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apidata_test.go
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apidata_test.go
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// This code is available on the terms of the project LICENSE.md file,
// also available online at https://blueoakcouncil.org/license/1.0.0.
package apidata
import (
"encoding/json"
"fmt"
"testing"
"time"
"decred.org/dcrdex/dex/encode"
"decred.org/dcrdex/dex/msgjson"
"decred.org/dcrdex/server/db"
"decred.org/dcrdex/server/matcher"
)
var dummyErr = fmt.Errorf("dummy error")
type TMarketSource struct {
base, quote uint32
}
func (m *TMarketSource) EpochDuration() uint64 { return 1000 }
func (m *TMarketSource) Base() uint32 { return m.base }
func (m *TMarketSource) Quote() uint32 { return m.quote }
type TDBSource struct {
loadEpochErr error
}
func (db *TDBSource) LoadEpochStats(base, quote uint32, caches []*db.CandleCache) error {
return db.loadEpochErr
}
type TBookSource struct {
book *msgjson.OrderBook
}
func (bs *TBookSource) Book(mktName string) (*msgjson.OrderBook, error) {
return bs.book, nil
}
type testRig struct {
db *TDBSource
api *DataAPI
}
func newTestRig() *testRig {
db := new(TDBSource)
return &testRig{
db: db,
api: NewDataAPI(db),
}
}
func TestAddMarketSource(t *testing.T) {
rig := newTestRig()
// initial success
err := rig.api.AddMarketSource(&TMarketSource{42, 0})
if err != nil {
t.Fatalf("AddMarketSource error: %v", err)
}
// unknown asset
err = rig.api.AddMarketSource(&TMarketSource{42, 54321})
if err == nil {
t.Fatalf("no error for unknown asset")
}
// DB error
rig.db.loadEpochErr = dummyErr
err = rig.api.AddMarketSource(&TMarketSource{42, 0})
if err == nil {
t.Fatalf("no error for DB error")
}
rig.db.loadEpochErr = nil
// success again
err = rig.api.AddMarketSource(&TMarketSource{42, 0})
if err != nil {
t.Fatalf("AddMarketSource error after: %v", err)
}
}
func TestReportEpoch(t *testing.T) {
rig := newTestRig()
mktSrc := &TMarketSource{42, 0}
err := rig.api.AddMarketSource(mktSrc)
if err != nil {
t.Fatalf("AddMarketSource error: %v", err)
}
epoch := encode.UnixMilliU(time.Now()) / mktSrc.EpochDuration()
epochsPerDay := uint64(time.Hour*24/time.Millisecond) / mktSrc.EpochDuration()
epochYesterday := epoch - epochsPerDay - 1
// initial success
stats := &matcher.MatchCycleStats{
MatchVolume: 123,
QuoteVolume: 2,
HighRate: 10,
LowRate: 1,
StartRate: 4,
EndRate: 5,
}
spot, err := rig.api.ReportEpoch(42, 0, epochYesterday, stats)
if err != nil {
t.Fatalf("ReportEpoch yesterday error: %v", err)
}
if spot.Vol24 != 0 {
t.Fatalf("wrong spot Vol24. wanted 0, got %d", spot.Vol24)
}
spot, err = rig.api.ReportEpoch(42, 0, epoch-1, stats)
if err != nil {
t.Fatalf("ReportEpoch last epoch error: %v", err)
}
if spot.Vol24 != 123 {
t.Fatalf("wrong spot Vol24. wanted 123, got %d", spot.Vol24)
}
stats.EndRate = 555
spot, err = rig.api.ReportEpoch(42, 0, epoch, stats)
if err != nil {
t.Fatalf("ReportEpoch error: %v", err)
}
if spot.Vol24 != 246 {
t.Fatalf("wrong spot Vol24. wanted 246, got %d", spot.Vol24)
}
if spot.Rate != 555 {
t.Fatalf("wrong spot Rate. wanted 555, got %d", spot.Rate)
}
// handleSpots should return one spot for the one market.
spotsI, err := rig.api.handleSpots(nil)
if err != nil {
t.Fatalf("handleSpots error: %v", err)
}
spotsEnc := spotsI.([]json.RawMessage)
if spotsEnc == nil {
t.Fatalf("failed to decode []json.RawMessage. spotsI is %T", spotsI)
}
if len(spotsEnc) != 1 {
t.Fatalf("expected 1 spot, got %d", len(spotsEnc))
}
reSpot := new(msgjson.Spot)
err = json.Unmarshal(spotsEnc[0], reSpot)
if err != nil {
t.Fatalf("error encoding spot: %v", err)
}
if reSpot.Vol24 != spot.Vol24 {
t.Fatalf("reSpot Vol24 mismatch, wanted %d, got %d", spot.Vol24, reSpot.Vol24)
}
// handleCandles should return three candles.
candlesI, err := rig.api.handleCandles(&msgjson.CandlesRequest{
BaseID: 42,
QuoteID: 0,
BinSize: "1s", // Epoch duration, smallest candle size
NumCandles: CacheSize,
})
if err != nil {
t.Fatalf("handleCandles error: %v", err)
}
wireCandles := candlesI.(*msgjson.WireCandles)
if wireCandles == nil {
t.Fatalf("failed to decode *msgjson.WireCandles. candlesI is %T", candlesI)
}
if len(wireCandles.StartRates) != 3 {
t.Fatalf("wrong number of candles. expected 3, got %d", len(wireCandles.StartRates))
}
}
func TestOrderBook(t *testing.T) {
rig := newTestRig()
book := new(msgjson.OrderBook)
rig.api.SetBookSource(&TBookSource{book})
bookI, err := rig.api.handleOrderBook(&msgjson.OrderBookSubscription{
Base: 42,
Quote: 0,
})
if err != nil {
t.Fatalf("handleOrderBook error: %v", err)
}
reBook := bookI.(*msgjson.OrderBook)
if reBook == nil {
t.Fatalf("failed to decode *msgjson.OrderBook. bookI is %T", bookI)
}
if reBook != book {
t.Fatalf("where did this book come from?")
}
}