bbgo_origin/pkg/indicator/vwap_test.go

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package indicator
import (
"encoding/json"
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"math"
"testing"
"github.com/c9s/bbgo/pkg/fixedpoint"
"github.com/c9s/bbgo/pkg/types"
)
func Test_calculateVWAP(t *testing.T) {
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var trivialPrices = []byte(`[0]`)
var trivialVolumes = []byte(`[1]`)
var easyPrices = []byte(`[1, 2, 3]`)
var easyVolumes = []byte(`[4, 5, 6]`)
var windowPrices = []byte(`[1, 2, 3, 4]`)
var windowVolumes = []byte(`[4, 5, 6, 7]`)
var randomPrices = []byte(`[0.6046702879796195, 0.9405190880450124, 0.6645700532184904, 0.4377241871869802, 0.4246474970712657, 0.6868330728671094, 0.06564701921747622, 0.15652925473279125, 0.09697951891448456, 0.3009218605852871]`)
var randomVolumes = []byte(`[0.5152226285020653, 0.8136499609900968, 0.21427387258237493, 0.380667189299686, 0.31806817433032986, 0.4688998449024232, 0.2830441511804452, 0.2931118573368158, 0.6790946759202162, 0.2185630525927643]`)
buildKLines := func(pb, vb []byte) (kLines []types.KLine) {
var prices, volumes []fixedpoint.Value
_ = json.Unmarshal(pb, &prices)
_ = json.Unmarshal(vb, &volumes)
for i, p := range prices {
kLines = append(kLines, types.KLine{High: p, Low: p, Close: p, Volume: volumes[i]})
}
return kLines
}
tests := []struct {
name string
kLines []types.KLine
window int
want float64
}{
{
name: "trivial_case",
kLines: buildKLines(trivialPrices, trivialVolumes),
window: 0,
want: 0.0,
},
{
name: "easy_case",
kLines: buildKLines(easyPrices, easyVolumes),
window: 0,
want: (1*4 + 2*5 + 3*6) / float64(4+5+6),
},
{
name: "window_case",
kLines: buildKLines(windowPrices, windowVolumes),
window: 3,
want: (2*5 + 3*6 + 4*7) / float64(5+6+7),
},
{
name: "random_case",
kLines: buildKLines(randomPrices, randomVolumes),
window: 0,
want: 0.48727133857423566,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
priceF := KLineTypicalPriceMapper
got := calculateVWAP(tt.kLines, priceF, tt.window)
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diff := math.Trunc((got-tt.want)*100) / 100
if diff != 0 {
t.Errorf("calculateVWAP() = %v, want %v", got, tt.want)
}
})
}
}