public MFTestResults FileAccess_ReadWrite()
{
// Clean up incase file exists
if (File.Exists(fileName))
{
File.Delete(fileName);
}
MFTestResults result = MFTestResults.Pass;
try
{
// From MSDN:
// Write access to the file. Data can be written to the file.
// Combine with Read for read/write access.
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))
{
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("Write after read");
fs.Seek(0, SeekOrigin.End);
if (!FileStreamHelper.Write(fs, 500))
{
result = MFTestResults.Fail;
}
}
// 300 bytes original + 1000 bytes + 500 bytes
if (!FileStreamHelper.VerifyFile(fileName, 1800))
{
result = MFTestResults.Fail;
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults FileMode_Open()
{
// 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.
// The ability to open the file is dependent on the value specified
// by FileAccess. A System.IO..::.FileNotFoundException is thrown
// if the file does not exist.
try
{
Log.Comment("Non-existent file open should throw");
using (FileStream fs = new FileStream(fileName, FileMode.Open)) { }
result = MFTestResults.Fail;
Log.Exception("Expected IOException");
}
catch (IOException) { /* pass case */ }
// Create file
File.Create(fileName).Close();
Log.Comment("Open existing file");
using (FileStream fs = new FileStream(fileName, FileMode.Open))
{
if (!FileStreamHelper.WriteReadEmpty(fs))
{
result = MFTestResults.Fail;
}
}
if (!FileStreamHelper.VerifyFile(fileName, 300))
{
result = MFTestResults.Fail;
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
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 FileAccess_Read()
{
// Clean up incase file exists
if (File.Exists(fileName))
{
File.Delete(fileName);
}
MFTestResults result = MFTestResults.Pass;
try
{
// From MSDN:
// Read access to the file. Data can be read from the file.
// Combine with Write for read/write access.
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.Read))
{
Log.Comment("Should be able to read");
if (!FileStreamHelper.VerifyRead(fs))
{
result = MFTestResults.Fail;
}
Log.Comment("Shouldn't be able to write");
try
{
fs.Write(new byte[] { 1, 2, 3 }, 0, 3);
result = MFTestResults.Fail;
Log.Exception("Expected NotSupportedException");
}
catch (NotSupportedException) { /* pass case */ }
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults FileMode_CreateNew()
{
// 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 create a new file.
// This requires FileIOPermissionAccess..::.Write. If the file
// already exists, an IOException is thrown.
Log.Comment("Non-existent file, should create file");
using (FileStream fs = new FileStream(fileName, FileMode.CreateNew))
{
if (!FileStreamHelper.WriteReadEmpty(fs))
{
result = MFTestResults.Fail;
}
}
if (!FileStreamHelper.VerifyFile(fileName, 300))
{
result = MFTestResults.Fail;
}
try
{
Log.Comment("Exists file CreateNew");
using (FileStream fs = new FileStream(fileName, FileMode.CreateNew)) { }
result = MFTestResults.Fail;
Log.Exception("Expected IOException");
}
catch (IOException) { /* pass case */ }
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
private void OpenRead()
{
try
{
threadResult &= FileStreamHelper.VerifyFile(fileName);
}
catch (IOException)
{
if (!restricted)
{
threadResult = false;
Log.Exception("Unexpected IOException");
}
}
catch (Exception ex)
{
threadResult = false;
Log.Exception("Unexpected Exception " + ex.Message);
}
}
public MFTestResults Flush_Write()
{
Log.Comment("This test case requires the previous test case to write a properly formatted 5k file");
if (!FileStreamHelper.VerifyFile(sourceFile, 5000))
{
return(MFTestResults.Skip);
}
MFTestResults result = MFTestResults.Pass;
try
{
// read bytes from source file
byte[] data = File.ReadAllBytes(sourceFile);
using (FileStream fs = new FileStream(fileName, FileMode.CreateNew))
{
fs.Write(data, 0, data.Length);
fs.Flush();
if (fs.Length != 5000)
{
result = MFTestResults.Fail;
Log.Comment("Expected 5000 bytes in file");
}
fs.Seek(0, SeekOrigin.Begin);
if (!FileStreamHelper.VerifyRead(fs))
{
result = MFTestResults.Fail;
}
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
private void OpenWrite()
{
try
{
using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Write, FileShare.ReadWrite))
{
threadResult &= FileStreamHelper.Write(fs, 200);
}
}
catch (IOException)
{
if (!restricted)
{
threadResult = false;
Log.Exception("Unexpected IOException");
}
}
catch (Exception ex)
{
threadResult = false;
Log.Exception("Unexpected Exception " + ex.Message);
}
}
public MFTestResults Flush_WriteByte()
{
// Clean up incase file exists
if (File.Exists(fileName))
{
File.Delete(fileName);
}
MFTestResults result = MFTestResults.Pass;
try
{
Log.Comment("Verify flush of 5000k using WriteByte");
using (FileStream fs = new FileStream(sourceFile, FileMode.CreateNew))
{
FileStreamHelper.Write(fs, 5000);
fs.Flush();
if (fs.Length != 5000)
{
result = MFTestResults.Fail;
Log.Comment("Expected 5000 bytes in file");
}
fs.Seek(0, SeekOrigin.Begin);
if (!FileStreamHelper.VerifyRead(fs))
{
result = MFTestResults.Fail;
}
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults VanillaWrite()
{
if (File.Exists(fileName))
{
File.Delete(fileName);
}
MFTestResults result = MFTestResults.Pass;
try
{
using (FileStream fs = new FileStream(fileName, FileMode.CreateNew))
{
Log.Comment("Write 256 bytes of data");
if (!TestWrite(fs, 256))
{
result = MFTestResults.Fail;
}
Log.Comment("Write middle of buffer");
if (!TestWrite(fs, 256, 100, 100))
{
result = MFTestResults.Fail;
}
// 1000 - 256 - 100 = 644
Log.Comment("Write start of buffer");
if (!TestWrite(fs, 1000, 644, 0))
{
result = MFTestResults.Fail;
}
Log.Comment("Write end of buffer");
if (!TestWrite(fs, 1000, 900, 100))
{
result = MFTestResults.Fail;
}
Log.Comment("Rewind and verify all bytes written");
fs.Seek(0, SeekOrigin.Begin);
if (!FileStreamHelper.VerifyRead(fs))
{
result = MFTestResults.Fail;
}
Log.Comment("Verify Read validation with UTF8 string");
fs.SetLength(0);
string test = "MFFramework Test";
fs.Write(UTF8Encoding.UTF8.GetBytes(test), 0, test.Length);
fs.Flush();
fs.Seek(0, SeekOrigin.Begin);
byte[] readbuff = new byte[20];
fs.Read(readbuff, 0, readbuff.Length);
string testResult = new string(Encoding.UTF8.GetChars(readbuff));
if (test != testResult)
{
result = MFTestResults.Fail;
Log.Comment("Exepected: " + test + ", but got: " + testResult);
}
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults FileShare_Read()
{
// Clean up incase file exists
if (File.Exists(fileName))
{
File.Delete(fileName);
}
MFTestResults result = MFTestResults.Pass;
try
{
// From MSDN:
// Declines sharing of the current file. Any request to open the file
// (by this process or another process) will fail until the file is closed.
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.Read))
{
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;
}
Log.Comment("Try to Write in same thread");
try
{
using (FileStream fs2 = new FileStream(fileName, FileMode.Open, FileAccess.Write, FileShare.ReadWrite)) { }
result = MFTestResults.Fail;
Log.Exception("Expected IOException");
}
catch (IOException) { /* pass case */ }
Log.Comment("Try to Write in another thread");
restricted = true;
threadResult = true;
worker = new Thread(OpenWrite);
worker.Start();
worker.Join();
if (!threadResult)
{
result = MFTestResults.Fail;
}
Log.Comment("Write after read other access attempt");
fs.Seek(0, SeekOrigin.End);
if (!FileStreamHelper.Write(fs, 500))
{
result = MFTestResults.Fail;
}
}
Log.Comment("Verify file after close - 300 bytes original + 1000 bytes + 500 bytes");
if (!FileStreamHelper.VerifyFile(fileName, 1800))
{
result = MFTestResults.Fail;
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults InvalidCases()
{
if (File.Exists(fileName))
{
File.Delete(fileName);
}
FileStream fs = new FileStream(fileName, FileMode.Create);
FileStreamHelper.Write(fs, 1000);
fs.Seek(0, SeekOrigin.Begin);
byte[] readbuff = new byte[1024];
MFTestResults result = MFTestResults.Pass;
try
{
try
{
Log.Comment("Read to null buffer");
int read = fs.Read(null, 0, readbuff.Length);
result = MFTestResults.Fail;
Log.Exception("Expected ArgumentNullException, but got " + read + " + bytes");
}
catch (ArgumentNullException) { /* pass case */ }
try
{
Log.Comment("Read to negative offset");
int read = fs.Read(readbuff, -1, readbuff.Length);
result = MFTestResults.Fail;
Log.Exception("Expected ArgumentOutOfRangeException, but got " + read + " + bytes");
}
catch (ArgumentOutOfRangeException) { /* pass case */ }
try
{
Log.Comment("Read to out of range offset");
int read = fs.Read(readbuff, readbuff.Length + 1, readbuff.Length);
result = MFTestResults.Fail;
Log.Exception("Expected ArgumentException, but got " + read + " + bytes");
}
catch (ArgumentException) { /* pass case */ }
try
{
Log.Comment("Read negative count");
int read = fs.Read(readbuff, 0, -1);
result = MFTestResults.Fail;
Log.Exception("Expected ArgumentOutOfRangeException, but got " + read + " + bytes");
}
catch (ArgumentOutOfRangeException) { /* pass case */ }
try
{
Log.Comment("Read count larger then buffer");
int read = fs.Read(readbuff, 0, readbuff.Length + 1);
result = MFTestResults.Fail;
Log.Exception("Expected ArgumentException, but got " + read + " + bytes");
}
catch (ArgumentException) { /* pass case */ }
try
{
Log.Comment("Read closed stream");
fs.Close();
int read = fs.Read(readbuff, 0, readbuff.Length);
result = MFTestResults.Fail;
Log.Exception("Expected ObjectDisposedException, but got " + read + " + bytes");
}
catch (ObjectDisposedException) { /* pass case */ }
try
{
Log.Comment("Read disposed stream");
fs = new FileStream(fileName, FileMode.Open);
fs.Dispose();
int read = fs.Read(readbuff, 0, readbuff.Length);
result = MFTestResults.Fail;
Log.Exception("Expected ObjectDisposedException, but got " + read + " + bytes");
}
catch (ObjectDisposedException) { /* pass case */ }
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
finally
{
if (fs != null)
{
fs.Dispose();
}
}
return(result);
}
public MFTestResults VanillaRead()
{
if (File.Exists(fileName))
{
File.Delete(fileName);
}
using (FileStream fs = new FileStream(fileName, FileMode.Create))
{
FileStreamHelper.Write(fs, 1000);
}
MFTestResults result = MFTestResults.Pass;
try
{
using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.ReadWrite))
{
Log.Comment("Read 256 bytes of data");
if (!TestRead(fs, 256))
{
result = MFTestResults.Fail;
}
Log.Comment("Request less bytes then buffer");
if (!TestRead(fs, 256, 100, 100))
{
result = MFTestResults.Fail;
}
// 1000 - 256 - 100 = 644
Log.Comment("Request more bytes then file");
if (!TestRead(fs, 1000, 1000, 644))
{
result = MFTestResults.Fail;
}
Log.Comment("Request bytes after EOF");
if (!TestRead(fs, 100, 100, 0))
{
result = MFTestResults.Fail;
}
Log.Comment("Rewind and read entire file in one buffer larger then file");
fs.Seek(0, SeekOrigin.Begin);
if (!TestRead(fs, 1001, 1001, 1000))
{
result = MFTestResults.Fail;
}
Log.Comment("Verify Read validation with UTF8 string");
fs.SetLength(0);
string test = "MFFramework Test";
fs.Write(UTF8Encoding.UTF8.GetBytes(test), 0, test.Length);
fs.Flush();
fs.Seek(0, SeekOrigin.Begin);
byte[] readbuff = new byte[20];
fs.Read(readbuff, 0, readbuff.Length);
string testResult = new string(Encoding.UTF8.GetChars(readbuff));
if (test != testResult)
{
result = MFTestResults.Fail;
Log.Comment("Exepected: " + test + ", but got: " + testResult);
}
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults InvalidCases()
{
if (File.Exists(fileName))
{
File.Delete(fileName);
}
FileStream fs = new FileStream(fileName, FileMode.Create);
FileStreamHelper.Write(fs, 1000);
long seek;
MFTestResults result = MFTestResults.Pass;
try
{
try
{
Log.Comment("Seek -1 from Begin");
seek = fs.Seek(-1, SeekOrigin.Begin);
result = MFTestResults.Fail;
Log.Exception("Expected IOException, but got position " + seek);
}
catch (IOException) { /* pass case */ }
try
{
Log.Comment("Seek -1001 from Current - at end from write");
seek = fs.Seek(-1001, SeekOrigin.Current);
result = MFTestResults.Fail;
Log.Exception("Expected IOException, but got position " + seek);
}
catch (IOException) { /* pass case */ }
try
{
Log.Comment("Seek -1001 from End");
seek = fs.Seek(-1001, SeekOrigin.End);
result = MFTestResults.Fail;
Log.Exception("Expected IOException, but got position " + seek);
}
catch (IOException) { /* pass case */ }
try
{
Log.Comment("Seek invalid -1 origin");
seek = fs.Seek(1, (SeekOrigin)(-1));
result = MFTestResults.Fail;
Log.Exception("Expected ArgumentException, but got position " + seek);
}
catch (ArgumentException) { /* pass case */ }
try
{
Log.Comment("Seek invalid 10 origin");
seek = fs.Seek(1, (SeekOrigin)10);
result = MFTestResults.Fail;
Log.Exception("Expected ArgumentException, but got position " + seek);
}
catch (ArgumentException) { /* pass case */ }
try
{
Log.Comment("Seek with closed socket");
fs.Close();
seek = fs.Seek(0, SeekOrigin.Begin);
result = MFTestResults.Fail;
Log.Exception("Expected ObjectDisposedException, but got position " + seek);
}
catch (ObjectDisposedException) { /* pass case */ }
try
{
Log.Comment("Seek with disposed socket");
fs.Dispose();
seek = fs.Seek(0, SeekOrigin.End);
result = MFTestResults.Fail;
Log.Exception("Expected ObjectDisposedException, but got position " + seek);
}
catch (ObjectDisposedException) { /* pass case */ }
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
finally
{
if (fs != null)
{
fs.Dispose();
}
}
return(result);
}
public MFTestResults ValidCases()
{
MFTestResults result = MFTestResults.Pass;
try
{
if (File.Exists(fileName))
{
File.Delete(fileName);
}
using (FileStream fs = new FileStream(fileName, FileMode.Create))
{
FileStreamHelper.Write(fs, 1000);
Log.Comment("Seek to beginning");
if (!TestSeek(fs, 0, SeekOrigin.Begin, 0))
{
result = MFTestResults.Fail;
}
Log.Comment("Seek forward offset from begging");
if (!TestSeek(fs, 10, SeekOrigin.Begin, 0))
{
result = MFTestResults.Fail;
}
Log.Comment("Seek backwards offset from current");
if (!TestSeek(fs, -5, SeekOrigin.Current, 5))
{
result = MFTestResults.Fail;
}
Log.Comment("Seek forwards offset from current");
if (!TestSeek(fs, 20, SeekOrigin.Current, 25))
{
result = MFTestResults.Fail;
}
Log.Comment("Seek to end");
if (!TestSeek(fs, 0, SeekOrigin.End, 1000))
{
result = MFTestResults.Fail;
}
Log.Comment("Seek backwards offset from end");
if (!TestSeek(fs, -35, SeekOrigin.End, 965))
{
result = MFTestResults.Fail;
}
Log.Comment("Seek past end relative to End");
if (!TestExtend(fs, 1, SeekOrigin.End, 1001, 1002))
{
result = MFTestResults.Fail;
}
Log.Comment("Seek past end relative to Begin");
if (!TestExtend(fs, 1002, SeekOrigin.Begin, 1002, 1003))
{
result = MFTestResults.Fail;
}
Log.Comment("Seek past end relative to Current");
if (!TestSeek(fs, 995, SeekOrigin.Begin, 995))
{
result = MFTestResults.Fail;
}
if (!TestExtend(fs, 10, SeekOrigin.Current, 1005, 1006))
{
result = MFTestResults.Fail;
}
// 1000 --123456
// verify 011001
Log.Comment("Verify proper bytes written at end (zero'd bytes from seek beyond end)");
byte[] buff = new byte[6];
byte[] verify = new byte[] { 0, 1, 1, 0, 0, 1 };
fs.Seek(-6, SeekOrigin.End);
fs.Read(buff, 0, buff.Length);
for (int i = 0; i < buff.Length; i++)
{
if (buff[i] != verify[i])
{
result = MFTestResults.Fail;
Log.Comment("Position " + i + ":" + buff[i] + " != " + verify[i]);
}
}
}
}
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_Write()
{
// 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 writing. If this flag
// is not specified, any request to open the file for 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.Write))
{
// 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");
try
{
using (FileStream fs2 = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) { }
result = MFTestResults.Fail;
Log.Exception("FileAccess.Read - Expected IOException");
}
catch (IOException) { /* pass case */ }
Log.Comment("Try to Read in another thread");
restricted = true;
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;
}
// 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 + 200 500 = 2500
Log.Comment("Verify file after close");
if (!FileStreamHelper.VerifyFile(fileName, 2500))
{
result = MFTestResults.Fail;
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults FileMode_Create()
{
// 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 create a new file.
// If the file already exists, it will be overwritten. This requires
// FileIOPermissionAccess..::.Write. System.IO.FileMode.Create is
// equivalent to requesting that if the file does not exist, use
// CreateNew; otherwise, use Truncate.
Log.Comment("Non-existent file, should create file");
using (FileStream fs = new FileStream(fileName, FileMode.Create))
{
if (!FileStreamHelper.WriteReadEmpty(fs))
{
result = MFTestResults.Fail;
}
// add additional 50 bytes, to test that truncation really happens
FileStreamHelper.Write(fs, 50);
}
Log.Comment("Add Attribute, to verify Truncate behavior");
File.SetAttributes(fileName, FileAttributes.Hidden);
Log.Comment("Existing file, should treat as truncate");
using (FileStream fs = new FileStream(fileName, FileMode.Create))
{
if (!FileStreamHelper.Write(fs, 300))
{
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);
}
// Verify the 300 bytes we wrote (not original 350)
if (!FileStreamHelper.VerifyFile(fileName, 300))
{
result = MFTestResults.Fail;
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
public MFTestResults FileMode_Append()
{
// Clean up incase file exists
if (File.Exists(fileName))
{
File.Delete(fileName);
}
MFTestResults result = MFTestResults.Pass;
try
{
// From MSDN:
// Opens the file if it exists and seeks to the end of the file,
// or creates a new file. FileMode.Append can only be used in
// conjunction with FileAccess.Write. Attempting to seek to a position
// before the end of the file will throw an IOException and any attempt
// to read fails and throws an NotSupportedException.
Log.Comment("Non-existent file, should create file");
using (FileStream fs = new FileStream(fileName, FileMode.Append))
{
fs.WriteByte((byte)0);
fs.WriteByte((byte)1);
fs.WriteByte((byte)2);
}
Log.Comment("Existing file, should seek to end on open");
using (FileStream fs = new FileStream(fileName, FileMode.Append))
{
if (fs.Position != 3)
{
result = MFTestResults.Fail;
Log.Exception("Expected postion 3, but got " + fs.Position);
}
Log.Comment("Try to Seek before append");
try
{
fs.Seek(1, SeekOrigin.Begin);
result = MFTestResults.Fail;
Log.Exception("Unexpectedly able to seek");
}
catch (IOException) { /* pass case */ }
Log.Comment("Try to read");
try
{
byte[] buff = new byte[1];
fs.Read(buff, 0, buff.Length);
result = MFTestResults.Fail;
Log.Exception("Unexpectedly able to read");
}
catch (NotSupportedException) { /* pass case */ }
Log.Comment("append to file");
fs.WriteByte((byte)3);
fs.WriteByte((byte)4);
fs.WriteByte((byte)5);
Log.Comment("try to seek to start of append");
fs.Seek(-3, SeekOrigin.End);
}
if (!FileStreamHelper.VerifyFile(fileName, 6))
{
result = MFTestResults.Fail;
}
}
catch (Exception ex)
{
Log.Exception("Unexpected exception: " + ex.Message);
result = MFTestResults.Fail;
}
return(result);
}
