Modernize the style.

test/authorization_code_grant_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 authorization_code_grant_test;
-
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:test/test.dart';
 import 'package:http/http.dart' as http;
 import 'package:oauth2/oauth2.dart' as oauth2;
 
 import 'utils.dart';
 
 final redirectUrl = Uri.parse('http://example.com/redirect');
 
-ExpectClient client;
+void main() {
+  var client;
+  var grant;
+  setUp(() {
+    client = new ExpectClient();
+    grant = new oauth2.AuthorizationCodeGrant(
+        'identifier',
+        'secret',
+        Uri.parse('https://example.com/authorization'),
+        Uri.parse('https://example.com/token'),
+        httpClient: client);
+  });
 
-oauth2.AuthorizationCodeGrant grant;
-
-void createGrant() {
-  client = new ExpectClient();
-  grant = new oauth2.AuthorizationCodeGrant(
-      'identifier',
-      'secret',
-      Uri.parse('https://example.com/authorization'),
-      Uri.parse('https://example.com/token'),
-      httpClient: client);
-}
-
-void main() {
   group('.getAuthorizationUrl', () {
-    setUp(createGrant);
-
     test('builds the correct URL', () {
       expect(grant.getAuthorizationUrl(redirectUrl).toString(),
           equals('https://example.com/authorization'
               '?response_type=code'
               '&client_id=identifier'
               '&redirect_uri=http%3A%2F%2Fexample.com%2Fredirect'));
     });
 
     test('builds the correct URL with scopes', () {
       var authorizationUrl = grant.getAuthorizationUrl(
@@ skipping 34 matching lines @@
               '&redirect_uri=http%3A%2F%2Fexample.com%2Fredirect'));
     });
 
     test("can't be called twice", () {
       grant.getAuthorizationUrl(redirectUrl);
       expect(() => grant.getAuthorizationUrl(redirectUrl), throwsStateError);
     });
   });
 
   group('.handleAuthorizationResponse', () {
-    setUp(createGrant);
-
     test("can't be called before .getAuthorizationUrl", () {
       expect(grant.handleAuthorizationResponse({}), throwsStateError);
     });
 
     test("can't be called twice", () {
       grant.getAuthorizationUrl(redirectUrl);
       expect(grant.handleAuthorizationResponse({'code': 'auth code'}),
           throwsFormatException);
       expect(grant.handleAuthorizationResponse({'code': 'auth code'}),
           throwsStateError);
@@ skipping 44 matching lines @@
         }), 200, headers: {'content-type': 'application/json'}));
       });
 
       expect(grant.handleAuthorizationResponse({'code': 'auth code'})
             .then((client) => client.credentials.accessToken),
           completion(equals('access token')));
     });
   });
 
   group('.handleAuthorizationCode', () {
-    setUp(createGrant);
-
     test("can't be called before .getAuthorizationUrl", () {
       expect(grant.handleAuthorizationCode('auth code'), throwsStateError);
     });
 
     test("can't be called twice", () {
       grant.getAuthorizationUrl(redirectUrl);
       expect(grant.handleAuthorizationCode('auth code'), throwsFormatException);
       expect(grant.handleAuthorizationCode('auth code'), throwsStateError);
     });
 
@@ skipping 17 matching lines @@
       });
 
       expect(grant.handleAuthorizationCode('auth code'),
           completion(predicate((client) {
             expect(client.credentials.accessToken, equals('access token'));
             return true;
           })));
     });
   });
 }