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package stats_test
import (
"reflect"
"testing"
"github.com/montanaflynn/stats"
)
func TestMode(t *testing.T) {
for _, c := range []struct {
in []float64
out []float64
}{
{[]float64{2, 2, 2, 2}, []float64{2}},
{[]float64{5, 3, 4, 2, 1}, []float64{}},
{[]float64{5, 5, 3, 3, 4, 4, 2, 2, 1, 1}, []float64{}},
{[]float64{5, 5, 3, 4, 2, 1}, []float64{5}},
{[]float64{5, 5, 3, 3, 4, 2, 1}, []float64{3, 5}},
{[]float64{1}, []float64{1}},
{[]float64{-50, -46.325, -46.325, -.87, 1, 2.1122, 3.20, 5, 15, 15, 15.0001}, []float64{-46.325, 15}},
{[]float64{1, 2, 3, 4, 4, 4, 4, 4, 5, 3, 6, 7, 5, 0, 8, 8, 7, 6, 9, 9}, []float64{4}},
{[]float64{76, 76, 110, 76, 76, 76, 76, 119, 76, 76, 76, 76, 31, 31, 31, 31, 83, 83, 83, 78, 78, 78, 78, 78, 78, 78, 78}, []float64{76}},
} {
got, err := stats.Mode(c.in)
if err != nil {
t.Errorf("Returned an error")
}
if !reflect.DeepEqual(c.out, got) {
t.Errorf("Mode(%.1f) => %.1f != %.1f", c.in, got, c.out)
}
}
_, err := stats.Mode([]float64{})
if err == nil {
t.Errorf("Empty slice should have returned an error")
}
}
func BenchmarkModeSmallFloatSlice(b *testing.B) {
for i := 0; i < b.N; i++ {
_, _ = stats.Mode(makeFloatSlice(5))
}
}
func BenchmarkModeSmallRandFloatSlice(b *testing.B) {
lf := makeRandFloatSlice(5)
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = stats.Mode(lf)
}
}
func BenchmarkModeLargeFloatSlice(b *testing.B) {
lf := makeFloatSlice(100000)
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = stats.Mode(lf)
}
}
func BenchmarkModeLargeRandFloatSlice(b *testing.B) {
lf := makeRandFloatSlice(100000)
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = stats.Mode(lf)
}
}
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