"""
Common utils for testing.
These functions allow testing only some frameworks, not all.
"""
import logging
import os
from functools import lru_cache
from typing import List, Tuple
from einops import _backends
import warnings
__author__ = "Alex Rogozhnikov"
# minimize noise in tests logging
logging.getLogger("tensorflow").disabled = True
logging.getLogger("matplotlib").disabled = True
FLOAT_REDUCTIONS = ("min", "max", "sum", "mean", "prod") # not includes any/all
def find_names_of_all_frameworks() -> List[str]:
backend_subclasses = []
backends = _backends.AbstractBackend.__subclasses__()
while backends:
backend = backends.pop()
backends += backend.__subclasses__()
backend_subclasses.append(backend)
return [b.framework_name for b in backend_subclasses]
ENVVAR_NAME = "EINOPS_TEST_BACKENDS"
def unparse_backends(backend_names: List[str]) -> Tuple[str, str]:
_known_backends = find_names_of_all_frameworks()
for backend_name in backend_names:
if backend_name not in _known_backends:
raise RuntimeError(f"Unknown framework: {backend_name}")
return ENVVAR_NAME, ",".join(backend_names)
@lru_cache(maxsize=1)
def parse_backends_to_test() -> List[str]:
if ENVVAR_NAME not in os.environ:
raise RuntimeError(f"Testing frameworks were not specified, env var {ENVVAR_NAME} not set")
parsed_backends = os.environ[ENVVAR_NAME].split(",")
_known_backends = find_names_of_all_frameworks()
for backend_name in parsed_backends:
if backend_name not in _known_backends:
raise RuntimeError(f"Unknown framework: {backend_name}")
return parsed_backends
def is_backend_tested(backend: str) -> bool:
"""Used to skip test if corresponding backend is not tested"""
if backend not in find_names_of_all_frameworks():
raise RuntimeError(f"Unknown framework {backend}")
return backend in parse_backends_to_test()
def collect_test_backends(symbolic=False, layers=False) -> List[_backends.AbstractBackend]:
"""
:param symbolic: symbolic or imperative frameworks?
:param layers: layers or operations?
:return: list of backends satisfying set conditions
"""
if not symbolic:
if not layers:
backend_types = [
_backends.NumpyBackend,
_backends.JaxBackend,
_backends.TorchBackend,
_backends.TensorflowBackend,
_backends.OneFlowBackend,
_backends.PaddleBackend,
_backends.CupyBackend,
]
else:
backend_types = [
_backends.TorchBackend,
_backends.OneFlowBackend,
_backends.PaddleBackend,
]
else:
if not layers:
backend_types = [
_backends.PyTensorBackend,
]
else:
backend_types = [
_backends.TFKerasBackend,
]
backend_names_to_test = parse_backends_to_test()
result = []
for backend_type in backend_types:
if backend_type.framework_name not in backend_names_to_test:
continue
try:
result.append(backend_type())
except ImportError:
# problem with backend installation fails a specific test function,
# but will be skipped in all other test cases
warnings.warn("backend could not be initialized for tests: {}".format(backend_type))
return result