# Steps vs Step Extensions

A `@step` is _just_ a function that has implicit access to the `context` inside a `@script`.

A `@step_extension` is a `@step` that is added as a type extension method onto some other type.

## Understanding `@step_extension`

The intent of type extensions is to add methods to a type. We use this in `@step_extension` to enable syntax like:

@scripted_test
def some_test():
    When.http.my_thing() # this is a custom "http" step

## How to extend the `http` steps for your tests

Define a `test_steps.py` module.

from safetydance_django.steps import (
    http_client,
    http_response,
    )
from safetydance_django.test import Http
from safetydance_test.step_extension import step_extension

@step_extension(target_type=Http)
def my_thing():
    ...
    assert http_response.status_code == 200 # example, you can just use it
    ...

This should enable you to use it in your tests

@scripted_test
def test_some_thing():
    ...
    When.http.my_thing()
    ...