Go: ZScore command added

Signed-off-by: Prateek Kumar <[email protected]>

go/api/base_client.go

@@ -1630,3 +1630,11 @@ func (client *baseClient) XLen(key string) (Result[int64], error) {
 	}
 	return handleLongResponse(result)
 }
+
+func (client *baseClient) ZScore(key string, member string) (float64, error) {
+	result, err := client.executeCommand(C.ZScore, []string{key, member})
+	if err != nil {
+		return 0.0, err
+	}
+	return float64(result.float_value), nil
+}

go/api/sorted_set_commands.go

@@ -376,4 +376,30 @@ type SortedSetCommands interface {
 	//
 	// [valkey.io]: https://valkey.io/commands/zrevrank/
 	ZRevRankWithScore(key string, member string) (Result[int64], Result[float64], error)
+
+	// Returns the score of `member` in the sorted set stored at `key`.
+	//
+	// See [valkey.io] for details.
+	//
+	// Parameters:
+	//   key - The key of the sorted set.
+	//   member - The member whose score is to be retrieved.
+	//
+	// Return value:
+	//  The score of the member. If `member` does not exist in the sorted set, null is returned.
+	//  If `key` does not exist, null is returned.
+	//
+	// Example:
+	//	membersScores := map[string]float64{
+	//		"one":   1.0,
+	//		"two":   2.0,
+	//		"three": 3.0,
+	//	}
+	//
+	//	zAddResult, err := client.ZAdd(key1, membersScores)
+	//	zScoreResult, err := client.ZScore(key1, "one")
+	//	//fmt.Println(zScoreResult) // Value: 1.0
+	//
+	// [valkey.io]: https://valkey.io/commands/zscore/
+	ZScore(key string, member string) (float64, error)
 }

go/integTest/shared_commands_test.go

@@ -4889,3 +4889,43 @@ func (suite *GlideTestSuite) Test_XAdd_XLen_XTrim() {
 		assert.IsType(t, &api.RequestError{}, err)
 	})
 }
+
+func (suite *GlideTestSuite) Test_ZScore() {
+	suite.runWithDefaultClients(func(client api.BaseClient) {
+		key1 := uuid.NewString()
+		key2 := uuid.NewString()
+		t := suite.T()
+
+		membersScores := map[string]float64{
+			"one":   1.0,
+			"two":   2.0,
+			"three": 3.0,
+		}
+
+		zAddResult, err := client.ZAdd(key1, membersScores)
+		assert.NoError(t, err)
+		assert.Equal(t, zAddResult.Value(), int64(3))
+
+		zScoreResult, err := client.ZScore(key1, "one")
+		assert.NoError(t, err)
+		assert.Equal(t, zScoreResult, float64(1.0))
+
+		zScoreResult, err = client.ZScore(key1, "non_existing_member")
+		assert.NoError(t, err)
+		assert.Equal(t, zScoreResult, float64(0))
+
+		zScoreResult, err = client.ZScore("non_existing_key", "non_existing_member")
+		assert.NoError(t, err)
+		assert.Equal(t, zScoreResult, float64(0))
+
+		// Key exists, but it is not a set
+		setResult, err := client.Set(key2, "bar")
+		assert.NoError(t, err)
+		assert.Equal(t, setResult.Value(), "OK")
+
+		_, err = client.ZScore(key2, "one")
+		assert.NotNil(t, err)
+		assert.IsType(t, &api.RequestError{}, err)
+
+	})
+}