Merge pull request piquette#11 from jacks821/historicquote

Adds a historical quote function to Quote

Author: ackleymi

quote/client.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"strings"
 
+	chart "github.com/piquette/finance-go/chart"
 	finance "github.com/piquette/finance-go"
 	"github.com/piquette/finance-go/form"
 	"github.com/piquette/finance-go/iter"
+	"github.com/piquette/finance-go/datetime"
 )
 
 // Client is used to invoke quote APIs.
@@ -40,6 +42,22 @@ func (i *Iter) Quote() *finance.Quote {
 	return i.Current().(*finance.Quote)
 }
 
+//Gives the Day's Close when you input a historical date
+func GetHistoricalQuote(symbol string, month int, day int, year int) (*finance.ChartBar, error) {
+	p := &chart.Params{
+		Symbol:   symbol,
+		Start:    &datetime.Datetime{Month: month, Day: day, Year: year},
+		End:      &datetime.Datetime{Month: month, Day: day, Year: year},
+		Interval: datetime.OneDay,
+	  }
+	iter := chart.Get(p)
+	for iter.Next() {
+		b := iter.Bar()
+		return b, nil
+	}
+	return nil, iter.Err()
+}
+
 // Get returns an Quote quote that matches the parameters specified.
 func Get(symbol string) (*finance.Quote, error) {
 	i := List([]string{symbol})

quote/client_test.go

@@ -19,6 +19,31 @@ func TestGetRegularMarketQuote(t *testing.T) {
 	assert.Equal(t, tests.TestEquitySymbol, q.Symbol)
 }
 
+func TestHistoricalQuote(t *testing.T) {
+	TestMonth := 1
+	TestDay := 11
+	TestYear := 2018
+	
+	q, err := GetHistoricalQuote(tests.TestEquitySymbol, TestMonth, TestDay, TestYear)
+	
+	assert.Nil(t, err)
+	assert.NotNil(t, q)
+	high, _ := q.High.Float64()
+	low, _ := q.Low.Float64()
+	open, _ := q.Open.Float64()
+	close, _ := q.Open.Float64()
+	assert.Equal(t, 188.13999938964844, high)
+	assert.Equal(t, 187.5500030517578, low)
+	assert.Equal(t, 187.75, close)
+	assert.Equal(t, 187.75, open)
+}
+
+func TestBadSymbolBar(t *testing.T) {
+	chart, err := GetHistoricalQuote("BADSYMBOL", 1, 11, 2018)
+	assert.Nil(t, chart)
+	assert.NotNil(t, err)
+}
+
 func TestGetPostMarketQuote(t *testing.T) {
 	tests.SetMarket(finance.MarketStatePost)
 

testing/testing.go

@@ -33,6 +33,9 @@ const (
 	TestForexPairSymbol  = "USDGBP=X"
 	TestCryptoPairSymbol = "BTC-USD"
 	TestStraddleSymbol   = "AMD"
+	TestMonth 			 = 1
+	TestDay              = 11
+	TestYear             = 2018
 )
 
 func init() {

yfin.go

@@ -249,6 +249,16 @@ type ChartBar struct {
 	Timestamp int
 }
 
+type OHLCHistoric struct {
+	Open		float64
+	Low			float64
+	High		float64
+	Close		float64
+	AdjClose	float64
+	Volume		int
+	Timestamp 	int
+}
+
 // ChartMeta is meta data associated with a chart response.
 type ChartMeta struct {
 	Currency             string    `json:"currency"`