ExpectedObservationsLessThan returns the number of observations that should have a value less than or equal to the given value, given a normal distribution of observations described by Count, Mean, and Stdev.

FillCounter puts some deltas through the counter and returns the total value.

LastLine expects a regex whose first capture group can be parsed as a float64.

PopulateNormalHistogram makes a series of normal random observations into the histogram.

Quantiles expects a regex whose first capture group can be parsed as a float64.

SumLines expects a regex whose first capture group can be parsed as a float64.

TestCounter puts some deltas through the counter, and then calls the value func to check that the counter has the correct final value.

TestGauge puts some values through the gauge, and then calls the value func to check that the gauge has the correct final value.

TestHistogram puts some observations through the histogram, and then calls the quantiles func to checks that the histogram has computed the correct quantiles within some tolerance.

Count is the number of observations.

Mean is the center of the normal distribution of observations.

Stdev of the normal distribution of observations.