Lib/test/test_exceptions.py

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