basic/qa/basic_coverage/test_string_overflow_safe.bas

   1 Option Explicit
   2
   3 Function doUnitTest As String
   4     ' Trying to create too long string should generate proper BASIC overflow error.
   5     ' Longest possible string is 2147483638 wchar_t (2G - 10).
   6     ' This tries to create string with 2G wchar_t. If it does not overflow, test fails.
   7     ' If overflow is not safe, it segfaults.
   8     On Error GoTo errorHandler
   9     Dim s As String, i As Integer
  10     s = "0"
  11     For i=1 To 31
  12     s = s & s
  13     Next i
  14     doUnitTest = "FAIL"
  15     Exit Function
  16 errorHandler:
  17     If ( Err <> 6 ) Then
  18         doUnitTest = "FAIL"
  19     Else
  20         doUnitTest = "OK"
  21     Endif
  22 End Function