/// <summary> /// Constructor /// </summary> /// <param name="ticks">The time from which to start calculating the bandwidth (e.g. DateTime.Now)</param> public StreamProgressCalculator(long ticks, int numWindows = 6, int millisecondsPerWindow = 300) { this.numWindows = numWindows; this.millisecondsPerWindow = millisecondsPerWindow; ticksPerWindow = TICKS_PER_MILLISECOND * millisecondsPerWindow; windowsPerSecond = 1000 / millisecondsPerWindow; bandwidthCalculator = new BandwidthCalculator(numWindows); Reset(ticks); }
public void ShouldThrowOnInvalidWindow() { var c = new BandwidthCalculator(3); Assert.That(() => c.Accumulate(-1, 100), Throws.Exception .TypeOf <ArgumentOutOfRangeException>() .With.Property("ParamName").EqualTo("window")); }
public void TestWithThreeMissingWindows() { var c = new BandwidthCalculator(3); c.Accumulate(107, 100); Assert.AreEqual(0, c.BytesPerWindow()); c.Accumulate(111, 100); Assert.AreEqual(0f, c.BytesPerWindow()); // 0 bytes in 3 windows (108-110) c.Clear(); c.Accumulate(107, 100); c.Accumulate(108, 200); c.Accumulate(112, 300); Assert.AreEqual(0f, c.BytesPerWindow()); // 0 bytes in 3 windows (109-111) }
public void OldDataShouldGoInCurrentWindow() { var c = new BandwidthCalculator(3); c.Accumulate(107, 100); c.Accumulate(108, 200); c.Accumulate(109, 300); Assert.AreEqual(300 / 2f, c.BytesPerWindow()); // 600 bytes in 2 windows (107-108) c.Accumulate(105, 400); // should be included in the 109 window Assert.AreEqual(300 / 2f, c.BytesPerWindow()); // still 600 bytes in 2 windows (107-108) c.Accumulate(110, 500); Assert.AreEqual(1000 / 3f, c.BytesPerWindow()); // 1000 bytes in 3 windows (107-109) }
public void TestWithIncrementingWindows() { var c = new BandwidthCalculator(3); c.Accumulate(43, 100); Assert.AreEqual(0, c.BytesPerWindow()); c.Accumulate(43, 200); Assert.AreEqual(0, c.BytesPerWindow()); c.Accumulate(44, 300); Assert.AreEqual(300f, c.BytesPerWindow()); // Average is calculated as the average of the latest 4 windows excluding the current one c.Accumulate(44, 400); Assert.AreEqual(300f, c.BytesPerWindow()); // Average is calculated as the average of the latest 4 windows excluding the current one c.Accumulate(45, 500); Assert.AreEqual(500f, c.BytesPerWindow()); // 1000 bytes total in 2 windows (43-44) c.Accumulate(46, 700); Assert.AreEqual(1500 / 3f, c.BytesPerWindow()); // 1500 bytes total in 3 windows (43-45) c.Accumulate(47, 800); Assert.AreEqual(1900 / 3f, c.BytesPerWindow()); // 1700 bytes total in 3 windows (44-46); window 43 has dropped off // Test that Clear() works c.Clear(); Assert.AreEqual(0, c.BytesPerWindow()); c.Accumulate(43, 100); Assert.AreEqual(0, c.BytesPerWindow()); c.Accumulate(43, 200); Assert.AreEqual(0, c.BytesPerWindow()); c.Accumulate(44, 300); Assert.AreEqual(300f, c.BytesPerWindow()); // Average is calculated as the average of the latest 4 windows excluding the current one c.Accumulate(44, 400); Assert.AreEqual(300f, c.BytesPerWindow()); // Average is calculated as the average of the latest 4 windows excluding the current one c.Accumulate(45, 500); Assert.AreEqual(500f, c.BytesPerWindow()); // 1000 bytes total in 2 windows (43-44) }
public void TestWithTwoMissingWindows() { var c = new BandwidthCalculator(3); c.Accumulate(107, 100); Assert.AreEqual(0, c.BytesPerWindow()); c.Accumulate(110, 100); Assert.AreEqual(100 / 3f, c.BytesPerWindow()); // 100 bytes in 3 windows (107-109) c.Clear(); c.Accumulate(107, 100); c.Accumulate(108, 200); c.Accumulate(111, 300); Assert.AreEqual(200 / 3f, c.BytesPerWindow()); // 200 bytes in 3 windows (108-110) c.Clear(); c.Accumulate(107, 100); c.Accumulate(108, 200); c.Accumulate(109, 300); c.Accumulate(112, 400); Assert.AreEqual(300 / 3f, c.BytesPerWindow()); // 300 bytes in 3 windows (109-111) }