#225 Improve tests and implementation

client/src/main/java/dvoraka/avservice/client/service/response/ReplicationMessageList.java

@@ -26,4 +26,8 @@ public void add(ReplicationMessage message) {
     public Stream<ReplicationMessage> stream() {
         return messages.stream();
     }
+
+    public int size() {
+        return messages.size();
+    }
 }

client/src/test/groovy/dvoraka/avservice/client/service/response/ReplicationMessageListSpec.groovy

@@ -0,0 +1,42 @@
+package dvoraka.avservice.client.service.response
+
+import dvoraka.avservice.common.replication.ReplicationHelper
+import spock.lang.Specification
+import spock.lang.Subject
+
+/**
+ * List spec.
+ */
+class ReplicationMessageListSpec extends Specification implements ReplicationHelper {
+
+    @Subject
+    ReplicationMessageList messages
+
+
+    def setup() {
+        messages = new ReplicationMessageList()
+    }
+
+    def "add message"() {
+        expect:
+            messages.size() == 0
+
+        when:
+            messages.add(createDiscoverRequest('node ID'))
+
+        then:
+            messages.size() == 1
+    }
+
+    def "get stream"() {
+        expect:
+            messages.size() == 0
+
+        when:
+            messages.add(createDiscoverRequest('node ID'))
+            messages.add(createDiscoverRequest('node ID'))
+
+        then:
+            messages.stream().count() == 2
+    }
+}