mcs/class/Microsoft.VisualBasic/Test/standalone/6881.vb

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  22
  23
  24 Imports Microsoft.VisualBasic
  25 Imports System.IO
  26
  27 Public Class TestClass
  28     Public Function Test() As String
  29         Dim caughtException As Boolean
  30         Dim fn As Integer
  31
  32         '// make sure all files are closed
  33         Microsoft.VisualBasic.FileSystem.Reset()
  34
  35         '// create a file for the test
  36         Dim SourceFile As String
  37         Dim DestinationFile As String
  38         SourceFile = System.IO.Directory.GetCurrentDirectory() + "\data\textfile.txt"
  39         DestinationFile = System.IO.Directory.GetCurrentDirectory() + "\data\6881.txt"
  40         Dim f As System.IO.FileInfo = New System.IO.FileInfo(DestinationFile)
  41         If (f.Exists) Then
  42             Kill(DestinationFile)
  43         End If
  44         FileCopy(SourceFile, DestinationFile)
  45
  46
  47         '// File mode is invalid.
        caughtException = False
        Try
            fn = FreeFile()
  48             FileOpen(fn, System.IO.Directory.GetCurrentDirectory() + "\data\6881.txt", OpenMode.Input)
  49             Print(fn, "abc")
  50             FileClose(fn)
  51         Catch e As IOException
            If Err.Number = 54 Then
                caughtException = True
            End If
        End Try
        If caughtException = False Then Return "sub test 1 failed"
  52
  53         '// FileNumber does not exist.
  54         caughtException = False
        Try
            Print(256, "abc")
        Catch e As IOException
            If Err.Number = 52 Then
                caughtException = True
            End If
        End Try
        If caughtException = False Then Return "sub test 2 failed"
  55
  56         Return "success"
  57
  58     End Function
  59 End Class