diff --git a/range_test.go b/range_test.go
index 75b34a8..5cbb884 100644
--- a/range_test.go
+++ b/range_test.go
@@ -10,11 +10,9 @@ import (
 func TestRangeTranslate(t *testing.T) {
 	assert := assert.New(t)
 	values := []float64{1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0}
-	r := NewRange(1000, values...)
-	assert.Equal(1.0, r.MinValue)
-	assert.Equal(8.0, r.MaxValue)
-	assert.Equal(7.0, r.MinMaxDelta)
-	assert.Equal(1000, r.Domain)
+	r := NewRangeOfFloat64(1000, values...)
+	assert.Equal(1.0, r.GetMin())
+	assert.Equal(8.0, r.GetMax())
 	assert.Equal(428, r.Translate(5.0))
 }
 
@@ -31,9 +29,7 @@ func TestRangeOfTimeTranslate(t *testing.T) {
 		time.Now().AddDate(0, 0, -8),
 	}
 	r := NewRangeOfTime(1000, values...)
-	assert.Equal(values[7], r.MinValue)
-	assert.Equal(values[0], r.MaxValue)
-	assert.Equal(values[0].Unix()-values[7].Unix(), r.MinMaxDelta)
-	assert.Equal(1000, r.Domain)
+	assert.Equal(values[7], r.GetMin())
+	assert.Equal(values[0], r.GetMax())
 	assert.Equal(571, r.Translate(time.Now().AddDate(0, 0, -5)))
 }