Copilot Chat automates code generation using test-driven development (TDD). You start by defining test cases—inputs, expected outputs, and optionally a short description of the requirements.
One loop: tests → code → validation
After you provide the tests, an LLM generates an implementation for a function or module based on your examples and notes. Copilot Chat then runs the generated code against all test cases and records which tests pass and which fail.
Iterative refinement until tests pass
If any test fails, Copilot Chat starts another iteration. It feeds the failures and mismatches back into the LLM, updates the code, and runs the tests again. This cycle repeats until every test is green.
Best for small tasks and learning
Copilot Chat is useful when you need quick, test-constrained results, such as:
- Small functions and code snippets
- Algorithm walkthroughs and practice exercises
- Learning examples and prototypes
By controlling behavior through tests, you get output that is tied to explicit, verifiable expectations.
