My current get_input() function:
======================================================
def get_input():
'''Get string input from the user and convert it to an integer. This
integer is returned to the caller.
:num_sides: Number of sides for the displayed grid.'''
while True:
try:
num_sides = int(input("Number of sides = "))
return num_sides
except ValueError:
print("'Number of sides' must be a positive integer. Please enter "
"an integer.")
=======================================================
My current TestGetInput class:
=======================================================
class TestGetInput(unittest.TestCase):
'''Tests for the function get_input().'''
def setUp(self):
'''Establish conditions for running these tests.'''
# Redirect sys.stdin in order to test input functions.
self.old_stdin = sys.stdin
sys.stdin = StringIO('5')
def test_get_input(self):
'''Test that get_input() returns the expected result.'''
expected = 5
self.assertEqual(draw2x2grid.get_input(), expected)
def test_get_input_value_error(self):
'''Test that get_input() raises a ValueError if improper input
entered.'''
sys.stdin = StringIO('a')
with self.assertRaises(ValueError):
draw2x2grid.get_input()
def tearDown(self):
'''Clear temporary testing variables.'''
# Return sys.stdin to its normal state.
sys.stdin = self.old_stdin
=========================================================
When I run the tests I get:
==========================================================
c:\thinkpython2\ch3\ex_3-3>py -m unittest
Number of sides = .Number of sides = 'Number of sides' must be a
positive integer. Please enter an integer.
Number of sides = E...
======================================================================
ERROR: test_get_input_value_error (test_draw2x2grid.TestGetInput)
Test that get_input() raises a ValueError if improper input
----------------------------------------------------------------------
Traceback (most recent call last):
File "c:\thinkpython2\ch3\ex_3-3\test_draw2x2grid.py", line 126, in
test_get_input_value_error
draw2x2grid.get_input()
File "c:\thinkpython2\ch3\ex_3-3\draw2x2grid.py", line 50, in get_input
num_sides = int(input("Number of sides = "))
EOFError: EOF when reading a line
----------------------------------------------------------------------
Ran 5 tests in 0.004s
FAILED (errors=1)
======================================================================
I do not understand what is causing the EOFError. If I change
"sys.stdin = StringIO('a')" with "sys.stdin = StringIO('1')" I get
what I expect:
======================================================================
c:\thinkpython2\ch3\ex_3-3>py -m unittest
Number of sides = .Number of sides = F...
======================================================================
FAIL: test_get_input_value_error (test_draw2x2grid.TestGetInput)
Test that get_input() raises a ValueError if improper input
----------------------------------------------------------------------
Traceback (most recent call last):
File "c:\thinkpython2\ch3\ex_3-3\test_draw2x2grid.py", line 126, in
test_get_input_value_error
draw2x2grid.get_input()
AssertionError: ValueError not raised
----------------------------------------------------------------------
Ran 5 tests in 0.003s
FAILED (failures=1)
======================================================================
I am currently quite stumped. What is it I am not seeing?
--
boB
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