Added ZMScore command

cmd_sorted_set.go

@@ -33,6 +33,7 @@ func commandsSortedSet(m *Miniredis) {
 	m.srv.Register("ZREVRANGEBYSCORE", m.makeCmdZrangebyscore(true))
 	m.srv.Register("ZREVRANK", m.makeCmdZrank(true))
 	m.srv.Register("ZSCORE", m.cmdZscore)
+	m.srv.Register("ZMSCORE", m.cmdZMscore)
 	m.srv.Register("ZUNION", m.cmdZunion)
 	m.srv.Register("ZUNIONSTORE", m.cmdZunionstore)
 	m.srv.Register("ZSCAN", m.cmdZscan)
@@ -1044,6 +1045,49 @@ func (m *Miniredis) cmdZscore(c *server.Peer, cmd string, args []string) {
 	})
 }
 
+// ZMSCORE
+func (m *Miniredis) cmdZMscore(c *server.Peer, cmd string, args []string) {
+	if len(args) < 2 {
+		setDirty(c)
+		c.WriteError(errWrongNumber(cmd))
+		return
+	}
+	if !m.handleAuth(c) {
+		return
+	}
+	if m.checkPubsub(c, cmd) {
+		return
+	}
+
+	key, members := args[0], args[1:]
+
+	withTx(m, c, func(c *server.Peer, ctx *connCtx) {
+		db := m.db(ctx.selectedDB)
+
+		if !db.exists(key) {
+			c.WriteLen(len(members))
+			for range members {
+				c.WriteNull()
+			}
+			return
+		}
+
+		if db.t(key) != "zset" {
+			c.WriteError(ErrWrongType.Error())
+			return
+		}
+
+		c.WriteLen(len(args) - 1)
+		for _, member := range members {
+			if !db.ssetExists(key, member) {
+				c.WriteNull()
+				continue
+			}
+			c.WriteFloat(db.ssetScore(key, member))
+		}
+	})
+}
+
 // parseFloatRange handles ZRANGEBYSCORE floats. They are inclusive unless the
 // string starts with '('
 func parseFloatRange(s string) (float64, bool, error) {

cmd_sorted_set_test.go

@@ -1109,6 +1109,79 @@ func TestSortedSetScore(t *testing.T) {
 	})
 }
 
+// Test ZMSCORE
+func TestSortedSetMultiScore(t *testing.T) {
+	s, err := Run()
+	ok(t, err)
+	defer s.Close()
+	c, err := proto.Dial(s.Addr())
+	ok(t, err)
+	defer c.Close()
+
+	s.ZAdd("z", 1, "one")
+	s.ZAdd("z", 2, "two")
+	s.ZAdd("z", 2, "zwei")
+
+	// One member only
+	mustDo(t, c,
+		"ZMSCORE", "z", "two",
+		proto.Strings("2"),
+	)
+
+	// Two members
+	mustDo(t, c,
+		"ZMSCORE", "z", "one", "two",
+		proto.Strings("1", "2"),
+	)
+
+	// Three members
+	mustDo(t, c,
+		"ZMSCORE", "z", "one", "two", "zwei",
+		proto.Strings("1", "2", "2"),
+	)
+
+	// No such member
+	mustDo(t, c, "ZMSCORE", "z", "nosuch",
+		proto.Array(proto.Nil),
+	)
+
+	// One member exists, one doesn't
+	mustDo(t, c, "ZMSCORE", "z", "nosuch", "two",
+		proto.Array(proto.Nil, proto.String("2")),
+	)
+
+	// No such key
+	mustNil(t, c,
+		"ZSCORE", "nosuch", "nosuch",
+	)
+
+	// Direct
+	{
+		s.ZAdd("z2", 1, "one")
+		s.ZAdd("z2", 2, "two")
+		scores, err := s.ZMScore("z2", "one", "two")
+		ok(t, err)
+		equals(t, []float64{1.0, 2.0}, scores)
+	}
+
+	t.Run("errors", func(t *testing.T) {
+		mustDo(t, c,
+			"ZMSCORE",
+			proto.Error(errWrongNumber("zmscore")),
+		)
+		mustDo(t, c,
+			"ZMSCORE", "key",
+			proto.Error(errWrongNumber("zmscore")),
+		)
+
+		s.Set("str", "value")
+		mustDo(t, c,
+			"ZMSCORE", "str", "aap",
+			proto.Error(msgWrongType),
+		)
+	})
+}
+
 // Test ZRANGEBYLEX, ZREVRANGEBYLEX, ZLEXCOUNT
 func TestSortedSetRangeByLex(t *testing.T) {
 	s, err := Run()

db.go

@@ -468,6 +468,16 @@ func (db *RedisDB) ssetScore(key, member string) float64 {
 	return ss[member]
 }
 
+// ssetMScore returns multiple scores of a list of members in a sorted set.
+func (db *RedisDB) ssetMScore(key string, members []string) []float64 {
+	scores := make([]float64, 0, len(members))
+	ss := db.sortedsetKeys[key]
+	for _, member := range members {
+		scores = append(scores, ss[member])
+	}
+	return scores
+}
+
 // ssetRem is sorted set key delete.
 func (db *RedisDB) ssetRem(key, member string) bool {
 	ss := db.sortedsetKeys[key]

direct.go

@@ -666,6 +666,24 @@ func (db *RedisDB) ZScore(k, member string) (float64, error) {
 	return db.ssetScore(k, member), nil
 }
 
+// ZScore gives scores of a list of members in a sorted set.
+func (m *Miniredis) ZMScore(k string, members ...string) ([]float64, error) {
+	return m.DB(m.selectedDB).ZMScore(k, members)
+}
+
+func (db *RedisDB) ZMScore(k string, members []string) ([]float64, error) {
+	db.master.Lock()
+	defer db.master.Unlock()
+
+	if !db.exists(k) {
+		return nil, ErrKeyNotFound
+	}
+	if db.t(k) != "zset" {
+		return nil, ErrWrongType
+	}
+	return db.ssetMScore(k, members), nil
+}
+
 // XAdd adds an entry to a stream. `id` can be left empty or be '*'.
 // If a value is given normal XADD rules apply. Values should be an even
 // length.

integration/sorted_set_test.go

@@ -891,3 +891,24 @@ func TestZrandmember(t *testing.T) {
 		c.Error("not an integer", "ZRANDMEMBER", "q", "two")
 	})
 }
+
+func TestZMScore(t *testing.T) {
+	testRaw(t, func(c *client) {
+		c.Do("ZADD", "q", "1.0", "key1")
+		c.Do("ZADD", "q", "2.0", "key2")
+		c.Do("ZADD", "q", "3.0", "key3")
+		c.Do("ZADD", "q", "4.0", "key4")
+		c.Do("ZADD", "q", "5.0", "key5")
+
+		c.Do("ZMSCORE", "q", "key1")
+		c.Do("ZMSCORE", "q", "key1 key2 key3")
+		c.Do("ZMSCORE", "q", "nosuch")
+		c.Do("ZMSCORE", "nosuch", "key1")
+		c.Do("ZMSCORE", "nosuch", "key1", "key2")
+
+		// failure cases
+		c.Error("wrong number", "ZMSCORE", "q")
+		c.Do("SET", "str", "I am a string")
+		c.Error("wrong kind", "ZMSCORE", "str", "key1")
+	})
+}