Add a package for authenticating via OAuth2.

pkg/oauth2/test/credentials_test.dart

Index: pkg/oauth2/test/credentials_test.dart
diff --git a/pkg/oauth2/test/credentials_test.dart b/pkg/oauth2/test/credentials_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..93763a13424b24792ddb20847cec2430eb1695e7
--- /dev/null
+++ b/pkg/oauth2/test/credentials_test.dart
@@ -0,0 +1,143 @@
+// 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.
+
+library credentials_test;
+
+import 'dart:io';
+import 'dart:json';
+import 'dart:uri';
+
+import '../../unittest/lib/unittest.dart';
+import '../../http/lib/http.dart' as http;
+import '../lib/oauth2.dart' as oauth2;
+import 'utils.dart';
+
+final Uri tokenEndpoint = new Uri.fromString('http://example.com/token');
+
+ExpectClient httpClient;
+
+void main() {
+  setUp(() => httpClient = new ExpectClient());
+
+  test('is not expired if no expiration exists', () {
+    var credentials = new oauth2.Credentials('access token');
+    expect(credentials.isExpired, isFalse);
+  });
+
+  test('is not expired if the expiration is in the future', () {
+    var expiration = new Date.now().add(new Duration(hours: 1));
+    var credentials = new oauth2.Credentials(
+        'access token', null, null, null, expiration);
+    expect(credentials.isExpired, isFalse);
+  });
+
+  test('is expired if the expiration is in the past', () {
+    var expiration = new Date.now().subtract(new Duration(hours: 1));
+    var credentials = new oauth2.Credentials(
+        'access token', null, null, null, expiration);
+    expect(credentials.isExpired, isTrue);
+  });
+
+  test("can't refresh without a refresh token", () {
+    var credentials = new oauth2.Credentials(
+        'access token', null, tokenEndpoint);
+    expect(credentials.canRefresh, false);
+    expect(credentials.refresh('identifier', 'secret', httpClient: httpClient),
+        throwsStateError);
+  });
+
+  test("can't refresh without a token endpoint", () {
+    var credentials = new oauth2.Credentials('access token', 'refresh token');
+    expect(credentials.canRefresh, false);
+    expect(credentials.refresh('identifier', 'secret', httpClient: httpClient),
+        throwsStateError);
+  });
+
+  test("can refresh with a refresh token and a token endpoint", () {
+    var credentials = new oauth2.Credentials(
+        'access token', 'refresh token', tokenEndpoint, ['scope1', 'scope2']);
+    expect(credentials.canRefresh, true);
+
+    httpClient.expectRequest((request) {
+      expect(request.method, equals('POST'));
+      expect(request.url.toString(), equals(tokenEndpoint.toString()));
+      expect(request.bodyFields, equals({
+        "grant_type": "refresh_token",
+        "refresh_token": "refresh token",
+        "scope": "scope1 scope2",
+        "client_id": "identifier",
+        "client_secret": "secret"
+      }));
+
+      return new Future.immediate(new http.Response(JSON.stringify({
+        'access_token': 'new access token',
+        'token_type': 'bearer'
+      }), 200, headers: {'content-type': 'application/json'}));
+    });
+
+    
+    expect(credentials.refresh('identifier', 'secret', httpClient: httpClient)
+        .transform((credentials) {
+      expect(credentials.accessToken, equals('new access token'));
+    }), completes);
+  });
+
+  group("fromJson", () {
+    oauth2.Credentials fromMap(Map map) =>
+      new oauth2.Credentials.fromJson(JSON.stringify(map));
+
+    test("should load the same credentials from toJson", () {
+      var expiration = new Date.now().subtract(new Duration(hours: 1));
+      var credentials = new oauth2.Credentials(
+          'access token', 'refresh token', tokenEndpoint, ['scope1', 'scope2'],
+          expiration);
+      var reloaded = new oauth2.Credentials.fromJson(credentials.toJson());
+
+      expect(reloaded.accessToken, equals(credentials.accessToken));
+      expect(reloaded.refreshToken, equals(credentials.refreshToken));
+      expect(reloaded.tokenEndpoint.toString(),
+          equals(credentials.tokenEndpoint.toString()));
+      expect(reloaded.scopes, equals(credentials.scopes));
+      expect(reloaded.expiration, equals(credentials.expiration));
+    });
+
+    test("should throw a FormatException for invalid JSON", () {
+      expect(() => new oauth2.Credentials.fromJson("foo bar"),
+          throwsFormatException);
+    });
+
+    test("should throw a FormatException for JSON that's not a map", () {
+      expect(() => new oauth2.Credentials.fromJson("null"),
+          throwsFormatException);
+    });
+
+    test("should throw a FormatException if there is no accessToken", () {
+      expect(() => fromMap({}), throwsFormatException);
+    });
+
+    test("should throw a FormatException if accessToken is not a string", () {
+      expect(() => fromMap({"accessToken": 12}), throwsFormatException);
+    });
+
+    test("should throw a FormatException if refreshToken is not a string", () {
+      expect(() => fromMap({"accessToken": "foo", "refreshToken": 12}),
+          throwsFormatException);
+    });
+
+    test("should throw a FormatException if tokenEndpoint is not a string", () {
+      expect(() => fromMap({"accessToken": "foo", "tokenEndpoint": 12}),
+          throwsFormatException);
+    });
+
+    test("should throw a FormatException if scopes is not a list", () {
+      expect(() => fromMap({"accessToken": "foo", "scopes": 12}),
+          throwsFormatException);
+    });
+
+    test("should throw a FormatException if expiration is not an int", () {
+      expect(() => fromMap({"accessToken": "foo", "expiration": "12"}),
+          throwsFormatException);
+    });
+  });
+}