Roll Observatory packages and add a roll script

packages/quiver/test/collection/collection_test.dart

+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+library quiver.collection.collection_test;
+
+import 'package:quiver/collection.dart';
+import 'package:test/test.dart';
+
+main() {
+  group('listsEqual', () {
+    test('return true for equal lists', () {
+      expect(listsEqual(null, null), isTrue);
+      expect(listsEqual([], []), isTrue);
+      expect(listsEqual([1], [1]), isTrue);
+      expect(listsEqual(['a', 'b'], ['a', 'b']), isTrue);
+    });
+
+    test('return false for non-equal lists', () {
+      expect(listsEqual(null, []), isFalse);
+      expect(listsEqual([], null), isFalse);
+      expect(listsEqual([1], [2]), isFalse);
+      expect(listsEqual([1], []), isFalse);
+      expect(listsEqual([], [1]), isFalse);
+    });
+  });
+
+  group('listMap', () {
+    test('return true for equal maps', () {
+      expect(mapsEqual(null, null), isTrue);
+      expect(mapsEqual({}, {}), isTrue);
+      expect(mapsEqual({'a': 1}, {'a': 1}), isTrue);
+    });
+
+    test('return false for non-equal maps', () {
+      expect(mapsEqual(null, {}), isFalse);
+      expect(mapsEqual({}, null), isFalse);
+      expect(mapsEqual({'a': 1}, {'a': 2}), isFalse);
+      expect(mapsEqual({'a': 1}, {'b': 1}), isFalse);
+      expect(mapsEqual({'a': 1}, {'a': 1, 'b': 2}), isFalse);
+      expect(mapsEqual({'a': 1, 'b': 2}, {'a': 1}), isFalse);
+    });
+  });
+
+  group('setsEqual', () {
+    test('return true for equal sets', () {
+      expect(setsEqual(null, null), isTrue);
+      expect(setsEqual(new Set(), new Set()), isTrue);
+      expect(setsEqual(new Set.from([1]), new Set.from([1])), isTrue);
+      expect(setsEqual(new Set.from(['a', 'b']), new Set.from(['a', 'b'])),
+          isTrue);
+    });
+
+    test('return false for non-equal sets', () {
+      expect(setsEqual(null, new Set()), isFalse);
+      expect(setsEqual(new Set(), null), isFalse);
+      expect(setsEqual(new Set.from([1]), new Set.from([2])), isFalse);
+      expect(setsEqual(new Set.from([1]), new Set()), isFalse);
+      expect(setsEqual(new Set(), new Set.from([1])), isFalse);
+    });
+  });
+}