added test for anonymize function

src/test/java/de/anxietyprime/swajodel/SwaJodelApplicationTests.java

@@ -3,11 +3,44 @@ package de.anxietyprime.swajodel;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
+import java.util.Optional;
+
 @SpringBootTest
 class SwaJodelApplicationTests {
 
     @Test
-    void contextLoads() {
+    void anonymousTest() {
+        JodelPost post = new JodelPost(1000);
+        post.comments.add(new JodelPost(1001));
+        post.comments.add(new JodelPost(1002));
+        post.comments.get(0).comments.add(new JodelPost(1000));
+        post.comments.get(0).comments.add(new JodelPost(1001));
+        post.comments.get(0).comments.add(new JodelPost(1000));
+        post.comments.add(new JodelPost(1003));
+        post.comments.get(2).comments.add(new JodelPost(1001));
+        post.comments.get(2).comments.add(new JodelPost(1002));
+        post.comments.get(2).comments.add(new JodelPost(1003));
+        post.comments.get(2).comments.add(new JodelPost(1000));
+        post.comments.add(new JodelPost(1000));
+        post.comments.add(new JodelPost(1001));
+        post.comments.add(new JodelPost(1001));
+
+        post.anonymize(Optional.empty());
+
+        assert (post.anonymousID == 0);
+        assert (post.comments.get(0).anonymousID == 1);
+        assert (post.comments.get(1).anonymousID == 2);
+        assert (post.comments.get(2).anonymousID == 3);
+        assert (post.comments.get(3).anonymousID == 0);
+        assert (post.comments.get(4).anonymousID == 1);
+        assert (post.comments.get(5).anonymousID == 1);
+        assert (post.comments.get(0).comments.get(0).anonymousID == 0);
+        assert (post.comments.get(0).comments.get(1).anonymousID == 1);
+        assert (post.comments.get(0).comments.get(2).anonymousID == 0);
+        assert (post.comments.get(2).comments.get(0).anonymousID == 1);
+        assert (post.comments.get(2).comments.get(1).anonymousID == 2);
+        assert (post.comments.get(2).comments.get(2).anonymousID == 3);
+        assert (post.comments.get(2).comments.get(3).anonymousID == 0);
     }
 
 }