Migrate test block 30 + corelib portion of block 31 to Dart 2.0.

tests/corelib_strong/uri_parameters_all_test.dart

-// Copyright (c) 2015, 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.
-
-import "package:expect/expect.dart";
-import 'dart:convert';
-
-main() {
-  testAll(["a", "b", "c"]);
-  testAll([""]);
-  testAll(["a"]);
-  testAll(["", ""]);
-  testAll(["baz"]);
-
-  testParse("z&y&w&z", {
-    "z": ["", ""],
-    "y": [""],
-    "w": [""]
-  });
-  testParse("x=42&y=42&x=37&y=37", {
-    "x": ["42", "37"],
-    "y": ["42", "37"]
-  });
-  testParse("x&x&x&x&x", {
-    "x": ["", "", "", "", ""]
-  });
-  testParse("x=&&y", {
-    "x": [""],
-    "y": [""]
-  });
-}
-
-testAll(List values) {
-  var uri =
-      new Uri(scheme: "foo", path: "bar", queryParameters: {"baz": values});
-  var list = uri.queryParametersAll["baz"];
-  Expect.listEquals(values, list);
-}
-
-testParse(query, results) {
-  var uri = new Uri(scheme: "foo", path: "bar", query: query);
-  var params = uri.queryParametersAll;
-  for (var k in results.keys) {
-    Expect.listEquals(results[k], params[k]);
-  }
-  uri = new Uri(scheme: "foo", path: "bar", queryParameters: results);
-  params = uri.queryParametersAll;
-  for (var k in results.keys) {
-    Expect.listEquals(results[k], params[k]);
-  }
-}