public void Add_AddsCorrectValues()
{
var metrics = new ScopeMetrics("Test");
metrics.Add(500);
metrics.Add(500);
metrics.TotalNanoseconds.Should().Be(1000);
metrics.Count.Should().Be(2);
}
public void Add_ValueIsNegative_ThrowsException()
{
var metrics = new ScopeMetrics("Test");
Action act = () => metrics.Add(-1);
var exception = act.Should().Throw <ArgumentOutOfRangeException>();
exception.Which.ParamName.Should().Be("elapsedNs");
exception.Which.ActualValue.Should().Be(-1);
}