fix #1754 (#1756)

commands.go

@@ -179,6 +179,7 @@ type Cmdable interface {
 	LInsertAfter(ctx context.Context, key string, pivot, value interface{}) *IntCmd
 	LLen(ctx context.Context, key string) *IntCmd
 	LPop(ctx context.Context, key string) *StringCmd
+	LPopCount(ctx context.Context, key string, count int) *StringSliceCmd
 	LPos(ctx context.Context, key string, value string, args LPosArgs) *IntCmd
 	LPosCount(ctx context.Context, key string, value string, count int64, args LPosArgs) *IntSliceCmd
 	LPush(ctx context.Context, key string, values ...interface{}) *IntCmd
@@ -1314,6 +1315,12 @@ func (c cmdable) LPop(ctx context.Context, key string) *StringCmd {
 	return cmd
 }
 
+func (c cmdable) LPopCount(ctx context.Context, key string, count int) *StringSliceCmd {
+	cmd := NewStringSliceCmd(ctx, "lpop", key, count)
+	_ = c(ctx, cmd)
+	return cmd
+}
+
 type LPosArgs struct {
 	Rank, MaxLen int64
 }

commands_test.go

@@ -2050,6 +2050,25 @@ var _ = Describe("Commands", func() {
 			Expect(lRange.Val()).To(Equal([]string{"two", "three"}))
 		})
 
+		It("should LPopCount", func() {
+			rPush := client.RPush(ctx, "list", "one")
+			Expect(rPush.Err()).NotTo(HaveOccurred())
+			rPush = client.RPush(ctx, "list", "two")
+			Expect(rPush.Err()).NotTo(HaveOccurred())
+			rPush = client.RPush(ctx, "list", "three")
+			Expect(rPush.Err()).NotTo(HaveOccurred())
+			rPush = client.RPush(ctx, "list", "four")
+			Expect(rPush.Err()).NotTo(HaveOccurred())
+
+			lPopCount := client.LPopCount(ctx, "list", 2)
+			Expect(lPopCount.Err()).NotTo(HaveOccurred())
+			Expect(lPopCount.Val()).To(Equal([]string{"one", "two"}))
+
+			lRange := client.LRange(ctx, "list", 0, -1)
+			Expect(lRange.Err()).NotTo(HaveOccurred())
+			Expect(lRange.Val()).To(Equal([]string{"three", "four"}))
+		})
+
 		It("should LPos", func() {
 			rPush := client.RPush(ctx, "list", "a")
 			Expect(rPush.Err()).NotTo(HaveOccurred())