forked from mirror/client_golang
75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
/*
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Copyright (c) 2012, Matt T. Proud
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All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file.
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*/
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package metrics
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import (
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"github.com/matttproud/golang_instrumentation/maths"
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. "launchpad.net/gocheck"
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)
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func (s *S) TestTallyingPercentileEstimatorMinimum(c *C) {
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c.Assert(Minimum(-2, -1, 0, 0), maths.IsNaN)
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c.Check(Minimum(-2, -1, 0, 1), Equals, -2.0)
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}
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func (s *S) TestTallyingPercentileEstimatorMaximum(c *C) {
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c.Assert(Maximum(-2, -1, 0, 0), maths.IsNaN)
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c.Check(Maximum(-2, -1, 0, 1), Equals, -1.0)
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}
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func (s *S) TestTallyingPercentilesEstimatorAverage(c *C) {
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c.Assert(Average(-2, -1, 0, 0), maths.IsNaN)
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c.Check(Average(-2, -2, 0, 1), Equals, -2.0)
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c.Check(Average(-1, -1, 0, 1), Equals, -1.0)
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c.Check(Average(1, 1, 0, 2), Equals, 1.0)
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c.Check(Average(2, 1, 0, 2), Equals, 1.5)
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}
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func (s *S) TestTallyingPercentilesEstimatorUniform(c *C) {
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c.Assert(Uniform(-5, 5, 0, 0), maths.IsNaN)
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c.Check(Uniform(-5, 5, 0, 2), Equals, -5.0)
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c.Check(Uniform(-5, 5, 1, 2), Equals, 0.0)
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c.Check(Uniform(-5, 5, 2, 2), Equals, 5.0)
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}
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func (s *S) TestTallyingBucketBuilder(c *C) {
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var bucket Bucket = TallyingBucketBuilder()
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c.Assert(bucket, Not(IsNil))
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}
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func (s *S) TestTallyingBucketString(c *C) {
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bucket := TallyingBucket{
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observations: 3,
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smallestObserved: 2.0,
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largestObserved: 5.5,
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}
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c.Check(bucket.String(), Equals, "[TallyingBucket (2.000000, 5.500000); 3 items]")
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}
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func (s *S) TestTallyingBucketAdd(c *C) {
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b := DefaultTallyingBucket()
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b.Add(1)
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c.Check(b.observations, Equals, 1)
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c.Check(b.Observations(), Equals, 1)
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c.Check(b.smallestObserved, Equals, 1.0)
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c.Check(b.largestObserved, Equals, 1.0)
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b.Add(2)
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c.Check(b.observations, Equals, 2)
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c.Check(b.Observations(), Equals, 2)
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c.Check(b.smallestObserved, Equals, 1.0)
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c.Check(b.largestObserved, Equals, 2.0)
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}
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