def test_range(self):
"Does draw raise a ValueError an argument is a non-positive integer?"
n = 4 #number of arguments of graphpaper.draw
for i in range(n):
with self.assertRaises(ValueError):
args = n * [1] #a list of n copies of 1
args[i] = 0 #Introduce a bad argument.
graphpaper.draw(*args)
def test_type(self):
"Does draw raise a TypeError if an argument is a non-integer?"
n = 4 #number of arguments of graphpaper.draw
badArgs = (None, "", 1.0, (), [], {}, set()) #True and False are ints.
for i in range(n):
for badArg in badArgs):
with self.assertRaises(TypeError):
args = n * [1] #a list of n copies of 1
args[i] = badArg #Introduce a bad argument.
graphpaper.draw(*args)
def test_return(self):
"Does draw return the correct value?"
n = 5 #maximum dimension
for rowsOfBoxes in range(1, n):
for columnsOfBoxes in range(1, n):
for rowsOfSpaces in range(1, n):
for columnsOfSpaces in range(1, n):
top = "+" + columnsOfSpaces * "-"
mid = "|" + columnsOfSpaces * " "
tops = columnsOfBoxes * top + "\n"
mids = columnsOfBoxes * mid + "\n"
correct = rowsOfBoxes * (tops + rowsOfSpaces * mids)
self.assertEqual(correct, graphpaper.draw(
rowsOfBoxes, columnsOfBoxes,
rowsOfSpaces, columnsOfSpaces
))