public void TestReadFully()
{
const string READFULLY_TEST_FILE = "ReadFully.txt";
int fileLength;
Stream @in;
// Read one time to measure the length of the file (it may be different
// on different operating systems because of line endings)
using (@in = GetType().getResourceAsStream(READFULLY_TEST_FILE))
{
using (var ms = new MemoryStream())
{
@in.CopyTo(ms);
fileLength = ms.ToArray().Length;
}
}
// Declare the buffer one byte too large
byte[] buffer = new byte[fileLength + 1];
@in = GetType().getResourceAsStream(READFULLY_TEST_FILE);
DataInputStream dis;
using (dis = new DataInputStream(@in))
{
// Read once for real (to the exact length)
dis.ReadFully(buffer, 0, fileLength);
}
// Read past the end of the stream
@in = GetType().getResourceAsStream(READFULLY_TEST_FILE);
dis = new DataInputStream(@in);
bool caughtException = false;
try
{
// Using the buffer length (that is 1 byte too many)
// should generate EndOfStreamException.
dis.ReadFully(buffer, 0, buffer.Length);
}
#pragma warning disable 168
catch (EndOfStreamException ie)
#pragma warning restore 168
{
caughtException = true;
}
finally
{
dis.Dispose();
if (!caughtException)
{
fail("Test failed");
}
}
// Ensure we get an IndexOutOfRangeException exception when length is negative
@in = GetType().getResourceAsStream(READFULLY_TEST_FILE);
dis = new DataInputStream(@in);
caughtException = false;
try
{
dis.ReadFully(buffer, 0, -20);
}
#pragma warning disable 168
catch (IndexOutOfRangeException ie)
#pragma warning restore 168
{
caughtException = true;
}
finally
{
dis.Dispose();
if (!caughtException)
{
fail("Test failed");
}
}
}