refactoring things a bit.

market_hours_range_test.go

@@ -0,0 +1,23 @@
+package chart
+
+import (
+	"testing"
+	"time"
+
+	assert "github.com/blendlabs/go-assert"
+	"github.com/wcharczuk/go-chart/date"
+)
+
+func TestMarketHoursRangeGetDelta(t *testing.T) {
+	assert := assert.New(t)
+
+	r := &MarketHoursRange{
+		Min:             time.Date(2016, 07, 19, 9, 30, 0, 0, date.Eastern()),
+		Max:             time.Date(2016, 07, 22, 16, 00, 0, 0, date.Eastern()),
+		MarketOpen:      date.NYSEOpen,
+		MarketClose:     date.NYSEClose,
+		HolidayProvider: date.IsNYSEHoliday,
+	}
+
+	assert.NotZero(r.GetDelta())
+}