Support unreachable code in blocks 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';
@@ skipping 468 matching lines @@
   if (a) {
     print(0);
   } else {
     print(1);
     print(2);
   }
 }
 ''');
   });
 
-  test('If statement', () {
+  test('Conditional expression', () {
     checkResult('''
 main(a) {
   return a ? print(0) : print(1);
 }
 ''', '''
 main(a) {
   return a ? print(0) : print(1);
 }
 ''');
   });
+

[sigurdm, 2014/10/21 08:22:44]

Maybe it would be beneficial to add a comment to each test stating what it is
testing.

[Johnni Winther, 2014/10/23 06:55:12]

Done.

+  test('Block statements', () {
+    checkResult('''
+main(a) {
+  return 0;
+  return 1;
+}
+''', '''
+main(a) {
+  return 0;
+}
+''');
+
+    checkResult('''
+main(a) {
+  if (a) {
+    return 0;
+    return 1;
+  } else {
+    return 2;
+    return 3;
+  }
+}
+''', '''
+main(a) {
+  return a ? 0 : 2;
+}
+''');
+
+    checkResult('''
+main(a) {
+  if (a) {
+    print(0);
+    return 0;
+    return 1;
+  } else {
+    print(2);
+    return 2;
+    return 3;
+  }
+}
+''', '''
+main(a) {
+  if (a) {
+    print(0);
+    return 0;
+  } else {
+    print(2);
+    return 2;
+  }
+}
+''');
+  });
 }
 
 checkResult(String input, [String expectedOutput]) {
   if (expectedOutput == null) {
     expectedOutput = input;
   }
 
   CollectingOutputProvider outputProvider = new CollectingOutputProvider();
   MemoryResourceProvider provider = new MemoryResourceProvider();
   DartSdk sdk = new MockSdk();
@@ skipping 24 matching lines @@
     sb.write(text);
   }
 
   void addError(errorEvent, [StackTrace stackTrace]) {}
 
   void close() {}
 
   String get text => sb.toString();
 }