Which of the following statements about testing a class is correct?
A) A unit test verifies that only one method within a class works correctly.
B) A unit test verifies that a class works correctly when it is in a complete program.
C) A unit test verifies that a class works correctly in isolation, outside a complete program.
D) A unit test does not need to know what results are expected.

Question

Quizplus · Accepted Answer

A unit test is meant to verify that a class works correctly in isolation, i.e., without dependencies on other parts of the program. It should be independent of the context in which the class is used. Option A is incorrect because a unit test may test multiple methods within a class or even multiple classes. Option B is incorrect because a unit test is meant to test a single unit of functionality (class, method, or function) in isolation, not in the context of a complete program. Option D is incorrect because a unit test should know what results are expected in order to verify that the class works correctly.

Which of the Following Statements About Testing a Class Is