Re-apply "Remove unittest and matcher from the repo."

pkg/matcher/test/pretty_print_unminified_test.dart

-// Copyright (c) 2012, 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.
-
-// This file is for pretty-print tests that rely on the names of various Dart
-// types. These tests will fail when run in minified dart2js, since the names
-// will be mangled. A version of this file that works in minified dart2js is in
-// pretty_print_minified_test.dart.
-
-library matcher.print_unminified_test;
-
-import 'dart:collection';
-
-import 'package:matcher/matcher.dart';
-import 'package:matcher/src/pretty_print.dart';
-import 'package:unittest/unittest.dart' show test, group;
-
-class DefaultToString {}
-
-class CustomToString {
-  String toString() => "string representation";
-}
-
-class _PrivateName {
-  String toString() => "string representation";
-}
-
-class _PrivateNameIterable extends IterableMixin {
-  Iterator get iterator => [1, 2, 3].iterator;
-}
-
-void main() {
-  group('with an object', () {
-    test('with a default [toString]', () {
-      expect(prettyPrint(new DefaultToString()),
-          equals("<Instance of 'DefaultToString'>"));
-    });
-
-    test('with a custom [toString]', () {
-      expect(prettyPrint(new CustomToString()),
-          equals('CustomToString:<string representation>'));
-    });
-
-    test('with a custom [toString] and a private name', () {
-      expect(prettyPrint(new _PrivateName()),
-          equals('?:<string representation>'));
-    });
-  });
-
-  group('with an iterable', () {
-    test("that's not a list", () {
-      expect(prettyPrint([1, 2, 3, 4].map((n) => n * 2)),
-          equals("MappedListIterable:[2, 4, 6, 8]"));
-    });
-
-    test("that's not a list and has a private name", () {
-      expect(prettyPrint(new _PrivateNameIterable()),
-          equals("?:[1, 2, 3]"));
-    });
-  });
-}