updates + tests

first_value_annotation_test.go

@@ -0,0 +1,22 @@
+package chart
+
+import (
+	"testing"
+
+	"github.com/blend/go-sdk/assert"
+)
+
+func TestFirstValueAnnotation(t *testing.T) {
+	assert := assert.New(t)
+
+	series := ContinuousSeries{
+		XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
+		YValues: []float64{5.0, 3.0, 3.0, 2.0, 1.0},
+	}
+
+	fva := FirstValueAnnotation(series)
+	assert.NotEmpty(fva.Annotations)
+	fvaa := fva.Annotations[0]
+	assert.Equal(1, fvaa.XValue)
+	assert.Equal(5, fvaa.YValue)
+}