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When a piece of software is moved from the prototype stage to the hardening and development stage, developers use a "continuous checking framework" to make sure that on every git-push all unit tests are run. If unit tests fail, the framework alerts the responsible parties with emails or other status messages.
For this course, we will not use a continuous testing framework.
Instead, we will maintain a script for our project that can run all unit tests.
- Write it as a shell script or as a short program in your favorite language. Name it xtest and place it in your project-level directory (Train/). 
- Document how to run the script in your — - Read Me. 
- Run the script every time before you git-push. 
- It is acceptable for unit test cases to fail. Hence the basic output of the script is just a line or two of how many test cases it ran, how many passed, how many failed. - Developers often add failing test cases when they have to interrupt work. It is a standard technique that reminds them where to resume the project. 
- It is not acceptable for unit testing to break the script (e.g., raise an uncaught exception). If unit testing fails, your script must show enough output for you to fix the problems.