AssertCirconusNormalHistogram ensures the Circonus Histogram data captured in the result slice abides a normal distribution.

AssertExpvarNormalHistogram ensures the expvar Histogram referenced by metricName abides a normal distribution.

AssertGraphiteNormalHistogram ensures the expvar Histogram referenced by metricName abides a normal distribution.

AssertPrometheusBucketedHistogram ensures the Prometheus Histogram referenced by name has observations in the expected quantity and bucket.

AssertPrometheusNormalSummary ensures the Prometheus Summary referenced by name abides a normal distribution.

PopulateNormalHistogram populates the Histogram with a normal distribution of observations.

ScrapePrometheus returns the text encoding of the current state of Prometheus.