public void SubSamples()
{
var series = new Series {
Name = "name"
};
var reference = DateTime.UtcNow.Date;
series.AddPoint(reference, 1m);
series.AddPoint(reference.AddDays(1), 2m);
series.AddPoint(reference.AddDays(2), 3m);
series.AddPoint(reference.AddDays(3), 4m);
series.AddPoint(reference.AddDays(4), 5m);
var sampler = new SeriesSampler(TimeSpan.FromDays(1));
var sampled = sampler.Sample(series, reference.AddDays(1), reference.AddDays(2));
Assert.AreEqual(2, sampled.Values.Count);
Assert.AreEqual(series.Values[1].x, sampled.Values[0].x);
Assert.AreEqual(series.Values[1].y, sampled.Values[0].y);
Assert.AreEqual(series.Values[2].x, sampled.Values[1].x);
Assert.AreEqual(series.Values[2].y, sampled.Values[1].y);
}
public void ReturnsIdentityOnSinglePoint()
{
var series = new Series {Name = "name"};
var reference = DateTime.Now.ToUniversalTime();
series.AddPoint(reference, 1m);
var sampler = new SeriesSampler(TimeSpan.FromDays(1));
var sampled = sampler.Sample(series, reference.AddSeconds(-1), reference.AddSeconds(1));
Assert.AreEqual(1, sampled.Values.Count);
Assert.AreEqual(series.Values[0].x, sampled.Values[0].x);
Assert.AreEqual(series.Values[0].y, sampled.Values[0].y);
}
public void EmitsEmptySeriesWithSinglePointOutsideOfStartStop()
{
var series = new Series {
Name = "name"
};
var reference = DateTime.Now;
series.AddPoint(reference.AddSeconds(-1), 1m);
var sampler = new SeriesSampler(TimeSpan.FromDays(1));
var sampled = sampler.Sample(series, reference, reference);
Assert.AreEqual(0, sampled.Values.Count);
}
public void DoesNotSampleScatterPlots()
{
var scatter = new Series("scatter", SeriesType.Scatter);
scatter.AddPoint(DateTime.Today, 1m);
scatter.AddPoint(DateTime.Today, 3m);
scatter.AddPoint(DateTime.Today.AddSeconds(1), 1.5m);
scatter.AddPoint(DateTime.Today.AddSeconds(0.5), 1.5m);
var sampler = new SeriesSampler(TimeSpan.FromMilliseconds(1));
var sampled = sampler.Sample(scatter, DateTime.Today, DateTime.Today.AddDays(1));
foreach (var pair in scatter.Values.Zip<ChartPoint, ChartPoint, Tuple<ChartPoint, ChartPoint>>(sampled.Values, Tuple.Create))
{
Assert.AreEqual(pair.Item1.x, pair.Item2.x);
Assert.AreEqual(pair.Item1.y, pair.Item2.y);
}
}
public void ReturnsIdentityOnSinglePoint()
{
var series = new Series {
Name = "name"
};
var reference = DateTime.Now.ToUniversalTime();
series.AddPoint(reference, 1m);
var sampler = new SeriesSampler(TimeSpan.FromDays(1));
var sampled = sampler.Sample(series, reference.AddSeconds(-1), reference.AddSeconds(1));
Assert.AreEqual(1, sampled.Values.Count);
Assert.AreEqual(series.Values[0].x, sampled.Values[0].x);
Assert.AreEqual(series.Values[0].y, sampled.Values[0].y);
}
public void DoesNotSampleScatterPlots()
{
var scatter = new Series("scatter", SeriesType.Scatter);
scatter.AddPoint(DateTime.Today, 1m);
scatter.AddPoint(DateTime.Today, 3m);
scatter.AddPoint(DateTime.Today.AddSeconds(1), 1.5m);
scatter.AddPoint(DateTime.Today.AddSeconds(0.5), 1.5m);
var sampler = new SeriesSampler(TimeSpan.FromMilliseconds(1));
var sampled = sampler.Sample(scatter, DateTime.Today, DateTime.Today.AddDays(1));
foreach (var pair in scatter.Values.Zip(sampled.Values, Tuple.Create))
{
Assert.AreEqual(pair.Item1.x, pair.Item2.x);
Assert.AreEqual(pair.Item1.y, pair.Item2.y);
}
}
public void HandlesDuplicateTimes()
{
var series = new Series();
series.Values.Add(new ChartPoint(DateTime.Today, 1m));
series.Values.Add(new ChartPoint(DateTime.Today, 2m));
series.Values.Add(new ChartPoint(DateTime.Today.AddDays(1), 3m));
var sampler = new SeriesSampler(TimeSpan.FromDays(1));
var sampled = sampler.Sample(series, DateTime.Today, DateTime.Today.AddDays(1));
// sampler will only produce one value at the time
// it was also respect the latest value
Assert.AreEqual(2, sampled.Values.Count);
foreach (var pair in series.Values.Skip(1).Zip(sampled.Values, Tuple.Create))
{
Assert.AreEqual(pair.Item1.x, pair.Item2.x);
Assert.AreEqual(pair.Item1.y, pair.Item2.y);
}
}
public void SubSamples()
{
var series = new Series {Name = "name"};
var reference = DateTime.UtcNow.Date;
series.AddPoint(reference, 1m);
series.AddPoint(reference.AddDays(1), 2m);
series.AddPoint(reference.AddDays(2), 3m);
series.AddPoint(reference.AddDays(3), 4m);
series.AddPoint(reference.AddDays(4), 5m);
var sampler = new SeriesSampler(TimeSpan.FromDays(1));
var sampled = sampler.Sample(series, reference.AddDays(1), reference.AddDays(2));
Assert.AreEqual(2, sampled.Values.Count);
Assert.AreEqual(series.Values[1].x, sampled.Values[0].x);
Assert.AreEqual(series.Values[1].y, sampled.Values[0].y);
Assert.AreEqual(series.Values[2].x, sampled.Values[1].x);
Assert.AreEqual(series.Values[2].y, sampled.Values[1].y);
}
public void EmitsEmptySeriesWithSinglePointOutsideOfStartStop()
{
var series = new Series { Name = "name" };
var reference = DateTime.Now;
series.AddPoint(reference.AddSeconds(-1), 1m);
var sampler = new SeriesSampler(TimeSpan.FromDays(1));
var sampled = sampler.Sample(series, reference, reference);
Assert.AreEqual(0, sampled.Values.Count);
}
public void HandlesDuplicateTimes()
{
var series = new Series();
series.Values.Add(new ChartPoint(DateTime.Today, 1m));
series.Values.Add(new ChartPoint(DateTime.Today, 2m));
series.Values.Add(new ChartPoint(DateTime.Today.AddDays(1), 3m));
var sampler = new SeriesSampler(TimeSpan.FromDays(1));
var sampled = sampler.Sample(series, DateTime.Today, DateTime.Today.AddDays(1));
// sampler will only produce one value at the time
// it was also respect the latest value
Assert.AreEqual(2, sampled.Values.Count);
foreach (var pair in series.Values.Skip(1).Zip<ChartPoint, ChartPoint, Tuple<ChartPoint, ChartPoint>>(sampled.Values, Tuple.Create))
{
Assert.AreEqual(pair.Item1.x, pair.Item2.x);
Assert.AreEqual(pair.Item1.y, pair.Item2.y);
}
}