forked from codahale/tinystat
/
tinystat_test.go
99 lines (75 loc) · 2.47 KB
/
tinystat_test.go
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package tinystat_test
import (
"testing"
"github.com/codahale/tinystat"
)
func TestSummarizeOdd(t *testing.T) {
s := tinystat.Summarize([]float64{1, 2, 3})
if v, want := s.N, 3.0; v != want {
t.Errorf("N was %v, but expected %v", v, want)
}
if v, want := s.Mean, 2.0; v != want {
t.Errorf("Mean was %v, but expected %v", v, want)
}
if v, want := s.Variance, 1.0; v != want {
t.Errorf("Variance was %v, but expected %v", v, want)
}
}
func TestSummarizeEven(t *testing.T) {
s := tinystat.Summarize([]float64{1, 2, 3, 4})
if v, want := s.N, 4.0; v != want {
t.Errorf("N was %v, but expected %v", v, want)
}
if v, want := s.Mean, 2.5; v != want {
t.Errorf("Mean was %v, but expected %v", v, want)
}
if v, want := s.Variance, 1.6666666666666667; v != want {
t.Errorf("Variance was %v, but expected %v", v, want)
}
}
func TestCompareSimilarData(t *testing.T) {
a := tinystat.Summarize([]float64{1, 2, 3, 4})
b := tinystat.Summarize([]float64{1, 2, 3, 4})
d := tinystat.Compare(a, b, 80)
if v, want := d.Delta, 0.0; v != want {
t.Errorf("Delta was %v, but expected %v", v, want)
}
if v, want := d.Error, 1.314311166777796; v != want {
t.Errorf("Error was %v, but expected %v", v, want)
}
if v, want := d.RelDelta, 0.0; v != want {
t.Errorf("RelDelta was %v, but expected %v", v, want)
}
if v, want := d.RelError, 0.5257244667111184; v != want {
t.Errorf("RelError was %v, but expected %v", v, want)
}
if v, want := d.StdDev, 1.2909944487358056; v != want {
t.Errorf("StdDev was %v, but expected %v", v, want)
}
if v, want := d.Significant(), false; v != want {
t.Errorf("Significance was %v, but expected %v", v, want)
}
}
func TestCompareDifferentData(t *testing.T) {
a := tinystat.Summarize([]float64{1, 2, 3, 4})
b := tinystat.Summarize([]float64{10, 20, 30, 40})
d := tinystat.Compare(a, b, 80)
if v, want := d.Delta, 22.5; v != want {
t.Errorf("Delta was %v, but expected %v", v, want)
}
if v, want := d.Error, 9.33993571056027; v != want {
t.Errorf("Error was %v, but expected %v", v, want)
}
if v, want := d.RelDelta, 9.0; v != want {
t.Errorf("RelDelta was %v, but expected %v", v, want)
}
if v, want := d.RelError, 3.7359742842241084; v != want {
t.Errorf("RelError was %v, but expected %v", v, want)
}
if v, want := d.StdDev, 9.17423929634859; v != want {
t.Errorf("StdDev was %v, but expected %v", v, want)
}
if v, want := d.Significant(), true; v != want {
t.Errorf("Significance was %v, but expected %v", v, want)
}
}