update test_cases.py

Author: Mzid Ahmed

test_cases.py

@@ -1,5 +1,7 @@
+import sys
 from glob import *
 
+state = 0
 
 for file in glob("*.*"):
     if(file != "test_cases.py"):
@@ -11,8 +13,11 @@
                 # Test case 1 is checking if there are illegal tabulators in the code
                 if line.find("\t") != -1:
                     print(file + " in line " + str(i) + ": not permitted tab found")
+                    state = 1
 
                 # Test case 2 is checking if there are more than the two allowed '/'
                 if line.find("///") != -1:
                     print(file + " in line " + str(i) + ": not permitted use of '///' ")
-
+                    state = 1
+					
+sys.exit(state)