easier_flask_view_testing.py

# Idea shamelessly stolen from pyramid.

# utils.py
from collections import Mapping
from functools import wraps                               
                                                          
from flask import has_request_context, render_template    
                                                          
                                                          
def render_dict_template(template):
    def decorator(func):
        @wraps(func)
        def _decorator(*args, **kwargs):
            result = func(*args, **kwargs)
            # Allow for other return values such as redirect.
            if isinstance(result, Mapping) and has_request_context():
                return render_template(template, **result)
            return result
        return _decorator                                 
    return decorator                                      


# views.py
from subshop import shop, storage, utils


@shop.route('/')
@shop.route('/plans')
@utils.render_dict_template('plan_list.html')
def plan_list():                             
    return {'plans': storage.get_plans()}    


# In terminal
>>> from subshop import views
>>> assert views.plan_list() == {'plans': [...]}