AI Agent Automated Testing 2026

Changed one line of the prompt, and all the test cases that used to pass are now failing. Agents also need automated testing—don't break existing capabilities.

💡 What You Will Learn

Changed one line of the prompt, and all the test cases that used to pass are now failing. Agents also need automated testing—don't break existing capabilities.

def test_search_tool():
    result = search_products("organic coffee")
    assert len(result) > 0
    assert "price" in result[0]

def test_full_agent_flow():
    result = agent.run("300")
    assert "product" in result
    assert result["status"] == "success"

Summary