public void TestPerformActionAndSignal()
{
using (ManualResetEvent mre = new ManualResetEvent(false))
using (TestStream io = new TestStream())
using (BackgroundWriter wtr = new BackgroundWriter(io))
{
wtr.Perform(s => s.Write(new byte[100], 0, 100), mre);
Assert.IsTrue(mre.WaitOne(60000, false));
Assert.AreEqual(100, io.Position);
Assert.AreEqual(100, io.Length);
}
}
public void TestWriteFileAsyncFlush()
{
using (ManualResetEvent mre = new ManualResetEvent(false))
using (TempFile temp = new TempFile())
using (TestStream io = new TestStream(temp.Open()))
using (BackgroundWriter wtr = new BackgroundWriter(io))
{
const int sz = 1000;
const int iter = 10000;
var bytes = new byte[sz];
for (int i = 0; i < iter; i++)
wtr.Write(bytes, 0, sz);
wtr.BeginFlush();
Assert.IsFalse(io.Flushed);
wtr.Perform(s => mre.Set());
Assert.IsTrue(mre.WaitOne(60000, false));
Assert.IsTrue(io.Flushed);
Assert.AreEqual(sz * iter, io.Position);
Assert.AreEqual(sz * iter, io.Length);
}
}
public void TestPerformAction()
{
using (TestStream io = new TestStream())
using (BackgroundWriter wtr = new BackgroundWriter(io))
{
wtr.Perform(s => s.Write(new byte[100], 0, 100));
wtr.Flush();
Assert.AreEqual(100, io.Position);
Assert.AreEqual(100, io.Length);
}
}
public void TestWriteAndReadOffset()
{
using (TestStream io = new TestStream())
using (BackgroundWriter wtr = new BackgroundWriter(io))
{
wtr.Write(0L, new byte[100], 0, 100);
wtr.Perform(s => Thread.Sleep(50));
wtr.Write(100L, new byte[] { 99 }, 0, 1);
wtr.Write(100L, new byte[] { 42, 43 }, 0, 2);
// Read scans the pending writes for writes at the provided offset and returns the last result
byte[] read = new byte[100];
Assert.AreEqual(2, wtr.Read(100L, read, 0, 100));
Assert.AreEqual(42, (int)read[0]);
Assert.AreEqual(43, (int)read[1]);
}
}