Hot Restart progress events (#221)

Closes #220

Author: grouma

webdev/lib/src/daemon/app_domain.dart

@@ -23,6 +23,7 @@ class AppDomain extends Domain {
   WebdevVmClient _webdevVmClient;
   DebugService _debugService;
   bool _isShutdown = false;
+  var _progressEventId = 0;
 
   void _initialize(ServerManager serverManager) async {
     var devHandler = serverManager.servers.first.devHandler;
@@ -90,7 +91,20 @@ class AppDomain extends Domain {
     }
     // TODO(grouma) - Support pauseAfterRestart.
     // var pauseAfterRestart = getBoolArg(args, 'pause') ?? false;
+    _progressEventId++;
+    sendEvent('app.progress', {
+      'appId': _appId,
+      'id': '$_progressEventId',
+      'message': 'Performing hot restart...',
+      'progressId': 'hot.restart',
+    });
     var response = await _vmService.callServiceExtension('hotRestart');
+    sendEvent('app.progress', {
+      'appId': _appId,
+      'id': '$_progressEventId',
+      'finished': true,
+      'progressId': 'hot.restart',
+    });
     return {
       'code': response.type == 'Success' ? 0 : 1,
       'message': response.toString()

webdev/test/daemon/app_domain_test.dart

@@ -88,8 +88,16 @@ void main() {
         var extensionCall = '[{"method":"app.restart","id":0,'
             '"params" : { "appId" : "$appId", "fullRestart" : true}}]';
         webdev.stdin.add(utf8.encode('$extensionCall\n'));
-        await expectLater(webdev.stdout,
-            emitsThrough(startsWith('[{"id":0,"result":{"code":0')));
+        await expectLater(
+            webdev.stdout,
+            emitsThrough(emitsInOrder([
+              startsWith(
+                  '[{"event":"app.progress","params":{"appId":"$appId","id":"1",'
+                  '"message":"Performing hot restart..."'),
+              startsWith(
+                  '[{"event":"app.progress","params":{"appId":"$appId","id":"1",'
+                  '"finished":true')
+            ])));
         await exitWebdev(webdev);
       });
     });