Add service client support

examples/Dart/Test.dart

@@ -1,12 +1,42 @@
+import 'dart:async';
+import 'dart:io';
+
 import "./out/lib/example.dart";
 import "dart:convert";
 
-int main() {
-  var t = TestAtom(val_boolean: false, val_number: 1, val_string: "hi");
-  print(jsonEncode(t));
+void main() async {
+  var str = StreamController<Map<String, dynamic>>();
 
-  var t2 = TestEnum.VAL2;
-  print(jsonEncode(t2));
+  var provider = ServiceProvider(str.stream);
+  var sock = await Socket.connect("127.0.0.1", 8859);
 
-  return 0;
+  utf8.decoder.bind(sock).transform(new LineSplitter()).listen((line) {
+    str.add(jsonDecode(line));
+  });
+
+  provider.output.stream.listen((event) {
+    sock.writeln(jsonEncode(event));
+  });
+
+  var s = new TestServiceClient(provider);
+
+  var r = await s.AddValuesMultipleParams(10, 15);
+  print(r);
+
+  var r2 =
+      await s.AddValuesSingleParam(AddValueRequest(value1: 10, value2: 15));
+  print(r2?.value);
+
+  var catched = false;
+  await s.ThrowingError().catchError((err) {
+    catched = true;
+    print("Expected error was catched: " + err.toString());
+  });
+
+  if (!catched) {
+    throw Error();
+  }
+
+  await sock.close();
+  // exit(0);
 }