Agent testing focuses on tool coverage (does every capability get tested?), prompt behavior (do variations in input affect output?), and edge cases (what happens with unexpected inputs?).
Define test cases as scenarios: given this input, the agent should use these tools and produce this output. Automate with the testing utilities—run scenarios and assert behaviors. Coverage reports show what your code does.
Continuous testing: test prompts in isolation, test tool integrations, test integration. Prompt performance can degrade as models change—track metrics over time. A/B testing tools let you compare agent versions.