fix: handle case when there are no aggregated lots

cmd/root.go

@@ -14,13 +14,14 @@ import (
 )
 
 var (
+	Version    string = "v3.1.4"
 	configPath string
 	dep        c.Dependencies
 	ctx        c.Context
 	options    cli.Options
 	err        error
 	rootCmd    = &cobra.Command{
-		Version: "v3.1.3",
+		Version: Version,
 		Use:     "ticker",
 		Short:   "Terminal stock ticker and stock gain/loss tracker",
 		Args:    cli.Validate(&ctx, &options, &err),

internal/position/position.go

@@ -100,6 +100,10 @@ func GetSymbols(symbols []string, aggregatedLots map[string]AggregatedLot) []str
 func GetPositions(ctx c.Context, aggregatedLots map[string]AggregatedLot) func([]Quote) (map[string]Position, PositionSummary) {
 	return func(quotes []Quote) (map[string]Position, PositionSummary) {
 
+		if len(aggregatedLots) <= 0 {
+			return map[string]Position{}, PositionSummary{}
+		}
+
 		positionsReduced := (gubrak.
 			From(quotes).
 			Reduce(func(acc positionAcc, quote Quote) positionAcc {

internal/position/position_test.go

@@ -151,5 +151,26 @@ var _ = Describe("Position", func() {
 			}))
 			Expect(outputPositionSummary).To(Equal(expectedPositionSummary))
 		})
+
+		When("no aggregated lots are set", func() {
+			It("should return an empty positions and position summary", func() {
+				inputAggregatedLots := map[string]AggregatedLot{}
+				inputQuotes := []Quote{
+					{
+						ResponseQuote: ResponseQuote{
+							Symbol:                     "ARKW",
+							RegularMarketPreviousClose: 100,
+						},
+						Price:  120.0,
+						Change: 20.0,
+					},
+				}
+				inputCtx := c.Context{}
+				outputPositions, outputPositionSummary := GetPositions(inputCtx, inputAggregatedLots)(inputQuotes)
+				expectedPositionSummary := PositionSummary{}
+				Expect(outputPositions).To(Equal(map[string]Position{}))
+				Expect(outputPositionSummary).To(Equal(expectedPositionSummary))
+			})
+		})
 	})
 })