changes for 0.3.9

test/map_mixin_test.dart

+#!/usr/bin/env dart
+// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Unit tests for PbMapMixin.
+// There are more tests in the dart-protoc-plugin package.
+library map_mixin_test;
+
+import 'dart:collection' show MapMixin;
+
+import 'package:protobuf/protobuf.dart'
+    show GeneratedMessage, PbMapMixin, BuilderInfo;
+import 'package:protobuf/src/protobuf/mixins/map_mixin.dart';
+import 'package:unittest/unittest.dart' show test, expect, predicate, same;
+
+// A minimal protobuf implementation compatible with PbMapMixin.
+class Rec extends GeneratedMessage with MapMixin, PbMapMixin {
+  int val = 0;
+  String str = "";
+  Rec child;
+
+  @override
+  BuilderInfo info_ = new BuilderInfo("rec")
+    ..a(1, "val", null)
+    ..a(2, "str", null)
+    ..a(3, "child", null);
+
+  @override
+  void clear() {
+    val = 0;
+    str = "";
+    child = null;
+  }
+
+  @override
+  int getTagNumber(String fieldName) {
+    switch (fieldName) {
+      case 'val':
+        return 1;
+      case 'str':
+        return 2;
+      case 'child':
+        return 3;
+      default:
+        return null;
+    }
+  }
+
+  @override
+  getField(int tagNumber) {
+    switch (tagNumber) {
+      case 1:
+        return val;
+      case 2:
+        return str;
+      case 3:
+        // lazy initializaton
+        if (child == null) {
+          child = new Rec();
+        }
+        return child;
+      default:
+        return null;
+    }
+  }
+
+  @override
+  void setField(int tagNumber, var value, [int fieldType = null]) {
+    switch (tagNumber) {
+      case 1:
+        val = value;
+        return;
+      case 2:
+        str = value;
+        return;
+      case 3:
+        child = value;
+        return;
+      default:
+        throw new ArgumentError("Rec doesn't support tag: ${tagNumber}");
+    }
+  }
+
+  @override
+  String toString() {
+    return "Rec(${val}, \"${str}\", ${child})";
+  }
+}
+
+main() {
+  test('PbMapMixin methods return default field values', () {
+    var r = new Rec();
+
+    expect(r.isEmpty, false);
+    expect(r.isNotEmpty, true);
+    expect(r.keys, ["val", "str", "child"]);
+
+    expect(r["val"], 0);
+    expect(r["str"], "");
+    expect(r["child"].runtimeType, Rec);
+    expect(r["child"].toString(), 'Rec(0, "", null)');
+
+    var v = r.values;
+    expect(v.length, 3);
+    expect(v.first, 0);
+    expect(v.toList()[1], "");
+    expect(v.last.toString(), 'Rec(0, "", null)');
+  });
+
+  test('operator []= sets record fields', () {
+    var r = new Rec();
+
+    r["val"] = 123;
+    expect(r.val, 123);
+    expect(r["val"], 123);
+
+    r["str"] = "hello";
+    expect(r.str, "hello");
+    expect(r["str"], "hello");
+
+    var child = new Rec();
+    r["child"] = child;
+    expect(r.child, same(child));
+    expect(r["child"], same(child));
+  });
+}