jsons need tests and not groups in testcase so copy pasta

Author: Felix Van der Jeugt

src/dodona/feedback/DescribedGroup.java

@@ -1,7 +1,5 @@
 package dodona.feedback;
 
-import java.util.Optional;
-
 public class DescribedGroup<T> extends Group<T> {
 
     private Message description = null;

src/dodona/feedback/Testcase.java

@@ -1,7 +1,50 @@
 package dodona.feedback;
 
 import java.util.List;
-import java.util.Optional;
+import java.util.ArrayList;
+import java.util.stream.Stream;
+
+public class Testcase {
+
+    private Message description    = null;
+    private boolean accepted       = false;
+    private List<Message> messages = new ArrayList<>();
+    private List<Test> tests       = new ArrayList<>();
+
+    public void setDescription(Message description) {
+        this.description = description;
+    }
+
+    public void setAccepted(boolean accepted) {
+        this.accepted = accepted;
+    }
+
+    public void addMessage(Message message) {
+        this.messages.add(message);
+    }
+
+    public void addMessage(String message) {
+        this.messages.add(Message.plain(message));
+    }
+
+    public void clearMessages() {
+        this.messages.clear();
+    }
+
+    public void addChild(Test child) {
+        this.tests.add(child);
+    }
+
+    public void prependChild(Test child) {
+        this.tests.add(0, child);
+    }
+
+    public Test lastChild() {
+        return this.tests.get(this.tests.size() - 1);
+    }
+
+    public Stream<Test> children() {
+        return this.tests.stream();
+    }
 
-public class Testcase extends CheckedGroup<Test> {
 }