[Timeline] Implement tests for request history function.

lib/src/Room.dart

@@ -293,7 +293,7 @@ class Room {
 
   /// Request more previous events from the server.
   Future<void> requestHistory({int historyCount = 100}) async {
-    final dynamic resp = client.connection.jsonRequest(
+    final dynamic resp = await client.connection.jsonRequest(
         type: "GET",
         action: "/client/r0/rooms/$id/messages",
         data: {"from": prev_batch, "dir": "b", "limit": historyCount});
@@ -305,12 +305,12 @@ class Room {
         resp["end"] is String)) return;
 
     List<dynamic> history = resp["chunk"];
-    client.store.transaction(() {
+    client.store?.transaction(() {
       for (int i = 0; i < history.length; i++) {
         EventUpdate eventUpdate = EventUpdate(
-          eventType: "history",
+          type: "history",
           roomID: id,
-          type: history[i]["type"],
+          eventType: history[i]["type"],
           content: history[i],
         );
         client.connection.onEvent.add(eventUpdate);
@@ -319,6 +319,17 @@ class Room {
             "UPDATE Rooms SET prev_batch=? WHERE id=?", [resp["end"], id]);
       }
     });
+    if (client.store == null) {
+      for (int i = 0; i < history.length; i++) {
+        EventUpdate eventUpdate = EventUpdate(
+          type: "history",
+          roomID: id,
+          eventType: history[i]["type"],
+          content: history[i],
+        );
+        client.connection.onEvent.add(eventUpdate);
+      }
+    }
   }
 
   /// Sets this room as a direct chat for this user.

test/FakeMatrixApi.dart

@@ -62,6 +62,64 @@ class FakeMatrixApi extends MockClient {
 
   static final Map<String, Map<String, dynamic>> api = {
     "GET": {
+      "/client/r0/rooms/!1234:example.com/messages": (var req) => {
+            "start": "t47429-4392820_219380_26003_2265",
+            "end": "t47409-4357353_219380_26003_2265",
+            "chunk": [
+              {
+                "content": {
+                  "body": "This is an example text message",
+                  "msgtype": "m.text",
+                  "format": "org.matrix.custom.html",
+                  "formatted_body": "<b>This is an example text message</b>"
+                },
+                "type": "m.room.message",
+                "event_id": "3143273582443PhrSn:example.org",
+                "room_id": "!1234:example.com",
+                "sender": "@example:example.org",
+                "origin_server_ts": 1432735824653,
+                "unsigned": {"age": 1234}
+              },
+              {
+                "content": {"name": "The room name"},
+                "type": "m.room.name",
+                "event_id": "2143273582443PhrSn:example.org",
+                "room_id": "!1234:example.com",
+                "sender": "@example:example.org",
+                "origin_server_ts": 1432735824653,
+                "unsigned": {"age": 1234},
+                "state_key": ""
+              },
+              {
+                "content": {
+                  "body": "Gangnam Style",
+                  "url": "mxc://example.org/a526eYUSFFxlgbQYZmo442",
+                  "info": {
+                    "thumbnail_url":
+                        "mxc://example.org/FHyPlCeYUSFFxlgbQYZmoEoe",
+                    "thumbnail_info": {
+                      "mimetype": "image/jpeg",
+                      "size": 46144,
+                      "w": 300,
+                      "h": 300
+                    },
+                    "w": 480,
+                    "h": 320,
+                    "duration": 2140786,
+                    "size": 1563685,
+                    "mimetype": "video/mp4"
+                  },
+                  "msgtype": "m.video"
+                },
+                "type": "m.room.message",
+                "event_id": "1143273582443PhrSn:example.org",
+                "room_id": "!1234:example.com",
+                "sender": "@example:example.org",
+                "origin_server_ts": 1432735824653,
+                "unsigned": {"age": 1234}
+              }
+            ]
+          },
       "/client/versions": (var req) => {
             "versions": ["r0.0.1", "r0.1.0", "r0.2.0", "r0.3.0", "r0.4.0"],
             "unstable_features": {"m.lazy_load_members": true},

test/Timeline_test.dart

@@ -187,5 +187,17 @@ void main() {
       expect(timeline.events[0].content["txid"], "1234");
       expect(timeline.events[0].status, 1);
     });
+
+    test("Request history", () async {
+      await room.requestHistory();
+
+      await new Future.delayed(new Duration(milliseconds: 50));
+
+      expect(updateCount, 19);
+      expect(timeline.events.length, 9);
+      expect(timeline.events[6].id, "1143273582443PhrSn:example.org");
+      expect(timeline.events[7].id, "2143273582443PhrSn:example.org");
+      expect(timeline.events[8].id, "3143273582443PhrSn:example.org");
+    });
   });
 }