File: test_demos.py

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import os
import sys
import pytest

demo_dir = os.path.dirname(os.path.realpath(__file__))

ufl_files = []
for file in os.listdir(demo_dir):
    if file.endswith(".py") and not file == "test_demos.py":
        ufl_files.append(file[:-3])


@pytest.mark.parametrize("file", ufl_files)
def test_demo(file):
    if file in [
        "MixedGradient", "TraceElement",  # HDiv Trace
        "MixedElasticity",  # VectorElement of BDM
        "RestrictedElement",
        "_TensorProductElement"
    ]:
        # Skip demos that use elements not yet implemented in Basix
        pytest.skip()

    extra_flags = "-Wunused-variable -Werror -fPIC "
    assert os.system(f"cd {demo_dir} && ffcx {file}.py") == 0
    assert os.system(f"cd {demo_dir} && "
                     "CPATH=../ffcx/codegeneration/ "
                     f"gcc -I/usr/include/python{sys.version_info.major}.{sys.version_info.minor} {extra_flags}"
                     f"-shared {file}.c -o {file}.so") == 0