Lib/test/test_exceptions.py

   1 # Python test set -- part 5, built-in exceptions
   2
   3 from test_support import *
   4 from types import ClassType
   5
   6 print '5. Built-in exceptions'
   7 # XXX This is not really enough, each *operation* should be tested!
   8
   9 def r(thing):
  10     if type(thing) == ClassType:
  11         print thing.__name__
  12     else:
  13         print thing
  14
  15 r(AttributeError)
  16 import sys
  17 try: x = sys.undefined_attribute
  18 except AttributeError: pass
  19
  20 r(EOFError)
  21 import sys
  22 fp = open(TESTFN, 'w')
  23 fp.close()
  24 fp = open(TESTFN, 'r')
  25 savestdin = sys.stdin
  26 try:
  27         try:
  28                 sys.stdin = fp
  29                 x = raw_input()
  30         except EOFError:
  31                 pass
  32 finally:
  33         sys.stdin = savestdin
  34         fp.close()
  35
  36 r(IOError)
  37 try: open('this file does not exist', 'r')
  38 except IOError: pass
  39
  40 r(ImportError)
  41 try: import undefined_module
  42 except ImportError: pass
  43
  44 r(IndexError)
  45 x = []
  46 try: a = x[10]
  47 except IndexError: pass
  48
  49 r(KeyError)
  50 x = {}
  51 try: a = x['key']
  52 except KeyError: pass
  53
  54 r(KeyboardInterrupt)
  55 print '(not testable in a script)'
  56
  57 r(MemoryError)
  58 print '(not safe to test)'
  59
  60 r(NameError)
  61 try: x = undefined_variable
  62 except NameError: pass
  63
  64 r(OverflowError)
  65 x = 1
  66 try:
  67         while 1: x = x+x
  68 except OverflowError: pass
  69
  70 r(RuntimeError)
  71 print '(not used any more?)'
  72
  73 r(SyntaxError)
  74 try: exec '/\n'
  75 except SyntaxError: pass
  76
  77 r(SystemError)
  78 print '(hard to reproduce)'
  79
  80 r(SystemExit)
  81 import sys
  82 try: sys.exit(0)
  83 except SystemExit: pass
  84
  85 r(TypeError)
  86 try: [] + ()
  87 except TypeError: pass
  88
  89 r(ValueError)
  90 try: x = chr(10000)
  91 except ValueError: pass
  92
  93 r(ZeroDivisionError)
  94 try: x = 1/0
  95 except ZeroDivisionError: pass
  96
  97 unlink(TESTFN)