47e827262f
Alternator's various write operations have different code paths for the different write isolation modes. Because most of the test suite runs in only a single write mode (currently - only_rmw_uses_lwt), we already introduced a test file test/alternator/test_write_isolation.py for checking the different write operations in *all* four write isolation modes. But we missed testing one write operation - BatchWriteItem. This operation isn't very "interesting" because it doesn't support *any* read-modify-option option (it doesn't support UpdateExpression, ConditionExpression or ReturnValues), but even without those, the pure write code still has different code paths with and without LWT, and should be tested. So we add the missing test here - and it passes. In issue #28439 we discovered a bug that can be seen in Alternator Streams in the case of BatchWriteItem with multiple writes to the same partition and always_use_lwt mode. The fact that the test added here passes shows that the bug is NOT in BatchWriteItem itself, which works correctly in this case - but only in the Alternator Streams layer. Fixes #28171 Signed-off-by: Nadav Har'El <nyh@scylladb.com>
Scylla in-source tests.
For details on how to run the tests, see docs/dev/testing.md
Shared C++ utils, libraries are in lib/, for Python - pylib/
alternator - Python tests which connect to a single server and use the DynamoDB API unit, boost, raft - unit tests in C++ cqlpy - Python tests which connect to a single server and use CQL topology* - tests that set up clusters and add/remove nodes cql - approval tests that use CQL and pre-recorded output rest_api - tests for Scylla REST API Port 9000 scylla-gdb - tests for scylla-gdb.py helper script nodetool - tests for C++ implementation of nodetool
If you can use an existing folder, consider adding your test to it. New folders should be used for new large categories/subsystems, or when the test environment is significantly different from some existing suite, e.g. you plan to start scylladb with different configuration, and you intend to add many tests and would like them to reuse an existing Scylla cluster (clusters can be reused for tests within the same folder).
To add a new folder, create a new directory, and then
copy & edit its suite.ini.