was done in setup( ).
* class_teardown( ):Called once after all tests have been executed to clean up class-level resources.
This sequence supports isolation and repeatability of test executions, ensuring that one test's result does not influence another's.
Reference: ABAP Unit Test Framework Documentation, ABAP Cloud Programming Model Guidelines - Test Class Lifecycle Management.
