Use native async/await support in pub.

sdk/lib/_internal/pub_generated/test/dependency_computer/transformers_needed_by_library_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 pub_tests;
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-import 'utils.dart';
-
-void main() {
-  initConfig();
-
-  integration("reports a dependency if the library itself is transformed", () {
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": {
-            "path": "../foo"
-          }
-        },
-        "transformers": [{
-            "foo": {
-              "\$include": "bin/myapp.dart.dart"
-            }
-          }]
-      }),
-          d.dir(
-              "bin",
-              [d.file("myapp.dart", "import 'package:myapp/lib.dart';"),])]).create();
-
-    d.dir("foo", [d.pubspec({
-        "name": "foo",
-        "version": "1.0.0"
-      }), d.dir("lib", [d.file("foo.dart", transformer())])]).create();
-
-    expectLibraryDependencies('myapp|bin/myapp.dart', ['foo']);
-  });
-
-  integration(
-      "reports a dependency if a transformed local file is imported",
-      () {
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": {
-            "path": "../foo"
-          }
-        },
-        "transformers": [{
-            "foo": {
-              "\$include": "lib/lib.dart"
-            }
-          }]
-      }),
-          d.dir("lib", [d.file("lib.dart", ""),]),
-          d.dir(
-              "bin",
-              [d.file("myapp.dart", "import 'package:myapp/lib.dart';"),])]).create();
-
-    d.dir("foo", [d.pubspec({
-        "name": "foo",
-        "version": "1.0.0"
-      }), d.dir("lib", [d.file("foo.dart", transformer())])]).create();
-
-    expectLibraryDependencies('myapp|bin/myapp.dart', ['foo']);
-  });
-
-  integration(
-      "reports a dependency if a transformed foreign file is imported",
-      () {
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": {
-            "path": "../foo"
-          }
-        },
-      }),
-          d.dir(
-              "bin",
-              [d.file("myapp.dart", "import 'package:foo/foo.dart';")])]).create();
-
-    d.dir("foo", [d.pubspec({
-        "name": "foo",
-        "version": "1.0.0",
-        "transformers": [{
-            "foo": {
-              "\$include": "lib/foo.dart"
-            }
-          }]
-      }),
-          d.dir(
-              "lib",
-              [d.file("foo.dart", ""), d.file("transformer.dart", transformer())])]).create();
-
-    expectLibraryDependencies('myapp|bin/myapp.dart', ['foo']);
-  });
-
-  integration(
-      "doesn't report a dependency if no transformed files are " "imported",
-      () {
-    d.dir(appPath, [d.pubspec({
-        "name": "myapp",
-        "dependencies": {
-          "foo": {
-            "path": "../foo"
-          }
-        },
-        "transformers": [{
-            "foo": {
-              "\$include": "lib/lib.dart"
-            }
-          }]
-      }),
-          d.dir("lib", [d.file("lib.dart", ""), d.file("untransformed.dart", ""),]),
-          d.dir(
-              "bin",
-              [
-                  d.file(
-                      "myapp.dart",
-                      "import 'package:myapp/untransformed.dart';"),])]).create();
-
-    d.dir("foo", [d.pubspec({
-        "name": "foo",
-        "version": "1.0.0"
-      }), d.dir("lib", [d.file("foo.dart", transformer())])]).create();
-
-    expectLibraryDependencies('myapp|bin/myapp.dart', []);
-  });
-}