I am new to Python, and am trying behave for the first time. If it matters, I am using VSCode as my editor, and run behave from the VSCode terminal.
My project is setup like this:
payz
features
tuples.feature
steps
toople.py
toople.py
toople.py contains:
from dataclasses import dataclass
@dataclass
class Toople:
x: float = 0
y: float = 0
z: float = 0
w: float = 0
def is_point(self) -> bool:
return self.w == 1.0
def is_vector(self) -> bool:
return self.w == 0.0
The feature contains:
Feature: Tuples, Vectors, and Points
Scenario: A tuple with w=1.0 is a point
Given a ← tuple(4.3, -4.2, 3.1, 1.0)
Then a.x = 4.3
And a.y = -4.2
And a.z = 3.1
And a.w = 1.0
And a is a point
And a is not a vector
The feature steps has this defined:
from behave import *
from toople import *
@given('a ← tuple(4.3, -4.2, 3.1, 1.0)')
def step_impl(context):
context.a = Toople(x=4.3, y=-4.2, z=3.1, w=1.0)
running behave from the CLI fails with this error:
context.a = Toople(x=4.3, y=-4.2, z=3.1, w=1.0)
^^^^^^
NameError: name 'Toople' is not defined
from the python shell, it works fine:
~/src/payz | on main !2 ?2 python 1 err | at 07:39:15 PM
Python 3.11.0 (main, Oct 25 2022, 18:01:25) [GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from toople import *
>>> a = Toople(x=4.3,y=2.2,z=3.3,w=1.0)
>>> print(a)
Toople(x=4.3, y=2.2, z=3.3, w=1.0)
>>> print(a.is_point())
True
>>> print(a.is_vector())
False
>>>
Toople is on purpose to avoid any clases with the builtin Tuple.
I have PYTHONDONTWRITEBYTECODE=1 in my environment, in an attempt to rule out any caching (__pycache__) issues.
I have changed the class file and saved it in between trying behave, and don't see any behavior change.
I had these tests at least partially passing, and then decided to try to rename the class to Tuple. That failed, so I tried undoing that change, which is when I started experiencing this failure. I have seen the Given pass before, so, I'm not seeing what I broke.
How do I debug this? ...and/or...fix this so the feature passes?
The problem is that you are naming two different files with the same name, and that produces this error.
Try to rename the dataclass file to toople_dataclass.py and in your steps file write this:
from behave import *
from toople_dataclass import Toople
@given('a ← tuple(4.3, -4.2, 3.1, 1.0)')
def step_impl(context):
context.a = Toople(x=4.3, y=-4.2, z=3.1, w=1.0)
That way works for me.