WIP - add support

tests/integration/results.go

@@ -16,6 +16,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/ipfs/go-cid"
 	"github.com/sourcenetwork/immutable"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -79,6 +80,41 @@ func areResultsAnyOf(expected AnyOf, actual any) bool {
 	return false
 }
 
+type UniqueCid struct {
+	ID any
+}
+
+var _ Validator = (*UniqueCid)(nil)
+
+func NewUniqueCid(id any) *UniqueCid {
+	return &UniqueCid{
+		ID: id,
+	}
+}
+
+func (ucid *UniqueCid) Validate(s *state, actualValue any, msgAndArgs ...any) {
+	isNew := true
+	for id, value := range s.cids {
+		if id == ucid.ID {
+			require.Equal(s.t, value, actualValue)
+			isNew = false
+		} else {
+			require.NotEqual(s.t, value, actualValue, "UniqueCid must be unique!", msgAndArgs)
+		}
+	}
+
+	if isNew {
+		require.IsType(s.t, "", actualValue)
+
+		cid, err := cid.Decode(actualValue.(string))
+		if err != nil {
+			require.NoError(s.t, err)
+		}
+
+		s.cids[ucid.ID] = cid.String()
+	}
+}
+
 // areResultsEqual returns true if the expected and actual results are of equal value.
 //
 // Values of type json.Number and immutable.Option will be reduced to their underlying types.

tests/integration/state.go

@@ -175,6 +175,8 @@ type state struct {
 	// nodes.
 	docIDs [][]client.DocID
 
+	cids map[any]string
+
 	// Indexes, by index, by collection index, by node index.
 	indexes [][][]client.IndexDescription
 
@@ -218,6 +220,7 @@ func newState(
 		collectionNames:          collectionNames,
 		collectionIndexesByRoot:  map[uint32]int{},
 		docIDs:                   [][]client.DocID{},
+		cids:                     map[any]string{},
 		indexes:                  [][][]client.IndexDescription{},
 		isBench:                  false,
 	}