test fixes

chart.go

@@ -178,6 +178,7 @@ func (c Chart) getRanges() (xrange, yrange, yrangeAlt Range) {
 					} else if seriesAxis == YAxisSecondary {
 						minya = math.Min(minya, vy)
 						maxya = math.Max(maxya, vy)
+						hasSecondaryAxis = true
 					}
 				}
 			}

value_formatter_test.go

@@ -11,7 +11,7 @@ func TestTimeValueFormatterWithFormat(t *testing.T) {
 	assert := assert.New(t)
 
 	d := time.Now()
-	di := d.Unix()
+	di := TimeToFloat64(d)
 	df := float64(di)
 
 	s := TimeValueFormatterWithFormat(d, DefaultDateFormat)