def test_pipe_exception():
"How an exception in a pipe should look like"
f = pipe | str | foreach(X.upper()) | foreach(~X.lower() | int) | list
with pytest.raises(ValueError) as excinfo:
f('adfasfa')
assert excinfo.value.message == (
"invalid literal for int() with base 10: 'a'\n"
" in pipe | X.lower | X() | int\n"
" in pipe | str | foreach(X.upper | X()) | foreach(X.lower | X() | int) | list"
)
