private void TestStreamReadByDynamicSpeed(ThrottledStreamRead readMethod)
{
// arrange
var limitationCoefficient = 0.9; // 90%
var size = 10240; // 10KB
var maxBytesPerSecond = 1024; // 1 KByte/s
var expectedTime = (size / 2 / maxBytesPerSecond + size / 2 / (maxBytesPerSecond * 2)) * 1000 * limitationCoefficient; // 90% of 10000 Milliseconds
var randomBytes = DummyData.GenerateRandomBytes(size);
var buffer = new byte[maxBytesPerSecond / 8];
var readSize = 1;
var totalReadSize = 0L;
using ThrottledStream stream = new ThrottledStream(new MemoryStream(randomBytes), maxBytesPerSecond);
var stopWatcher = Stopwatch.StartNew();
// act
stream.Seek(0, SeekOrigin.Begin);
while (readSize > 0)
{
readSize = readMethod(stream, buffer, 0, buffer.Length);
totalReadSize += readSize;
// increase speed (2X) after downloading half size
if (totalReadSize > size / 2 && maxBytesPerSecond == stream.BandwidthLimit)
{
stream.BandwidthLimit *= 2;
}
}
stopWatcher.Stop();
// assert
Assert.IsTrue(stopWatcher.ElapsedMilliseconds >= expectedTime,
$"expected duration is: {expectedTime}ms , but actual duration is: {stopWatcher.ElapsedMilliseconds}ms");
}
private void TestStreamReadSpeed(ThrottledStreamRead readMethod)
{
// arrange
var limitationCoefficient = 0.8; // 80%
var size = 10240; // 10KB
var maxBytesPerSecond = 1024; // 1024 Byte/s
var expectedTime = (size / maxBytesPerSecond) * 1000 * limitationCoefficient; // 80% of 10000 Milliseconds
var randomBytes = DummyData.GenerateRandomBytes(size);
var buffer = new byte[maxBytesPerSecond / 8];
var readSize = 1;
using Stream stream = new ThrottledStream(new MemoryStream(randomBytes), maxBytesPerSecond);
var stopWatcher = Stopwatch.StartNew();
// act
stream.Seek(0, SeekOrigin.Begin);
while (readSize > 0)
{
readSize = readMethod(stream, buffer, 0, buffer.Length);
}
stopWatcher.Stop();
// assert
Assert.IsTrue(stopWatcher.ElapsedMilliseconds >= expectedTime,
$"expected duration is: {expectedTime}ms , but actual duration is: {stopWatcher.ElapsedMilliseconds}ms");
}
private void TestStreamReadSpeed(ThrottledStreamRead readMethod)
{
// arrange
var size = 1024;
var maxBytesPerSecond = 256; // 256 Byte/s
var slowExpectedTime = (size / maxBytesPerSecond) * 1000; // 4000 Milliseconds
var fastExpectedTime = slowExpectedTime * 0.75; // 3000 Milliseconds
var randomBytes = DummyData.GenerateRandomBytes(size);
var buffer = new byte[maxBytesPerSecond / 8];
var readSize = 1;
using Stream stream = new ThrottledStream(new MemoryStream(randomBytes), maxBytesPerSecond);
var stopWatcher = Stopwatch.StartNew();
// act
stream.Seek(0, SeekOrigin.Begin);
while (readSize > 0)
{
readSize = readMethod(stream, buffer, 0, buffer.Length);
}
stopWatcher.Stop();
// assert
Assert.IsTrue(stopWatcher.ElapsedMilliseconds >= fastExpectedTime, $"actual duration is: {stopWatcher.ElapsedMilliseconds}ms");
Assert.IsTrue(stopWatcher.ElapsedMilliseconds <= slowExpectedTime, $"actual duration is: {stopWatcher.ElapsedMilliseconds}ms");
}