pkg/shelf: case-insensitive headers, cleaner Request ctor, a lot more tests

sdk/lib/_internal/pub/test/test_pub.dart

 // Copyright (c) 2013, 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.
 
 /// Test infrastructure for testing pub. Unlike typical unit tests, most pub
 /// tests are integration tests that stage some stuff on the file system, run
 /// pub, and then validate the results. This library provides an API to build
 /// tests like that.
 library test_pub;
 
@@ skipping 90 matching lines @@
 /// Subsequent calls to [serve] will replace the previous server.
 void serve([List<d.Descriptor> contents]) {
   var baseDir = d.dir("serve-dir", contents);
 
   _hasServer = true;
 
   schedule(() {
     return _closeServer().then((_) {
       return shelf_io.serve((request) {
         currentSchedule.heartbeat();
-        var path = request.pathInfo.replaceFirst("/", "");
+        var path = request.url.path.replaceFirst("/", "");
         _requestedPaths.add(path);
 
         return validateStream(baseDir.load(path))
             .then((stream) => new shelf.Response.ok(stream))
             .catchError((error) {
           return new shelf.Response.notFound('File "$path" not found.');
         });
       }, '127.0.0.1', 0).then((server) {
         _server = server;
         _portCompleter.complete(_server.port);
@@ skipping 721 matching lines @@
         _lastMatcher.matches(item.last, matchState);
   }
 
   Description describe(Description description) {
     return description.addAll("(", ", ", ")", [_firstMatcher, _lastMatcher]);
   }
 }
 
 /// A [StreamMatcher] that matches multiple lines of output.
 StreamMatcher emitsLines(String output) => inOrder(output.split("\n"));