What is the expected output of the unittest when running tests?

When running unit tests with a testing framework like unittest, the expected output typically includes a summary of the test results, which provides insight into how many tests were run, how many passed, and if any failed. Specifically, this summary will indicate the total number of tests executed, as well as the results of each test, often highlighting failures or errors if they occurred.

The purpose of this summary is to give developers an overview of the test execution without inundating them with too much detail, unless they request it. It’s particularly useful for developers to quickly ascertain the health of the codebase and to identify any areas that need attention.

This focus on a summary distinguishes it from other options that don’t encompass the full context of output provided by unittest. For example, while a statement about tests passed might be part of the summary, the summary itself is a more comprehensive output. Similarly, simply stating "All tests completed" doesn’t encapsulate the specifics of test results, and saying "Test failed" is only relevant if a failure occurs. Thus, the test summary provides a complete overview of the testing process and outcomes.