chide 4.0.0

Quickly create sample objects from data.

Quickly create and compare sample objects.

Chide’s philosophy is to give you a simple registry of parameters needed to instantiate objects for your tests. There’s also support for simplifying objects down to mappings of their attributes for easier comparison and rendering, along with parsing and rendering of formats for inserting or asserting about multiple objects that are naturally tabular.

Quickstart

Say we have two classes that each require two parameters in order to be instantiated:

from dataclasses import dataclass

@dataclass
class ClassOne:
  x: int
  y: int

@dataclass
class ClassTwo:
  a: int
  b: ClassOne

We can set up a registry of sample values as follows:

from chide import Collection, nest

samples = Collection({
    ClassOne: {'x': 1, 'y': 2},
    ClassTwo: {'a': 1, 'b': nest(ClassOne)},
})

Now we can quickly make sample objects:

>>> samples.make(ClassOne)
ClassOne(x=1, y=2)

We can provide our own overrides if we want:

>>> samples.make(ClassOne, y=3)
ClassOne(x=1, y=3)

We can also create nested trees of objects:

>>> samples.make(ClassTwo)
ClassTwo(a=1, b=ClassOne(x=1, y=2))