When you have completed an assignment, you can return to the submissions page and ask to see the solution. You will see not only my solution to the assignment but also the tests that I used for the evaluation. These tests are sometimes simple input files. Other times they are shell scripts that can be executed to run the test.

Even if (maybe especially if) you do poorly on an assignment, you can still learn from it by reviewing the solution. I assume that everyone does so. I'm happy to answer questions about assignment solutions, but if you do not ask, I will assume that you read the solution and understood it.