1 files changed, 50 insertions, 0 deletions
diff --git a/swarm/storage/feeds/topic_test.go b/swarm/storage/feeds/topic_test.go
new file mode 100644
index 000000000..8994002d7
--- /dev/null
+++ b/swarm/storage/feeds/topic_test.go
@@ -0,0 +1,50 @@
+package feeds
+
+import (
+	"testing"
+
+	"github.com/ethereum/go-ethereum/common/hexutil"
+)
+
+func TestTopic(t *testing.T) {
+	related, _ := hexutil.Decode("0xabcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789")
+	topicName := "test-topic"
+	topic, _ := NewTopic(topicName, related)
+	hex := topic.Hex()
+	expectedHex := "0xdfa89c750e3108f9c2aeef0123456789abcdef0123456789abcdef0123456789"
+	if hex != expectedHex {
+		t.Fatalf("Expected %s, got %s", expectedHex, hex)
+	}
+
+	var topic2 Topic
+	topic2.FromHex(hex)
+	if topic2 != topic {
+		t.Fatal("Expected recovered topic to be equal to original one")
+	}
+
+	if topic2.Name(related) != topicName {
+		t.Fatal("Retrieved name does not match")
+	}
+
+	bytes, err := topic2.MarshalJSON()
+	if err != nil {
+		t.Fatal(err)
+	}
+	expectedJSON := `"0xdfa89c750e3108f9c2aeef0123456789abcdef0123456789abcdef0123456789"`
+	equal, err := areEqualJSON(expectedJSON, string(bytes))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !equal {
+		t.Fatalf("Expected JSON to be %s, got %s", expectedJSON, string(bytes))
+	}
+
+	err = topic2.UnmarshalJSON(bytes)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if topic2 != topic {
+		t.Fatal("Expected recovered topic to be equal to original one")
+	}
+
+}