fix coverage

test/encryption/encrypt_decrypt_room_message_test.dart

@@ -91,5 +91,9 @@ void main() {
       expect(decryptedEvent.content['msgtype'], 'm.text');
       expect(decryptedEvent.content['text'], 'Hello foxies!');
     });
+
+    test('dispose client', () async {
+      await client.dispose(closeDatabase: true);
+    });
   });
 }

test/encryption/encrypt_decrypt_to_device_test.dart

@@ -111,5 +111,10 @@ void main() {
       expect(decryptedEvent.type, 'm.to_device');
       expect(decryptedEvent.content['hello'], 'superfoxies');
     });
+
+    test('dispose client', () async {
+      await client.dispose(closeDatabase: true);
+      await otherClient.dispose(closeDatabase: true);
+    });
   });
 }

test/encryption/key_manager_test.dart

@@ -215,5 +215,9 @@ void main() {
               null,
           true);
     });
+
+    test('dispose client', () async {
+      await client.dispose(closeDatabase: true);
+    });
   });
 }

test/encryption/key_verification_test.dart

@@ -99,5 +99,9 @@ void main() {
       expect(verified, true);
       keyVerification?.dispose();
     });
+
+    test('dispose client', () async {
+      await client.dispose(closeDatabase: true);
+    });
   });
 }

test/encryption/olm_manager_test.dart

@@ -108,5 +108,9 @@ void main() {
               .containsKey(client.identityKey),
           true);
     });
+
+    test('dispose client', () async {
+      await client.dispose(closeDatabase: true);
+    });
   });
 }

test/room_test.dart

@@ -330,13 +330,13 @@ void main() {
       final dynamic resp = await room.sendEvent(
           {'msgtype': 'm.text', 'body': 'hello world'},
           txid: 'testtxid');
-      expect(resp, '\$event0');
+      expect(resp.startsWith('\$event'), true);
     });
 
     test('sendEvent', () async {
       final dynamic resp =
           await room.sendTextEvent('Hello world', txid: 'testtxid');
-      expect(resp, '\$event1');
+      expect(resp.startsWith('\$event'), true);
     });
 
     // Not working because there is no real file to test it...

test/timeline_test.dart

@@ -143,7 +143,8 @@ void main() {
       expect(updateCount, 5);
       expect(insertList, [0, 0, 0]);
       expect(insertList.length, timeline.events.length);
-      expect(timeline.events[0].eventId, '\$event0');
+      final eventId = timeline.events[0].eventId;
+      expect(eventId.startsWith('\$event'), true);
       expect(timeline.events[0].status, 1);
 
       client.onEvent.add(EventUpdate(
@@ -155,7 +156,7 @@ void main() {
             'content': {'msgtype': 'm.text', 'body': 'test'},
             'sender': '@alice:example.com',
             'status': 2,
-            'event_id': '\$event0',
+            'event_id': eventId,
             'unsigned': {'transaction_id': '1234'},
             'origin_server_ts': DateTime.now().millisecondsSinceEpoch
           },
@@ -166,7 +167,7 @@ void main() {
       expect(updateCount, 6);
       expect(insertList, [0, 0, 0]);
       expect(insertList.length, timeline.events.length);
-      expect(timeline.events[0].eventId, '\$event0');
+      expect(timeline.events[0].eventId, eventId);
       expect(timeline.events[0].status, 2);
     });