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package stats_test
import (
"fmt"
"math"
"testing"
"github.com/montanaflynn/stats"
)
func ExampleRound() {
rounded, _ := stats.Round(1.534424, 1)
fmt.Println(rounded)
// Output: 1.5
}
func TestRound(t *testing.T) {
for _, c := range []struct {
number float64
decimals int
result float64
}{
{0.1111, 1, 0.1},
{-0.1111, 2, -0.11},
{5.3253, 3, 5.325},
{5.3258, 3, 5.326},
{5.3253, 0, 5.0},
{5.55, 1, 5.6},
} {
m, err := stats.Round(c.number, c.decimals)
if err != nil {
t.Errorf("Returned an error")
}
if m != c.result {
t.Errorf("%.1f != %.1f", m, c.result)
}
}
_, err := stats.Round(math.NaN(), 2)
if err == nil {
t.Errorf("Round should error on NaN")
}
}
func BenchmarkRound(b *testing.B) {
for i := 0; i < b.N; i++ {
_, _ = stats.Round(0.1111, 1)
}
}
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