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The first patch adds a nodetool-like capability to the cql-pytest framework. It is *not* meant to be used to test nodetool itself, but rather to give CQL tests the ability to use nodetool operations - currently only one operation - "nodetool flush". We try to use Scylla's REST API, if possible, and only fall back to using an external "nodetool" command when the REST API is not available - i.e., when testing Cassandra. The benefit of using the REST API is that we don't need to run the jmx server to test Scylla. The second patch is an example of using the new nodetool flush feature in a test that needs to flush data to reproduce a bug (which has already been fixed). Closes #8622 * github.com:scylladb/scylla: cql-pytest: reproducer for issue #8138 cql-pytest: add nodetool flush feature
Single-node funtional tests for Scylla's CQL features. Tests use the Python CQL library and the pytest frameworks. By using an actual CQL library for the tests, they can be run against any implementation of CQL - both Scylla and Cassandra. Most tests - except in rare cases - should pass on both, to ensure that Scylla is compatible with Cassandra in most features.
To run all tests against an already-running local installation of Scylla
or Cassandra on localhost, just run pytest. The "--host" and "--port"
can be used to give a different location for the running Scylla or Cassanra.
More conveniently, we have two scripts - "run" and "run-cassandra" - which do all the work necessary to start Scylla or Cassandra (respectively), and run the tests on them. The Scylla or Cassandra process is run in a temporary directory which is automatically deleted when the test ends.
Additional options can be passed to "pytest" or to "run" / "run-cassandra" to control which tests to run:
- To run all tests in a single file, do
pytest test_table.py. - To run a single specific test, do
pytest test_table.py::test_create_table_unsupported_names.
Additional useful pytest options, especially useful for debugging tests:
- -v: show the names of each individual test running instead of just dots.
- -s: show the full output of running tests (by default, pytest captures the test's output and only displays it if a test fails)