First end-to-end capability in analyzer2dart.

pkg/analyzer2dart/test/end2end_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.
+
+/// End-to-end test of the analyzer2dart compiler.
+
+import 'dart:async';
+
+import 'mock_sdk.dart';
+import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/src/generated/element.dart';
+import 'package:analyzer/src/generated/sdk.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:compiler/implementation/dart_backend/backend_ast_to_frontend_ast.dart';
+import 'package:unittest/unittest.dart';
+
+import '../lib/src/closed_world.dart';
+import '../lib/src/driver.dart';
+import '../lib/src/converted_world.dart';
+import '../lib/src/dart_backend.dart';
+
+main() {
+  test('Empty main', () {
+    String expectedResult =  '''
+main() $NEW_BACKEND_COMMENT
+  {}
+
+''';
+    checkResult('''
+main() {}''',
+        expectedResult);
+
+    checkResult('''
+main() {}
+foo() {}''',
+        expectedResult);
+  });
+
+  test('Simple call-chains', () {
+    checkResult('''
+foo() {}
+main() {
+  foo();
+}
+''', '''
+foo() $NEW_BACKEND_COMMENT
+  {}
+
+main() $NEW_BACKEND_COMMENT
+  {
+    foo();
+  }
+
+''');
+
+    checkResult('''
+bar() {}
+foo() {
+  bar();
+}
+main() {
+  foo();
+}
+''', '''
+bar() $NEW_BACKEND_COMMENT
+  {}
+
+foo() $NEW_BACKEND_COMMENT
+  {
+    bar();
+  }
+
+main() $NEW_BACKEND_COMMENT
+  {
+    foo();
+  }
+
+''');
+
+    checkResult('''
+bar() {
+  main();
+}
+foo() {
+  bar();
+}
+main() {
+  foo();
+}
+''', '''
+bar() $NEW_BACKEND_COMMENT
+  {
+    main();
+  }
+
+foo() $NEW_BACKEND_COMMENT
+  {
+    bar();
+  }
+
+main() $NEW_BACKEND_COMMENT
+  {
+    foo();
+  }
+
+''');
+  });
+}
+
+checkResult(String input, String expectedOutput) {
+  CollectingOutputProvider outputProvider = new CollectingOutputProvider();
+  MemoryResourceProvider provider = new MemoryResourceProvider();
+  DartSdk sdk = new MockSdk();
+  Driver driver = new Driver(provider, sdk, outputProvider);
+  String rootFile = '/root.dart';
+  provider.newFile(rootFile, input);
+  Source rootSource = driver.setRoot(rootFile);
+  FunctionElement entryPoint = driver.resolveEntryPoint(rootSource);
+  ClosedWorld world = driver.computeWorld(entryPoint);
+  ConvertedWorld convertedWorld = convertWorld(world);
+  compileToDart(driver, convertedWorld);
+  String output = outputProvider.output.text;
+  expect(output, equals(expectedOutput));
+}
+
+class CollectingOutputProvider {
+  StringBufferSink output;
+
+  EventSink<String> call(String name, String extension) {
+    print('outputProvider($name,$extension)');
+    return output = new StringBufferSink();
+  }
+}
+
+class StringBufferSink implements EventSink<String> {
+  StringBuffer sb = new StringBuffer();
+
+  void add(String text) {
+    sb.write(text);
+  }
+
+  void addError(errorEvent, [StackTrace stackTrace]) {}
+
+  void close() {}
+
+  String get text => sb.toString();
+}
+