CODEWITHSUNDEEP
pythonunit-testing
Zazz
Zazz

Reputation: 381

How do i write a mock configuration file in the setUp for my unittesting?

I am trying to make my setUp-method create a mock configuration file, write a bunch of mock variables to it, and then use this file to instantiate the class (called Producer) i am running my tests on. 

path_to_file =("/path/to/unit.Config")
unitTest = open (path_to_file, 'w')
unitTest.write("a string containing mock variables")
prod = Producer("unit.Config")

The tests work if i manually create a file and fill it with data prior to running the tests, but doing it in setUp causes my program to crash ("Producer instance has no attribute 'LOGGER'). If i remove the 3 first lines of code the tests will run fine - so writing to the config file works.

Upvotes: 0

Views: 1052

Answers (2)

l0b0
l0b0

Reputation: 58788

To guarantee that the content that you write to a file is actually available to any process reading the file you need to close the file handle after writing to it. The easiest way to remember to do this is to use a context manager:

with open(path_to_file, 'w') as file_pointer:
    file_pointer.write("content")
# Outside the `with` the file content is available

Upvotes: 1

holdenweb
holdenweb

Reputation: 37023

Perhaps if you closed the file before trying to read the configuration from it you might get better results.

Upvotes: 0

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