TestStreamWrite_WriteBeyondInitialAllocatedBuffer() // check that we reallocated teh buffer and retained its contents correctly
{
DebugStream stm = new DebugStream();
byte[] rgbWrite = Encoding.UTF8.GetBytes("0123456789");
// write at the beginning (to make sure its retained)
stm.Write(rgbWrite, 0, 10);
stm.Position = 1020;
Assert.AreEqual(1024, stm.m_cbStream);
stm.Write(rgbWrite, 0, 10);
Assert.LessOrEqual(1024 + 4096, stm.m_cbStream);
stm.Position = 1020;
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
// and now lets make sure the initial write has been preserved
stm.Position = 0;
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
}
public static void TestStreamWriteToLimitOfAllocBuffer_WriteAgainToGrowBuffer()
{
DebugStream stm = new DebugStream();
byte[] rgbWrite = Encoding.UTF8.GetBytes("0123456789");
// write at the very end (but not over)
stm.Position = 1014;
stm.Write(rgbWrite, 0, 10);
Assert.AreEqual(1024, stm.m_cbStream);
stm.Write(rgbWrite, 0, 10);
Assert.LessOrEqual(1024 + 4096, stm.m_cbStream);
stm.Position = 1014;
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
// and now lets make sure the initial write has been preserved
stm.Position = 1024;
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
}
public static void TestStreamSeek()
{
DebugStream stm = StmInit("01234");
Assert.AreEqual(5, stm.Seek(0, SeekOrigin.Current));
Assert.AreEqual(5, stm.Seek(0, SeekOrigin.End));
byte[] rgb = new byte[1];
Assert.AreEqual(0, stm.Read(rgb, 0, 1));
Assert.AreEqual(0, stm.Seek(0, SeekOrigin.Begin));
Assert.AreEqual(1, stm.Read(rgb, 0, 1));
Assert.AreEqual(1, stm.Seek(0, SeekOrigin.Current));
Assert.AreEqual(Encoding.UTF8.GetBytes("0"), rgb);
Assert.AreEqual(4, stm.Seek(-1, SeekOrigin.End));
Assert.AreEqual(1, stm.Read(rgb, 0, 1));
Assert.AreEqual(5, stm.Seek(0, SeekOrigin.Current));
Assert.AreEqual(Encoding.UTF8.GetBytes("4"), rgb);
Assert.AreEqual(3, stm.Seek(-2, SeekOrigin.Current));
Assert.AreEqual(1, stm.Read(rgb, 0, 1));
Assert.AreEqual(4, stm.Seek(0, SeekOrigin.Current));
Assert.AreEqual(Encoding.UTF8.GetBytes("3"), rgb);
}
public static void TestStreamSetLengthBeyondInitialAllocatedBuffer_WriteBeyondInitialAllocatedBuffer()
{
DebugStream stm = new DebugStream();
byte[] rgbWrite = Encoding.UTF8.GetBytes("0123456789");
// write at the very end (but not over)
stm.Position = 2048;
Assert.AreEqual(0, stm.Length);
Assert.AreEqual(1024, stm.m_cbStream);
Assert.AreEqual(2048, stm.Position);
stm.Write(rgbWrite, 0, 10);
Assert.LessOrEqual(1024 + 4096, stm.m_cbStream);
Assert.AreEqual(2058, stm.Length);
Assert.AreEqual(2058, stm.Position);
stm.Position = 2048;
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
}
// check length and position (position will be in the truncated space. without a write, this leaves thile file trunaceted)
public static void TestStreamWrite_SetLengthTruncate()
{
DebugStream stm = StmInit("0123456789");
stm.SetLength(5);
Assert.AreEqual(10, stm.Position);
Assert.AreEqual(5, stm.Length);
byte[] rgbExpected = Encoding.UTF8.GetBytes("01234");
byte[] rgbRead = new byte[5];
// try to read from beyond the end
Assert.AreEqual(0, stm.Read(rgbRead, 0, 5));
//now reposition and read
stm.Position = 0;
Assert.AreEqual(5, stm.Read(rgbRead, 0, 5));
Assert.AreEqual(rgbExpected, rgbRead);
}
public static void TestStreamReadBasicRead()
{
DebugStream stm = StmInit("test");
stm.Seek(0, SeekOrigin.Begin);
byte[] rgb = new byte[4];
Assert.AreEqual(4, stm.Read(rgb, 0, 4));
Assert.AreEqual(Encoding.UTF8.GetBytes("test"), rgb);
}
public static void TestStmCreateFromString(string sIn, byte[] rgbExpected)
{
DebugStream stm = StmCreateFromString(sIn);
stm.Seek(0, SeekOrigin.Begin);
Assert.AreEqual(rgbExpected.Length, stm.Length);
byte[] rgbRead = new byte[rgbExpected.Length];
stm.Read(rgbRead, 0, rgbExpected.Length);
Assert.AreEqual(rgbExpected, rgbRead);
}
public static void TestStreamWrite_SetLengthNoChangeFile() // check length and position
{
DebugStream stm = StmInit("0123456789");
stm.SetLength(10);
Assert.AreEqual(10, stm.Length);
byte[] rgbExpected = Encoding.UTF8.GetBytes("0123456789");
byte[] rgbRead = new byte[10];
stm.Position = 0;
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbExpected, rgbRead);
}
TestStreamWriteBeyondInitialAllocatedBuffer() // check that we reallocated teh buffer and retained its contents correctly
{
DebugStream stm = new DebugStream();
stm.Position = 1020;
Assert.AreEqual(1024, stm.m_cbStream);
byte[] rgbWrite = Encoding.UTF8.GetBytes("0123456789");
stm.Write(rgbWrite, 0, 10);
Assert.LessOrEqual(1024 + 4096, stm.m_cbStream);
stm.Position = 1020;
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbWrite, rgbRead);
}
public static void TestStreamWrite_SeekBack_WriteNoGrowFile()
{
DebugStream stm = StmInit("0123456789");
stm.Seek(-4, SeekOrigin.Current);
byte[] rgbWrite = new byte[2] {
65, 66
};
stm.Write(rgbWrite, 0, 2);
Assert.AreEqual(8, stm.Position);
Assert.AreEqual(10, stm.Length);
stm.Position = 0;
byte[] rgbExpected = Encoding.UTF8.GetBytes("012345AB89");
byte[] rgbRead = new byte[10];
Assert.AreEqual(10, stm.Read(rgbRead, 0, 10));
Assert.AreEqual(rgbExpected, rgbRead);
}
public static void TestStreamWrite_SeekBack_WriteGrowFile() // check that length and position are correct
{
DebugStream stm = StmInit("0123456789");
stm.Seek(-2, SeekOrigin.Current);
byte[] rgbWrite = new byte[3] {
65, 66, 67
};
stm.Write(rgbWrite, 0, 3);
Assert.AreEqual(11, stm.Position);
Assert.AreEqual(11, stm.Length);
stm.Position = 0;
byte[] rgbExpected = Encoding.UTF8.GetBytes("01234567ABC");
byte[] rgbRead = new byte[11];
Assert.AreEqual(11, stm.Read(rgbRead, 0, 11));
Assert.AreEqual(rgbExpected, rgbRead);
}
public static void TestStreamSetLength_SeekIntoSpace_WriteIntoSpaceGrow()
{
DebugStream stm = new DebugStream();
stm.SetLength(20);
stm.Position = 18;
Assert.AreEqual(18, stm.Position);
Assert.AreEqual(20, stm.Length);
byte[] rgbWrite = new byte[6] {
65, 66, 67, 68, 69, 70
};
stm.Write(rgbWrite, 0, 6);
Assert.AreEqual(24, stm.Position);
Assert.AreEqual(24, stm.Length);
stm.Position = 18;
byte[] rgbRead = new byte[6];
Assert.AreEqual(6, stm.Read(rgbRead, 0, 6));
Assert.AreEqual(rgbWrite, rgbRead);
}
public static void TestStreamSetLength_SeekIntoSpace_WriteIntoSpaceNoGrow()
{
DebugStream stm = new DebugStream();
stm.SetLength(20);
stm.Position = 10;
Assert.AreEqual(10, stm.Position);
Assert.AreEqual(20, stm.Length);
byte[] rgbWrite = new byte[2] {
65, 66
};
stm.Write(rgbWrite, 0, 2);
Assert.AreEqual(12, stm.Position);
Assert.AreEqual(20, stm.Length);
stm.Position = 10;
byte[] rgbRead = new byte[2];
Assert.AreEqual(2, stm.Read(rgbRead, 0, 2));
Assert.AreEqual(rgbWrite, rgbRead);
}
public static void TestStreamSeekBeyondEnd_Write()
{
DebugStream stm = new DebugStream();
stm.Position = 2;
Assert.AreEqual(2, stm.Position);
Assert.AreEqual(0, stm.Length);
byte[] rgbWrite = new byte[6] {
65, 66, 67, 68, 69, 70
};
stm.Write(rgbWrite, 0, 6);
Assert.AreEqual(8, stm.Position);
Assert.AreEqual(8, stm.Length);
stm.Position = 0;
byte[] rgbRead = new byte[8];
Assert.AreEqual(8, stm.Read(rgbRead, 0, 8));
byte[] rgbExpected = { 0, 0, 65, 66, 67, 68, 69, 70 };
Assert.AreEqual(rgbExpected, rgbRead);
}
public static void TestStreamWrite_SetLengthTruncate_Write()
{
DebugStream stm = StmInit("0123456789");
stm.SetLength(5);
Assert.AreEqual(10, stm.Position);
Assert.AreEqual(5, stm.Length);
byte[] rgbWrite = new byte[2] {
65, 66
};
stm.Write(rgbWrite, 0, 2);
Assert.AreEqual(12, stm.Position);
Assert.AreEqual(12, stm.Length);
stm.Position = 0;
byte[] rgbRead = new byte[12];
Assert.AreEqual(12, stm.Read(rgbRead, 0, 12));
byte[] rgbExpected = new byte[] { 48, 49, 50, 51, 52, 0, 0, 0, 0, 0, 65, 66 };
Assert.AreEqual(rgbExpected, rgbRead);
}
