public MFTestResults FileMode_OpenOrCreate()
{
// Clean up incase file exists
if (File.Exists(fileName))
{
File.Delete(fileName);
}
MFTestResults result = MFTestResults.Pass;
try
{
// From MSDN:
// Specifies that the operating system should open a file if it exists; otherwise,
// a new file should be created. If the file is opened with FileAccess.Read,
// FileIOPermissionAccess..::.Read is required. If the file access is
// FileAccess.Write then FileIOPermissionAccess..::.Write is required. If the file
// is opened with FileAccess.ReadWrite, both FileIOPermissionAccess..::.Read and
// FileIOPermissionAccess..::.Write are required. If the file access is
// FileAccess.Append, then FileIOPermissionAccess..::.Append is required.
Log.Comment("Non-existent file, should create file");
using (FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate))
{
if (!FileStreamHelper.WriteReadEmpty(fs))
{
result = MFTestResults.Fail;
}
}
Log.Comment("Open existing file");
using (FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate))
{
if (!FileStreamHelper.WriteReadVerify(fs))
{
result = MFTestResults.Fail;
}
}
if (!FileStreamHelper.VerifyFile(fileName, 600))
{
result = MFTestResults.Fail;
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults FileMode_Truncate()
{
// Clean up incase file exists
if (File.Exists(fileName))
{
File.Delete(fileName);
}
MFTestResults result = MFTestResults.Pass;
try
{
// From MSDN:
// Specifies that the operating system should open an existing file.
// Once opened, the file should be truncated so that its size is zero
// bytes. This requires FileIOPermissionAccess..::.Write. Attempts to
// read from a file opened with Truncate cause an exception.
try
{
Log.Comment("Non-existent file truncate");
using (FileStream fs = new FileStream(fileName, FileMode.Truncate)) { }
result = MFTestResults.Fail;
Log.Exception("Expected IOException");
}
catch (IOException) { /* pass case */ }
Log.Comment("Create a new file and populate");
using (FileStream fs = new FileStream(fileName, FileMode.CreateNew))
{
if (!FileStreamHelper.WriteReadVerify(fs))
{
result = MFTestResults.Fail;
}
// add extra bytes, to make sure we really truncate
FileStreamHelper.Write(fs, 50);
}
Log.Comment("Add Attribute, to verify Truncate behavior");
File.SetAttributes(fileName, FileAttributes.Hidden);
Log.Comment("Open Truncate");
using (FileStream fs = new FileStream(fileName, FileMode.Truncate))
{
if (!FileStreamHelper.WriteReadEmpty(fs))
{
result = MFTestResults.Fail;
}
Log.Comment("Trying to read file while its open Truncate should fail");
try
{
using (FileStream fs2 = new FileStream(fileName, FileMode.Open, FileAccess.Read)) {}
result = MFTestResults.Fail;
Log.Exception("Unexpectedly able to read file");
}
catch (IOException) { /* pass case */ }
}
Log.Comment("Verify hidden property is still set");
FileAttributes fa = File.GetAttributes(fileName);
if ((fa & FileAttributes.Hidden) == 0)
{
result = MFTestResults.Fail;
Log.Exception("Expected hidden attribute, but got " + fa);
}
if (!FileStreamHelper.VerifyFile(fileName, 300))
{
result = MFTestResults.Fail;
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults FileShare_ReadWrite()
{
// Clean up incase file exists
if (File.Exists(fileName))
{
File.Delete(fileName);
}
MFTestResults result = MFTestResults.Pass;
try
{
// From MSDN:
// Allows subsequent opening of the file for reading or writing. If this
// flag is not specified, any request to open the file for reading or
// writing (by this process or another process) will fail until the file
// is closed. However, even if this flag is specified, additional
// permissions might still be needed to access the file.
// 300 bytes
Log.Comment("Create file for testing");
using (FileStream fs = new FileStream(fileName, FileMode.CreateNew))
{
FileStreamHelper.WriteReadEmpty(fs);
}
using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite))
{
// 1000 bytes
Log.Comment("Should be able to write");
if (!FileStreamHelper.Write(fs, 1000))
{
result = MFTestResults.Fail;
}
Log.Comment("Should be able to read");
fs.Seek(0, SeekOrigin.Begin);
if (!FileStreamHelper.VerifyRead(fs))
{
result = MFTestResults.Fail;
}
Log.Comment("Try to Read in same thread");
if (!FileStreamHelper.VerifyFile(fileName))
{
result = MFTestResults.Fail;
}
Log.Comment("Try to Read in another thread");
restricted = false;
threadResult = true;
Thread worker = new Thread(OpenRead);
worker.Start();
worker.Join();
if (!threadResult)
{
result = MFTestResults.Fail;
}
// 500 bytes
Log.Comment("Try to Write in same thread");
using (FileStream fs2 = new FileStream(fileName, FileMode.Open, FileAccess.Write, FileShare.ReadWrite))
{
FileStreamHelper.Write(fs2, 500);
}
// 200 bytes
Log.Comment("Try to Write in another thread");
restricted = false;
threadResult = true;
worker = new Thread(OpenWrite);
worker.Start();
worker.Join();
if (!threadResult)
{
result = MFTestResults.Fail;
}
// 300 bytes
Log.Comment("Try to ReadWrite");
using (FileStream fs2 = new FileStream(fileName, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite))
{
if (!FileStreamHelper.WriteReadVerify(fs2))
{
result = MFTestResults.Fail;
}
}
// 500 bytes
Log.Comment("Write after read other access attempt");
fs.Seek(0, SeekOrigin.End);
if (!FileStreamHelper.Write(fs, 500))
{
result = MFTestResults.Fail;
}
}
// 300 + 1000 + 500 + 200 + 300 + 500 = 2800
Log.Comment("Verify file after close");
if (!FileStreamHelper.VerifyFile(fileName, 2800))
{
result = MFTestResults.Fail;
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}