Python Unit Test Automation

Listing 3-13.  mymathsimple.py
def add(x, y):
    return(x + y)
def mul(x, y):
    return(x * y)
def sub(x, y):
    return(x - y)
def div(x, y):
    return(x / y)
These modules you just created are the development modules. Finally, to create a 
package of the development modules, create the __init__.py file with the code shown in 
Listing 
3-14
.
Listing 3-14.  __init__.py
all = ["mymathlib", "mymathsimple"]
This will create a Python package for the development code. Now, navigate back to 
the chapter03 directory. The structure of the chapter03 directory should now look like 
Figure 
3-2
.

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Chapter 3 
■
 Unittest
51
mypackage is the package of the development code and test is the package of the 
testing code.
You now need to create a test module for testing the development code in mypackage. 
Create a new test module called test_module09.py in the test directory and add the 
code shown in Listing 
3-15
.