Test class in Python

My current level of competence is insufficient to cover the unit test of the case when my function goes in three if case and one else. I need to see if the logic that it executes comes from the specified if-case. I do understand the usage of assert, I just want to see how to implement the test.

import a,b,c,d
import ForeignClass
from ForeignClass import catchSomeCriminal


if condition1 and parameter1 == "foo" and parameter2 =="bar":
    stringValue= "gothamCity"
    fucntionFooBar(_, _)

elif condition1 and parameter1 == "batman" and parameter2 == "robin":
    stringValue= functionBatmanRobin(_, _)

elif parameter3 = "twoFace":
    stringValue= "gothamCity"

else:
    stringValue= ForeignClass({"car": "batmobile", "punch": "pow-pow", "kick": "bang-bang"})
    stringValue.catchSomeCriminal()

return stringValue

functionFooBar(_,_):
    pass

functionBatmanRobin(_,_):
    pass

...

I was hoping to create test with something like stringValue.assert_called_with(,). Can you help Batman deal with this problem in Gotham City?