[#146] sdk/object: Add structures for object search rpc call

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/object/search_test.go

@@ -0,0 +1,53 @@
+package object_test
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/pkg/object"
+	v2object "github.com/nspcc-dev/neofs-api-go/v2/object"
+	"github.com/stretchr/testify/require"
+)
+
+var (
+	eqV2Matches = map[object.SearchMatchType]v2object.MatchType{
+		object.MatchUnknown:     v2object.MatchUnknown,
+		object.MatchStringEqual: v2object.MatchStringEqual,
+	}
+)
+
+func TestMatch(t *testing.T) {
+	t.Run("known matches", func(t *testing.T) {
+		for i := object.MatchUnknown; i <= object.MatchStringEqual; i++ {
+			require.Equal(t, eqV2Matches[i], i.ToV2())
+			require.Equal(t, object.SearchMatchFromV2(i.ToV2()), i)
+		}
+	})
+
+	t.Run("unknown matches", func(t *testing.T) {
+		require.Equal(t, (object.MatchStringEqual + 1).ToV2(), v2object.MatchUnknown)
+		require.Equal(t, object.SearchMatchFromV2(v2object.MatchStringEqual+1), object.MatchUnknown)
+	})
+}
+
+func TestFilter(t *testing.T) {
+	inputs := [][]string{
+		{"user-header", "user-value"},
+		{object.HdrSysNameID, "objectID"},
+	}
+
+	filters := object.NewSearchFilters()
+	for i := range inputs {
+		filters.AddFilter(inputs[i][0], inputs[i][1], object.MatchStringEqual)
+	}
+
+	require.Len(t, filters, len(inputs))
+	for i := range inputs {
+		require.Equal(t, inputs[i][0], filters[i].Header())
+		require.Equal(t, inputs[i][1], filters[i].Value())
+		require.Equal(t, object.MatchStringEqual, filters[i].Operation())
+	}
+
+	v2 := filters.ToV2()
+	newFilters := object.NewSearchFiltersFromV2(v2)
+	require.Equal(t, filters, newFilters)
+}