def test_question_1(self):
self.assertEqual(str(interval('[]')),"The interval is not valid");
self.assertEqual(str(interval('[a,b]')),"The interval is not valid");
self.assertEqual(str(interval('[1,,5]')),"The interval is not valid");
self.assertEqual(str(interval('(11)')),"The interval is not valid");
self.assertEqual(str(interval('[1,1)')),"The interval is not valid");
self.assertEqual(str(interval('[-2,5]')),"[-2,5] represents the numbers -2 to 5");
self.assertEqual(str(interval('[-2,5)')),"[-2,5) represents the numbers -2 to 4");
self.assertEqual(str(interval('(-2,5)')),"(-2,5) represents the numbers -1 to 4");
self.assertEqual(str(interval('(-2,5]')),"(-2,5] represents the numbers -1 to 5");
def test_question_1(self):
self.assertEqual(str(interval("[]")), "The interval is not valid")
self.assertEqual(str(interval("[a,b]")), "The interval is not valid")
self.assertEqual(str(interval("[1,,5]")), "The interval is not valid")
self.assertEqual(str(interval("(11)")), "The interval is not valid")
self.assertEqual(str(interval("[1,1)")), "The interval is not valid")
self.assertEqual(str(interval("[-2,5]")), "[-2,5] represents the numbers -2 to 5")
self.assertEqual(str(interval("[-2,5)")), "[-2,5) represents the numbers -2 to 4")
self.assertEqual(str(interval("(-2,5)")), "(-2,5) represents the numbers -1 to 4")
self.assertEqual(str(interval("(-2,5]")), "(-2,5] represents the numbers -1 to 5")
else:
return ['[1,-1]']
else:
return ['[1,-1]']
else:
return ['[1,-1]']
#Let the user input a list of intervals
user_list=input("A list of intervals? Quit the program by entering quit\n");
#If the input is not quit, we will justify the validity of the interval list
if user_list!='quit':
interval_list=transform(user_list);
#Justify if the intervals are valid
n=len(interval_list);
for i in range(n):
s=interval(interval_list[i])
if str(s)=='The interval is not valid':
break
#If the input is not quit and not valid interval list, the user will re-input
while user_list!='quit' and str(s)=='The interval is not valid':
user_list=input("The input intervals are not valid, please input again. A list of intervals? Quit the program by entering quit\n");
if user_list!='quit':
interval_list=transform(user_list);
#Justify if the intervals are valid
n=len(interval_list);
for i in range(n):
s=interval(interval_list[i])
if str(s)=='The interval is not valid':
break
#The next process will be ignored if no valid interval list has been inputed