Reorganize the dart2js transformer tests.

sdk/lib/_internal/pub/test/dart2js/ignores_non_entrypoint_dart_files_test.dart

Index: sdk/lib/_internal/pub/test/dart2js/ignores_non_entrypoint_dart_files_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/ignores_non_entrypoint_dart_files_test.dart b/sdk/lib/_internal/pub/test/dart2js/ignores_non_entrypoint_dart_files_test.dart
similarity index 66%
rename from sdk/lib/_internal/pub/test/build/ignores_non_entrypoint_dart_files_test.dart
rename to sdk/lib/_internal/pub/test/dart2js/ignores_non_entrypoint_dart_files_test.dart
index fea77a6b38419b6761effda7ec30bedc2dbe7ca7..6dc92cfc1c25c056fa968f3836be6fe10fff1ac3 100644
--- a/sdk/lib/_internal/pub/test/build/ignores_non_entrypoint_dart_files_test.dart
+++ b/sdk/lib/_internal/pub/test/dart2js/ignores_non_entrypoint_dart_files_test.dart
@@ -2,13 +2,15 @@
 // 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:scheduled_test/scheduled_test.dart';
+
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
+import '../serve/utils.dart';
 
 main() {
   initConfig();
-
-  integration("ignores non-entrypoint Dart files", () {
+  setUp(() {
     d.dir(appPath, [
       d.appPubspec(),
       d.dir('web', [
@@ -18,7 +20,9 @@ main() {
         d.file('file4.dart', 'var foo;')
       ])
     ]).create();
+  });
 
+  integration("build ignores non-entrypoint Dart files", () {
     schedulePub(args: ["build"],
         output: new RegExp(r'Built 0 files to "build".'));
 
@@ -28,4 +32,14 @@ main() {
       ])
     ]).validate();
   });
+
+  integration("serve ignores non-entrypoint Dart files", () {
+    pubServe();
+    requestShould404("file1.dart.js");
+    requestShould404("file2.dart.js");
+    requestShould404("file3.dart.js");
+    requestShould404("file4.dart.js");
+    endPubServe();
+  });
+
 }