Add a package for authenticating via OAuth2.

pkg/oauth2/test/client_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 client_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 requestUri = new Uri.fromString("http://example.com/resource");
+
+final Uri tokenEndpoint = new Uri.fromString('http://example.com/token');
+
+ExpectClient httpClient;
+
+void createHttpClient() {
+  httpClient = new ExpectClient();
+}
+
+void main() {
+  group('with expired credentials', () {
+    setUp(createHttpClient);
+
+    test("that can't be refreshed throws an ExpirationException on send", () {
+      var expiration = new Date.now().subtract(new Duration(hours: 1));
+      var credentials = new oauth2.Credentials(
+          'access token', null, null, [], expiration);
+      var client = new oauth2.Client('identifier', 'secret', credentials,
+          httpClient: httpClient);
+
+      expect(client.get(requestUri), throwsExpirationException);
+    });
+
+    test("that can be refreshed refreshes the credentials and sends the "
+        "request", () {
+      var expiration = new Date.now().subtract(new Duration(hours: 1));
+      var credentials = new oauth2.Credentials(
+          'access token', 'refresh token', tokenEndpoint, [], expiration);
+      var client = new oauth2.Client('identifier', 'secret', credentials,
+          httpClient: httpClient);
+
+      httpClient.expectRequest((request) {
+        expect(request.method, equals('POST'));
+        expect(request.url.toString(), equals(tokenEndpoint.toString()));
+        return new Future.immediate(new http.Response(JSON.stringify({
+          'access_token': 'new access token',
+          'token_type': 'bearer'
+        }), 200, headers: {'content-type': 'application/json'}));
+      });
+
+      httpClient.expectRequest((request) {
+        expect(request.method, equals('GET'));
+        expect(request.url.toString(), equals(requestUri.toString()));
+        expect(request.headers['authorization'],
+            equals('Bearer new access token'));
+
+        return new Future.immediate(new http.Response('good job', 200));
+      });
+
+      expect(client.read(requestUri).transform((_) {
+        expect(client.credentials.accessToken, equals('new access token'));
+      }), completes);
+    });
+  });
+
+  group('with valid credentials', () {
+    setUp(createHttpClient);
+
+    test("sends a request with bearer authorization", () {
+      var credentials = new oauth2.Credentials('access token');
+      var client = new oauth2.Client('identifier', 'secret', credentials,
+          httpClient: httpClient);
+
+      httpClient.expectRequest((request) {
+        expect(request.method, equals('GET'));
+        expect(request.url.toString(), equals(requestUri.toString()));
+        expect(request.headers['authorization'],
+            equals('Bearer access token'));
+
+        return new Future.immediate(new http.Response('good job', 200));
+      });
+
+      expect(client.read(requestUri), completion(equals('good job')));
+    });
+
+    test("can manually refresh the credentials", () {
+      var credentials = new oauth2.Credentials(
+          'access token', 'refresh token', tokenEndpoint);
+      var client = new oauth2.Client('identifier', 'secret', credentials,
+          httpClient: httpClient);
+
+      httpClient.expectRequest((request) {
+        expect(request.method, equals('POST'));
+        expect(request.url.toString(), equals(tokenEndpoint.toString()));
+        return new Future.immediate(new http.Response(JSON.stringify({
+          'access_token': 'new access token',
+          'token_type': 'bearer'
+        }), 200, headers: {'content-type': 'application/json'}));
+      });
+
+      expect(client.refreshCredentials().transform((_) {
+        expect(client.credentials.accessToken, equals('new access token'));
+      }), completes);
+    });
+
+    test("without a refresh token can't manually refresh the credentials", () {
+      var credentials = new oauth2.Credentials('access token');
+      var client = new oauth2.Client('identifier', 'secret', credentials,
+          httpClient: httpClient);
+
+      expect(client.refreshCredentials(), throwsStateError);
+    });
+  });
+}