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add sync and async test guide at contributing.md #2694

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Jul 11, 2024
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3 changes: 3 additions & 0 deletions CONTRIBUTING.md
Original file line number Diff line number Diff line change
Expand Up @@ -269,6 +269,9 @@ Below is a checklist of things to be mindful of when implementing a new instrume
- ex. <https://github.com/open-telemetry/opentelemetry-python-contrib/blob/2518a4ac07cb62ad6587dd8f6cbb5f8663a7e179/instrumentation/opentelemetry-instrumentation-requests/src/opentelemetry/instrumentation/requests/__init__.py#L234>
- Appropriate error handling
- ex. <https://github.com/open-telemetry/opentelemetry-python-contrib/blob/2518a4ac07cb62ad6587dd8f6cbb5f8663a7e179/instrumentation/opentelemetry-instrumentation-requests/src/opentelemetry/instrumentation/requests/__init__.py#L220>
- Isolate sync and async test
- For synchronous tests, the typical test case class is inherited from `opentelemetry.test.test_base.TestBase`. However, if you want to write asynchronous tests, the test case class should inherit also from `IsolatedAsyncioTestCase`. Adding asynchronous tests to a common test class can lead to tests passing without actually running, which can be misleading.
- ex. <https://github.com/open-telemetry/opentelemetry-python-contrib/blob/60fb936b7e5371b3e5587074906c49fb873cbd76/instrumentation/opentelemetry-instrumentation-grpc/tests/test_aio_server_interceptor.py#L84>

## Expectations from contributors

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