Add a package for authenticating via OAuth2.

pkg/oauth2/test/credentials_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.
+
+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 createHttpClient() {
+  httpClient = new ExpectClient();
+}
+
+void main() {
+  setUp(createHttpClient);

[Bob Nystrom, 2012/11/16 19:53:30]

Why not just inline the function here?

[nweiz, 2012/11/17 01:06:27]

Done.

+
+  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);
+  });
+
+  test("fromJson(toJson) should load the same credentials", () {
+    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));
+  });
+}