I have some function:
def reverse_number(num):
try:
return int(num)
except ValueError:
return "Please provide number"
and test for this:
assert_raises(ValueError, reverse.reverse_number, "error")
But when I call nosetests I got this error:
AssertionError: ValueError not raised
What am I doing wrong?
The function reverse_number catches the exception, preveting the exception to be raised; cause the assertion failure because assert_raises call expects the function call raises the ValueError exception.
Simply not catching the exception, you can get what you want:
def reverse_number(num):
return int(num)
Or, you can catch the exception, do something, and re-raise the exception using raise statement:
def reverse_number(num):
try:
return int(num)
except ValueError:
# do something
raise # <--- re-raise the exception
