testing functions

[ikame]

Hi, I have this question for some time now, I have the following code in a module:

import email_lib 

def send_email(to, text, html):

    message = email_lib.Message(...)

    message.text = text

    message.html = html 

    email_lib.Connection().send(message) 

 

My question is, using PyDoubles, which is the best way to test that function? Can I mock up the entire library using PyDoubles?

Thanks in advance

[Miguel Angel]

Hi there!!

You cannot test this. But you can use some tricks :D

Every external data should be injected to be mocked, so:

import email_lib 

message = build_email(to, text, html)

send_email(email_lib.Connection(), message)

def build_email(to, text, html):

    message = email_lib.Message(...)

    message.text = text

    message.html = html 

def send_email(connection, message):

    connection.send(message) 

Now you can test every function: build_email by testing the result and send_email mocking the connection :D

You only have to accomplish with the Single Responsability Principle :D

See you!

--
Miguel Ángel García Martínez

http://www.magmax.org

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[Anler Hernandez Peral]

Hey thanks a lot, that's exactly what I wanted to know ... so, it's time to do some refactor ;)

--
anler