def test_manager_modifies_nothing_when_no_pymodules(tmpdir):
"""Check that nothing happens when no pymodules present on the path."""
sys_path_length = len(sys.path)
with local_modules(str(tmpdir)) as pymodules_path:
assert pymodules_path is None
assert len(sys.path) == sys_path_length
def test_manager_sets_sys_path_when_pymodules(tmpdir):
"""Check if the correct path is yielded when pymodules are present."""
pymodules = tmpdir.mkdir('.pymodules')
sys_path_length = len(sys.path)
with local_modules(str(tmpdir)):
assert str(pymodules) == sys.path[1]
assert len(sys.path) == (sys_path_length + 1)
assert len(sys.path) == sys_path_length
def test_manager_returns_path_when_pymodules(tmpdir):
"""Check if the correct path is yielded when pymodules are present."""
pymodules = tmpdir.mkdir('.pymodules')
with local_modules(str(tmpdir)) as pymodules_path:
assert pymodules_path == str(tmpdir)
