Use factory-boy and pytest-factoryboy to make object factories and fixtures

[grahamalama]

Factoryboy is a slight improvement over our DIY factory setup because it makes it easier to set "deep" attributes of objects.

Before

@pytest.fixture
def context_comment_example(
    webhook_user_factory,
    bug_factory,
    webhook_event_factory,
    action_context_factory,
    jira_context_factory,
) -> ActionContext:
    user = webhook_user_factory(login="[email protected]")
    comment = BugzillaWebhookComment.parse_obj({"number": 2, "body": "hello"})
    bug = bug_factory(
        see_also=["https://mozilla.atlassian.net/browse/JBI-234"],
        comment=comment,
    )
    event = webhook_event_factory(target="comment", user=user)
    context = action_context_factory(
        operation=Operation.COMMENT,
        bug=bug,
        event=event,
        jira=jira_context_factory(issue=bug.extract_from_see_also()),
    )
    return context

After

@pytest.fixture
def context_comment_example(action_context_factory) -> ActionContext:
    return action_context_factory(
        operation=Operation.COMMENT,
        bug__see_also=["https://mozilla.atlassian.net/browse/JBI-234"],
        bug__with_comment=True,
        bug__comment__number=2,
        bug__comment__body="hello",
        event__target="comment",
        event__user__login="[email protected]",
        jira__issue="JBI-234",
    )

My hope is that this more ergonomic API will encourage using factories directly more often, rather than creating many one-off fixtures with slightly different attributes.

[leplatrem]

Neat 💯