Added DeleteGroupEvent and GroupDoesNotExistException

src/test/java/mops/gruppen2/service/GroupServiceTest.java

@@ -0,0 +1,77 @@
+package mops.gruppen2.service;
+
+import mops.gruppen2.domain.Exceptions.GroupDoesNotExistException;
+import mops.gruppen2.domain.Exceptions.UserNotFoundException;
+import mops.gruppen2.domain.Group;
+import mops.gruppen2.domain.event.AddUserEvent;
+import mops.gruppen2.domain.event.CreateGroupEvent;
+import mops.gruppen2.domain.event.DeleteGroupEvent;
+import mops.gruppen2.domain.event.Event;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+
+class GroupServiceTest {
+    GroupService groupService = new GroupService();
+
+    @BeforeEach
+    public void setUp() {
+    }
+
+    @Test
+    void applyEventOnGroupThatIsDeleted() throws Exception {
+        List<Event> eventList = new ArrayList<>();
+
+        eventList.add(new CreateGroupEvent(1, 10L, "prof1", "hi", "foo"));
+
+        eventList.add(new DeleteGroupEvent(44, 10, "loescher78"));
+
+        eventList.add(new AddUserEvent(900L, 10L, "Ulli", "Ulli", "Honnis", "FC@B.de"));
+
+
+        Assertions.assertThrows(GroupDoesNotExistException.class, () -> {
+            groupService.buildGroupFromEvents(eventList);
+        });
+    }
+
+    @Test
+    void returnDeletedGroup() throws Exception {
+        List<Event> eventList = new ArrayList<>();
+
+        eventList.add(new CreateGroupEvent(1, 10L, "prof1", "hi", "foo"));
+
+        eventList.add(new DeleteGroupEvent(44, 10, "loescher78"));
+
+        assertThat(groupService.buildGroupFromEvents(eventList)).isEqualTo(null);
+    }
+
+    @Test
+    void firstEventNotCreateGroup() throws Exception {
+        List<Event> eventList = new ArrayList<>();
+
+        eventList.add(new DeleteGroupEvent(44, 10, "loescher78"));
+        eventList.add(new CreateGroupEvent(1, 10L, "prof1", "hi", "foo"));
+
+        Assertions.assertThrows(GroupDoesNotExistException.class, () -> {
+            groupService.buildGroupFromEvents(eventList);
+        });
+    }
+
+    @Test
+    void sucsessfullReturnGroup() throws Exception {
+        List<Event> eventList = new ArrayList<>();
+
+        eventList.add(new CreateGroupEvent(1, 10L, "prof1", "hi", "foo"));
+
+        eventList.add(new AddUserEvent(900L, 10L, "Ulli", "Ulli", "Honnis", "FC@B.de"));
+
+        assertThat(groupService.buildGroupFromEvents(eventList)).isInstanceOf(Group.class);
+    }
+
+}