further refactor of eventhandling

Co-Authored-By: Talha Caliskan <killerber4t@users.noreply.github.com>
Co-Authored-By: tomvahl <tomvahl@users.noreply.github.com>
Co-Authored-By: xxnitram <xxnitram@users.noreply.github.com>
Co-Authored-By: kasch309 <kasch309@users.noreply.github.com>

src/test/java/mops/gruppen2/domain/event/DeleteUserEventTest.java

@@ -0,0 +1,33 @@
+package mops.gruppen2.domain.event;
+
+import mops.gruppen2.domain.Group;
+import mops.gruppen2.domain.User;
+import org.junit.jupiter.api.Test;
+
+import static mops.gruppen2.domain.Role.MEMBER;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+class DeleteUserEventTest {
+
+    @Test
+    void apply() {
+        Group group = new Group();
+
+        User user = new User("user1","Stein", "Speck", "@sdasd");
+
+        group.getMembers().add(user);
+        group.getRoles().put("user1", MEMBER);
+
+        User user2 = new User("user2","Rock", "Roll", "and");
+
+        group.getMembers().add(user2);
+        group.getRoles().put("user2", MEMBER);
+
+        Event event = new DeleteUserEvent(1L, "user1");
+
+        event.apply(group);
+
+        assertThat(group.getRoles().size()).isEqualTo(1);
+    }
+}