1、12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758591. Revisit the CRC model and the object-relationship model.2. Inspect the description of each CRC index card to determine if a delegated responsibility is part of the collaborators definition

2、.3. Invert the connection to ensure that each collaborator that is asked for service is receiving requests from a reasonable source.60required to demonstrate one collaboration61Berard BER93 proposes the following approach:1. Each test case should be uniquely identified and should be explicitly assoc

3、iated with the class to be tested,2. The purpose of the test should be stated,3. A list of testing steps should be developed for each test and should contain BER94:a. a list of specified states for the object that is to be testedb. a list of messages and operations that will be exercised as a conseq

4、uence of the testc. a list of exceptions that may occur as the object is testedd. a list of external conditions (i.e., changes in the environment external to the software that must exist in order to properly conduct the test)e. supplementary information that will aid in understanding or implementing the test.62636465666768697071727374757677787980818283848586878889909192939495969798991001011021