[#150] policy: Check for redundant selectors and filters

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

netmap/policy_test.go

@@ -1,7 +1,6 @@
 package netmap_test
 
 import (
-	"strings"
 	"testing"
 
 	. "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
@@ -9,55 +8,6 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestEncode(t *testing.T) {
-	testCases := []string{
-		`REP 1 IN X
-CBF 1
-SELECT 2 IN SAME Location FROM * AS X`,
-
-		`REP 1
-SELECT 2 IN City FROM Good
-FILTER Country EQ RU AS FromRU
-FILTER @FromRU AND Rating GT 7 AS Good`,
-
-		`REP 7 IN SPB
-SELECT 1 IN City FROM SPBSSD AS SPB
-FILTER City EQ SPB AND SSD EQ true OR City EQ SPB AND Rating GE 5 AS SPBSSD`,
-
-		`REP 7 IN SPB
-SELECT 1 IN City FROM SPBSSD AS SPB
-FILTER NOT (NOT (City EQ SPB) AND SSD EQ true OR City EQ SPB AND Rating GE 5) AS SPBSSD`,
-
-		`UNIQUE
-REP 1
-REP 1`,
-
-		`REP 1 IN X
-SELECT 1 FROM F AS X
-FILTER 'UN-LOCODE' EQ 'RU LED' AS F`,
-	}
-
-	var p PlacementPolicy
-
-	for _, testCase := range testCases {
-		require.NoError(t, p.DecodeString(testCase))
-
-		var b strings.Builder
-		require.NoError(t, p.WriteStringTo(&b))
-
-		require.Equal(t, testCase, b.String())
-	}
-
-	invalidTestCases := []string{
-		`?REP 1`,
-		`REP 1 trailing garbage`,
-	}
-
-	for i := range invalidTestCases {
-		require.Error(t, p.DecodeString(invalidTestCases[i]), "#%d", i)
-	}
-}
-
 func TestPlacementPolicyEncoding(t *testing.T) {
 	v := netmaptest.PlacementPolicy()