upgrade bitfield cmd to add multiple values (redis#2648)

Co-authored-by: wangzheng1 <[email protected]>
Co-authored-by: ofekshenawa <[email protected]>

commands.go

@@ -238,7 +238,7 @@ type Cmdable interface {
 	BitOpNot(ctx context.Context, destKey string, key string) *IntCmd
 	BitPos(ctx context.Context, key string, bit int64, pos ...int64) *IntCmd
 	BitPosSpan(ctx context.Context, key string, bit int8, start, end int64, span string) *IntCmd
-	BitField(ctx context.Context, key string, args ...interface{}) *IntSliceCmd
+	BitField(ctx context.Context, key string, values ...interface{}) *IntSliceCmd
 
 	Scan(ctx context.Context, cursor uint64, match string, count int64) *ScanCmd
 	ScanType(ctx context.Context, cursor uint64, match string, count int64, keyType string) *ScanCmd
@@ -1369,12 +1369,16 @@ func (c cmdable) BitPosSpan(ctx context.Context, key string, bit int8, start, en
 	return cmd
 }
 
-func (c cmdable) BitField(ctx context.Context, key string, args ...interface{}) *IntSliceCmd {
-	a := make([]interface{}, 0, 2+len(args))
-	a = append(a, "bitfield")
-	a = append(a, key)
-	a = append(a, args...)
-	cmd := NewIntSliceCmd(ctx, a...)
+// BitField accepts multiple values:
+//   - BitField("set", "i1", "offset1", "value1","cmd2", "type2", "offset2", "value2")
+//   - BitField([]string{"cmd1", "type1", "offset1", "value1","cmd2", "type2", "offset2", "value2"})
+//   - BitField([]interface{}{"cmd1", "type1", "offset1", "value1","cmd2", "type2", "offset2", "value2"})
+func (c cmdable) BitField(ctx context.Context, key string, values ...interface{}) *IntSliceCmd {
+	args := make([]interface{}, 2, 2+len(values))
+	args[0] = "bitfield"
+	args[1] = key
+	args = appendArgs(args, values)
+	cmd := NewIntSliceCmd(ctx, args...)
 	_ = c(ctx, cmd)
 	return cmd
 }

commands_test.go

@@ -1253,6 +1253,10 @@ var _ = Describe("Commands", func() {
 			nn, err := client.BitField(ctx, "mykey", "INCRBY", "i5", 100, 1, "GET", "u4", 0).Result()
 			Expect(err).NotTo(HaveOccurred())
 			Expect(nn).To(Equal([]int64{1, 0}))
+
+			nn, err = client.BitField(ctx, "mykey", "set", "i1", 1, 1, "GET", "u4", 0).Result()
+			Expect(err).NotTo(HaveOccurred())
+			Expect(nn).To(Equal([]int64{0, 4}))
 		})
 
 		It("should Decr", func() {