73 lines
2.0 KiB
Python
73 lines
2.0 KiB
Python
"""
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module containing a parametrized tests testing cross-python
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serialization via the pickle module.
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"""
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import shutil
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import subprocess
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import textwrap
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import pytest
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pythonlist = ["python3.5", "python3.6", "python3.7"]
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@pytest.fixture(params=pythonlist)
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def python1(request, tmp_path):
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picklefile = tmp_path / "data.pickle"
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return Python(request.param, picklefile)
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@pytest.fixture(params=pythonlist)
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def python2(request, python1):
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return Python(request.param, python1.picklefile)
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class Python:
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def __init__(self, version, picklefile):
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self.pythonpath = shutil.which(version)
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if not self.pythonpath:
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pytest.skip(f"{version!r} not found")
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self.picklefile = picklefile
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def dumps(self, obj):
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dumpfile = self.picklefile.with_name("dump.py")
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dumpfile.write_text(
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textwrap.dedent(
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r"""
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import pickle
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f = open({!r}, 'wb')
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s = pickle.dump({!r}, f, protocol=2)
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f.close()
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""".format(
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str(self.picklefile), obj
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)
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)
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)
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subprocess.check_call((self.pythonpath, str(dumpfile)))
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def load_and_is_true(self, expression):
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loadfile = self.picklefile.with_name("load.py")
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loadfile.write_text(
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textwrap.dedent(
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r"""
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import pickle
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f = open({!r}, 'rb')
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obj = pickle.load(f)
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f.close()
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res = eval({!r})
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if not res:
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raise SystemExit(1)
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""".format(
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str(self.picklefile), expression
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)
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)
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)
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print(loadfile)
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subprocess.check_call((self.pythonpath, str(loadfile)))
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@pytest.mark.parametrize("obj", [42, {}, {1: 3}])
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def test_basic_objects(python1, python2, obj):
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python1.dumps(obj)
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python2.load_and_is_true(f"obj == {obj}")
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