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sglang/test/README.md

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2025-09-04 15:56:33 +08:00
# Run Unit Tests
SGLang uses the built-in library [unittest](https://docs.python.org/3/library/unittest.html) as the testing framework.
## Test Backend Runtime
```bash
cd sglang/test/srt
# Run a single file
python3 test_srt_endpoint.py
# Run a single test
python3 -m unittest test_srt_endpoint.TestSRTEndpoint.test_simple_decode
# Run a suite with multiple files
python3 run_suite.py --suite per-commit
```
## Test Frontend Language
```bash
cd sglang/test/lang
# Run a single file
python3 test_srt_backend.py
```
## Adding or Updating Tests in CI
- Create new test files under `test/srt` or `test/lang` depending on the type of test.
- Ensure they are referenced in the respective `run_suite.py` (e.g., `test/srt/run_suite.py`) so theyre picked up in CI. For most small test cases, they can be added to the `per-commit` suite. Sort the test cases alphabetically.
- The CI will run the `per-commit` and `nightly` automatically. If you need special setup or custom test groups, you may modify the workflows in [`.github/workflows/`](https://github.com/sgl-project/sglang/tree/main/.github/workflows).
## Writing Elegant Test Cases
- Examine existing tests in [sglang/test](https://github.com/sgl-project/sglang/tree/main/test) for practical examples.
- Keep each test function focused on a single scenario or piece of functionality.
- Give tests descriptive names reflecting their purpose.
- Use robust assertions (e.g., assert, unittest methods) to validate outcomes.
- Clean up resources to avoid side effects and preserve test independence.
- Reduce the test time by using smaller models and reusing the server for multiple test cases.