What test documentation were you able to work with?

In test documentation, artifacts such as the following are usually used:

• Test plans — describe the testing strategy, objectives, resources, and timelines.
• Test cases — specific scenarios with steps, expected results, and input data.
• Test scenarios — more general descriptions of sequences of actions.
• Test reports — results of test execution, identified defects.
• Traceability matrices — link requirements to tests.

For example, in a project, I wrote test cases for functional testing of a web application, describing steps and expected results to verify forms and buttons.