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SQLAlchemy Spanner dialect includes a test suite, which can be executed both on a live service and Spanner emulator.
Using pytest
To execute the test suite with standard pytest package you only need to checkout to the package folder and run:
pytest -v
Using nox
The package includes a configuration file for nox package, which allows to execute the dialect test suite in an isolated virtual environment. To execute all the nox sessions checkout to the dialect folder and then run command:
nox
To execute only the dialect compliance test suite execute command:
nox -s compliance_test
Live service
To run the test suite on a live service use setup.cfg db.default attribute to set URI of the project, instance and database, where the tests should be executed.
Emulator
As the dialect is built on top of the Spanner DB API, it also supports running on Spanner emulator. To make it happen you need to set an environment variable, pointing to the emulator service, for example SPANNER_EMULATOR_HOST=localhost:9010