When you need to verify that your console application produces correct output and handles interactions properly, use TestConsole from Spectre.Console.Testing to capture output and simulate user input in unit tests. Structure your code to accept IAnsiConsole as a dependency instead of using the static AnsiConsole directly, enabling you to inject a test instance.
Write tests that verify expected output strings—checking that tables, messages, or styles appear correctly. For interactive prompts, queue input responses with TestConsole.Input so tests can simulate user choices. If using Spectre.Console.Cli, combine with CommandAppTester to validate both command parsing and output. This lets you catch regressions, verify edge cases, and ensure your console UI works correctly across code changes.