package indicator import ( "testing" "github.com/stretchr/testify/assert" "github.com/c9s/bbgo/pkg/fixedpoint" "github.com/c9s/bbgo/pkg/types" ) func Test_v2_Subtract(t *testing.T) { stream := &types.StandardStream{} kLines := KLines(stream, "", "") closePrices := ClosePrices(kLines) fastEMA := EWMA2(closePrices, 10) slowEMA := EWMA2(closePrices, 25) subtract := Subtract(fastEMA, slowEMA) for i := .0; i < 50.0; i++ { stream.EmitKLineClosed(types.KLine{Close: fixedpoint.NewFromFloat(19_000.0 + i)}) } t.Logf("fastEMA: %+v", fastEMA.slice) t.Logf("slowEMA: %+v", slowEMA.slice) assert.Equal(t, len(subtract.a), len(subtract.b)) assert.Equal(t, len(subtract.a), len(subtract.slice)) assert.InDelta(t, subtract.slice[0], subtract.a[0]-subtract.b[0], 0.0001) }