go-chart/range_test.go
2016-07-11 23:32:31 -07:00

23 lines
456 B
Go

package chart
import (
"testing"
"github.com/blendlabs/go-assert"
)
func TestRangeTranslate(t *testing.T) {
assert := assert.New(t)
values := []float64{1.0, 2.0, 2.5, 2.7, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0}
r := Range{Domain: 1000}
r.Min, r.Max = MinAndMax(values...)
// delta = ~7.0
// value = ~5.0
// domain = ~1000
// 5/8 * 1000 ~=
assert.Equal(0, r.Translate(1.0))
assert.Equal(1000, r.Translate(8.0))
assert.Equal(572, r.Translate(5.0))
}