What's a good test?

A good test should be several things:

• Clear and concise: It should be easy to understand what the test is trying to achieve.
• Atomic: It should test one specific piece of functionality or behavior.
• Independent: The outcome of the test shouldn't rely on other tests passing or failing.
• Repeatable: It should produce the same results consistently when run multiple times.
• Measurable: It should have a clear pass/fail criteria based on a desired outcome.
• Relevant: It should test something valuable to the overall quality of the software.