Introduce JsStrategy skeleton

tests/compiler/dart2js/js_model/model_test.dart

Index: tests/compiler/dart2js/js_model/model_test.dart
diff --git a/tests/compiler/dart2js/js_model/model_test.dart b/tests/compiler/dart2js/js_model/model_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..b561418c11a728831d36a39f84ead95f51157996
--- /dev/null
+++ b/tests/compiler/dart2js/js_model/model_test.dart
@@ -0,0 +1,49 @@
+// Copyright (c) 2017, 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 'dart:async';
+import 'package:async_helper/async_helper.dart';
+import 'package:compiler/src/commandline_options.dart';
+import 'package:compiler/src/common.dart';
+import 'package:compiler/src/compiler.dart';
+import 'package:compiler/src/js_model/js_strategy.dart';
+import 'package:expect/expect.dart';
+import '../kernel/compiler_helper.dart';
+import '../serialization/helper.dart';
+
+const Map<String, String> SOURCE = const <String, String>{
+  'main.dart': r'''
+main() {}
+'''
+};
+
+main(List<String> args) {
+  asyncTest(() async {
+    await mainInternal(args);
+  });
+}
+
+Future mainInternal(List<String> args,
+    {bool skipWarnings: false, bool skipErrors: false}) async {
+  Arguments arguments = new Arguments.from(args);
+  Uri entryPoint;
+  Map<String, String> memorySourceFiles;
+  if (arguments.uri != null) {
+    entryPoint = arguments.uri;
+    memorySourceFiles = const <String, String>{};
+  } else {
+    entryPoint = Uri.parse('memory:main.dart');
+    memorySourceFiles = SOURCE;
+  }
+
+  enableDebugMode();
+
+  Compiler compiler1 = await compileWithDill(entryPoint, memorySourceFiles, [
+    Flags.disableInlining,
+    Flags.disableTypeInference
+  ], beforeRun: (Compiler compiler) {
+    compiler.backendStrategy = new JsBackendStrategy(compiler);
+  });
+  Expect.isFalse(compiler1.compilationFailed);
+}