46 lines
928 B
Go
46 lines
928 B
Go
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package ostat
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import (
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"math"
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"testing"
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)
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func TestInsert(t *testing.T) {
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os := NewOnlineStat()
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v := []float64{4, 7, 13, 16}
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for _, i := range v {
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os.Push(i)
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}
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if os.Min != 4 {
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t.Errorf("incorrectly calculated min")
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}
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if os.Max != 16 {
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t.Errorf("incorrectly calculated max")
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}
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if m, _ := os.Mean(); m != 10.0 {
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t.Errorf("incorrect mean")
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}
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if variance, _ := os.Variance(); variance != 30.0 {
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t.Errorf("incorrect variance: %f", variance)
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}
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if stdev, _ := os.StdDev(); stdev != math.Sqrt(30.0) {
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t.Errorf("incorrect stdev: %f", stdev)
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}
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}
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func TestEmpty(t *testing.T) {
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os := NewOnlineStat()
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_, err := os.Mean()
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if err == nil {
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t.Errorf("failure to notify the running stat was empty")
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}
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_, err = os.Variance()
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if err == nil {
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t.Errorf("failure to notify the running stat was empty")
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}
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_, err = os.StdDev()
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if err == nil {
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t.Errorf("failure to notify the running stat was empty")
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}
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}
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