Add tests to exercise room name / timeline logic; fix some bugs as a result.

spec/test-utils.js

@@ -10,3 +10,50 @@ module.exports.beforeEach = function(testCase) {
     console.log(desc);
     console.log(new Array(1 + desc.length).join("="));
 };
+
+/**
+ * Create a JSON object representing an Event.
+ * @param {string} type The event.type
+ * @param {string} room The event.room_id
+ * @param {string} userId The event.user_id
+ * @param {Object} content The event.content
+ */
+module.exports.mkEvent = function(type, room, userId, content) {
+    var event = {
+        type: type,
+        room_id: room,
+        user_id: userId,
+        content: content,
+        event_id: "$" + Math.random() + "-" + Math.random()
+    };
+    if (["m.room.name", "m.room.topic", "m.room.create", "m.room.join_rules",
+         "m.room.power_levels", "m.room.topic", "com.example.state"].indexOf(type)
+            !== -1) {
+        event.state_key = "";
+    }
+    return event;
+};
+
+module.exports.mkMembership = function(room, membership, userId, otherUserId,
+                                       displayName, avatarUrl) {
+    var event = module.exports.mkEvent("m.room.member", room, userId, {
+        membership: membership,
+        displayname: displayName,
+        avatar_url: avatarUrl
+    });
+    event.state_key = userId;
+    if (["invite", "ban"].indexOf(membership) !== -1) {
+        event.state_key = otherUserId;
+    }
+    return event;
+};
+
+module.exports.mkMessage = function(room, userId, msg) {
+    if (!msg) {
+        msg = "Random->"+Math.random();
+    }
+    return module.exports.mkEvent("m.room.message", room, userId, {
+        msgtype: "m.text",
+        body: msg
+    });
+};