macd works with test.

macd_series_test.go

@@ -1,19 +1,75 @@
 package chart
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/blendlabs/go-assert"
 )
 
+var (
+	macdExpected = []float64{
+		0,
+		-0.06381766382,
+		-0.1641441222,
+		-0.2817201894,
+		-0.4033023481,
+		-0.3924673744,
+		-0.2983093823,
+		-0.1561821464,
+		0.008916708129,
+		0.05210332292,
+		0.01649503993,
+		-0.06667130899,
+		-0.1751344574,
+		-0.1657328378,
+		-0.08257097469,
+		0.04265109369,
+		0.1875741257,
+		0.2091853882,
+		0.1518975486,
+		0.04781419838,
+		-0.08025242841,
+		-0.08881960494,
+		-0.02183529775,
+		0.08904155476,
+		0.2214141128,
+		0.2321805992,
+		0.1656331722,
+		0.05373789678,
+		-0.08083727586,
+		-0.09475354363,
+		-0.03209767112,
+		0.07534076818,
+		0.2050442354,
+		0.2138010557,
+		0.1458045181,
+		0.03293263556,
+		-0.1022243734,
+		-0.1163957964,
+		-0.05372761902,
+		0.05393941791,
+		0.1840438454,
+		0.1933365048,
+		0.1259788988,
+		0.01382225715,
+		-0.1205656194,
+		-0.1339326478,
+		-0.07044017167,
+		0.03805851969,
+		0.1689918111,
+		0.1791024416,
+	}
+)
+
 func TestMACDSeries(t *testing.T) {
 	assert := assert.New(t)
 
 	mockSeries := mockValueProvider{
-		Seq(1.0, 100.0),
-		SeqRand(100.0, 256),
+		emaXValues,
+		emaYValues,
 	}
-	assert.Equal(100, mockSeries.Len())
+	assert.Equal(50, mockSeries.Len())
 
 	mas := &MACDSeries{
 		InnerSeries: mockSeries,
@@ -26,4 +82,8 @@ func TestMACDSeries(t *testing.T) {
 	}
 
 	assert.NotEmpty(yvalues)
+	for index, vy := range yvalues {
+		fmt.Printf("delta @ %d actual: %0.9f expected: %0.9f\n", index, vy, macdExpected[index])
+		assert.InDelta(vy, macdExpected[index], emaDelta, fmt.Sprintf("delta @ %d actual: %0.9f expected: %0.9f", index, vy, macdExpected[index]))
+	}
 }