Test a class function via "unittest "

[Penguin827]

import unittest
#from employee113 import Employee

class Employee():
	"""a class for show employee"""
	def __init__(self,first_name,last_name,salary):
		self.first = first_name
		self.last = last_name
		self.salary = salary 
		
	def give_rise(self,add = 5000):
		self.salary +=  add	
		return(self.salary)
		
		
class TestEmployeeSalary(unittest.TestCase):
	"""test employee salary increment"""
	def setUp(self):
	    """create a survey and a set of prarmemeters for use in all test methods"""
	    self.test_s1 = Employee("CK","Chan",40000)
	    
	def test_salary_fix_increment(self): 
		"""test fix salary default 5000 increment"""
		self.test_s1.give_rise()
		self.assertEqual(self.test_s1.give_rise(),45000 )
		
	def test_salary_floating_increment(self):
	    """test floating salary icnrement"""
	    self.test_s1.give_rise(500)
	    self.assertEqual(self.test_s1.give_rise(), 40500)	    
	

unittest.main()

Output:
FF                                                                                                                              
======================================================================                                                          
FAIL: test_salary_fix_increment (__main__.TestEmployeeSalary)                                                                   
test fix salary default 5000 increment                                                                                          
----------------------------------------------------------------------                                                          
Traceback (most recent call last):                                                                                              
  File "main.py", line 25, in test_salary_fix_increment                                                                         
    self.assertEqual(self.test_s1.give_rise(),45000 )                                                                           
AssertionError: 50000 != 45000                                                                                                  
                                                                                                                                
======================================================================                                                          
FAIL: test_salary_floating_increment (__main__.TestEmployeeSalary)                                                              
test floating salary icnrement                                                                                                  
----------------------------------------------------------------------                                                          
Traceback (most recent call last):                                                                                              
  File "main.py", line 30, in test_salary_floating_increment                                                                    
    self.assertEqual(self.test_s1.give_rise(), 40500)                                                                           
AssertionError: 45500 != 40500                                                                                                  
                                                                                                                                
----------------------------------------------------------------------                                                          
Ran 2 tests in 0.001s                                                                                                           
                                                                                                                                
FAILED (failures=2)   

i dont know why the amounts are not correct on the above test my class via import unittest
however,if i directly input the parameters in the class as below :

class Employee():
	"""a class for show employee"""
	def __init__(self,first_name,last_name,salary):
		self.first = first_name
		self.last = last_name
		self.salary = salary 
		
	def give_rise(self,add = 5000):
		self.salary +=  add	
		return(self.salary)


test_s1 = Employee("CK","Chan",40000)
print(test_s1.give_rise())  # a default value 5000 increment in salary
print(test_s1.give_rise(500)) # a floating value 500 increment in salary

Output:
45000                                                                                                                                                                              
45500 

the first question is : as i expect the result should be 45000, 40500
i cant figure it out what it is my problem in the class TestEmployeeSalary(unittest.TestCase).

the second question is : the outcome in the class TestEmployeeSalary(unittest.TestCase) are 50000,45500 (which is different from what i directly input the parameters in the class 45000 ,45500) even with the same function.

I need some help.

[Gribouillis]

The problem is that you are calling twice self.test_s1.give_rise() in the test functions. Hence you are raising the employee's salary twice.