51d09e6a2a
In [1] a bug casting large multiprecision integers to floats is documented (note that it
received two fixes, the most recent and relevant is [2]). Even with the fix, boost now
returns NaN instead of ±∞ as it did before [3].
Since we cannot rely on boost, detect the conditions that trigger the bug and return
the expected result.
The unit test is extended to cover large negative numbers.
Boost version behavior:
- 1.78 - returns ±∞
- 1.79 - terminates
- 1.79 + fix - returns NaN
Fixes https://github.com/scylladb/scylladb/issues/18508
[1] https://github.com/boostorg/multiprecision/issues/553
[2] ea786494db
[3] https://github.com/boostorg/math/issues/1132
Closes scylladb/scylladb#18532
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++ cql-pytest - 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.