Testionary

A library providing tools to inspect dicionaries during testing.

Installation

Using pip:

pip install testionary

or using uv for project management:

uv add testionary

Usage

Read and Modified attributes

Accessing a value using e.g. the []-operator or dict.get() method will cause the key to be added to TrackingDict.accessed_keys. Setting a value e.g. using assignment together with the []-operator will get tracked using TrackingDict.modified_keys. Here is a small example:

# My library code:
>>> def set_danger(enemy):
...     if enemy["type"] == "Rabbit":
...         enemy["danger"] = 9000


# My test:
>>> from testionary.tracking_dict import TrackingDict
>>> tracked_dict = TrackingDict({"type": "Rabbit", "danger": 42})
>>> set_danger(tracked_dict)
>>> "type" in tracked_dict.accessed_keys
True
>>> "danger" in tracked_dict.modified_keys
True

Tracked Access methods

• []
• .get

Tracked Modification methods

• [] =
• .update()
• |=

Iteration

When iterating over dictionary, e.g. when using dictionary comprehension, you might be accessing a few or all of the items. However, in these scenarios it is common to actually interate over all the key-value pairs while filtering on some condition. Instead of attemting to track each access with TrackingDict.accessed_keys, a boolean attribute, TrackingDict.has_been_iterated, is used instead. Here is an example of this being used:

# Libray code
>>> def vals_as_str(_dict):
...    return {k: str(v) for k,v in _dict.items()}

# My test:
>>> from testionary.tracking_dict import TrackingDict

>>> tracked_dict = TrackingDict({"type": "Rabbit", "danger": 42, "hp": 100, "armor": 100})
>>> vals_as_str(tracked_dict)
{'type': 'Rabbit', 'danger': '42', 'hp': '100', 'armor': '100'}
>>> tracked_dict.has_been_iterated
True

Tracked Iteration Methods

• __iter__() called by iter() and for
• __contains__(), called by in operator in e.g. if "key" in my_dict
• .keys()
• .values()
• .items()

For .keys(), .values(), and .items(), iteration is assumed following calls to these methods. The returned dict-views are not inspected.