Rip out the last dart:io dependency from pkg/http.

pkg/http/test/io/request_test.dart

+// Copyright (c) 2014, 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 http.test.io.request_test;
+
+import 'package:http/http.dart' as http;
+import 'package:unittest/unittest.dart';
+
+import 'utils.dart';
+
+void main() {
+  test('.send', () {
+    expect(startServer().then((_) {
+
+      var request = new http.Request('POST', serverUrl);
+      request.body = "hello";
+      request.headers['User-Agent'] = 'Dart';
+
+      expect(request.send().then((response) {
+        expect(response.statusCode, equals(200));
+        return response.stream.bytesToString();
+      }).whenComplete(stopServer), completion(parse(equals({
+        'method': 'POST',
+        'path': '/',
+        'headers': {
+          'content-type': ['text/plain; charset=utf-8'],
+          'accept-encoding': ['gzip'],
+          'user-agent': ['Dart'],
+          'content-length': ['5']
+        },
+        'body': 'hello'
+      }))));
+    }), completes);
+  });
+
+  test('#followRedirects', () {
+    expect(startServer().then((_) {
+      var request = new http.Request('POST', serverUrl.resolve('/redirect'))
+          ..followRedirects = false;
+      var future = request.send().then((response) {
+        expect(response.statusCode, equals(302));
+      });
+      expect(future.catchError((_) {}).then((_) => stopServer()), completes);
+      expect(future, completes);
+    }), completes);
+  });
+
+  test('#maxRedirects', () {
+    expect(startServer().then((_) {
+      var request = new http.Request('POST', serverUrl.resolve('/loop?1'))
+        ..maxRedirects = 2;
+      var future = request.send().catchError((error) {
+        expect(error, isRedirectLimitExceededException);
+        expect(error.redirects.length, equals(2));
+      });
+      expect(future.catchError((_) {}).then((_) => stopServer()), completes);
+      expect(future, completes);
+    }), completes);
+  });
+}