Tests

pixi run test     # tests/test_tandem.py

Suite

• Every vector of the specification, from tests/vectors.json.
• Stream dumps in tests/data from several offsets.
• randint, randn, exponential and multinomial against tests/cross.json, made by tools/cross_json.py from the tandem-c fixtures. tools/bump.sh moves the pins to the latest main.
• With a CUDA device, CUDA fills against CPU fills for every dtype.

tests/test_tandem.py checks every vector of the specification (tests/vectors.json, a copy of the spec repository's file) and compares fills from several offsets with the reference stream dumps in tests/data, complex types included. It checks randint, randn and exponential against tests/cross.json, which tools/cross_json.py makes from the cross-check headers of tandem-c and which holds the values of tandem-c and tandem-cuda, randperm against a Python Fisher-Yates over the stream words, bfloat16 against the 16-bit word fill and at against fills. With a CUDA device the suite also runs the cross-checks there and compares CUDA fills with CPU fills for every dtype, four chunk lengths, fourteen positions and nine lengths, and on storage that is not 16-byte aligned.

Fixtures

tools/bump.sh moves the pins to the latest main.

CI

CI runs the CPU tests on Linux and macOS and fails when the vectors drift from upstream or a submodule pin is not on its upstream main. The CUDA tests run by hand on a GPU host.