Type check field initializers.

tests/compiler/dart2js/patch_test.dart

 // Copyright (c) 2012, 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 "package:expect/expect.dart";
 import "../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart";
 import "../../../sdk/lib/_internal/compiler/implementation/elements/elements.dart";
 import "../../../sdk/lib/_internal/compiler/implementation/tree/tree.dart";
 import "../../../sdk/lib/_internal/compiler/implementation/util/util.dart";
 import "mock_compiler.dart";
@@ skipping 701 matching lines @@
   // Check that the declaration method in the declaration class is a target
   // for a typed selector on a subclass.
   cls = ensure(compiler, "B", compiler.coreLibrary.find);
   cls.ensureResolved(compiler);
   typedSelector = new TypedSelector.exact(cls.rawType, selector);
   Expect.isTrue(selector.applies(method, compiler));
   Expect.isTrue(typedSelector.applies(method, compiler));
 }
 
 void testAnalyzeAllInjectedMembers() {
-  String patchText = """
-                     void method() {
-                       String s = 0;
-                     }
-                     """;
-  var compiler = applyPatch('', patchText, analyzeAll: true, analyzeOnly: true);
-  compiler.librariesToAnalyzeWhenRun = [Uri.parse('dart:core')];
-  compiler.runCompiler(null);
-  compareWarningKinds(patchText,
-      [MessageKind.NOT_ASSIGNABLE], compiler.warnings);
+  void expect(String patchText, [expectedWarnings]) {
+    if (expectedWarnings == null) expectedWarnings = [];
+    if (expectedWarnings is! List) expectedWarnings = [expectedWarnings];
+
+    var compiler = applyPatch('', patchText,
+                              analyzeAll: true, analyzeOnly: true);
+    compiler.librariesToAnalyzeWhenRun = [Uri.parse('dart:core')];
+    compiler.runCompiler(null);
+    compareWarningKinds(patchText, expectedWarnings, compiler.warnings);
+  }
+
+  expect('String s = 0;', MessageKind.NOT_ASSIGNABLE);
+  expect('void method() { String s = 0; }', MessageKind.NOT_ASSIGNABLE);
+  expect('''
+         class Class {
+           String s = 0;
+         }
+         ''',
+         MessageKind.NOT_ASSIGNABLE);
+  expect('''
+         class Class {
+           void method() {
+             String s = 0;
+           }
+         }
+         ''',
+         MessageKind.NOT_ASSIGNABLE);
 }
 
 void testTypecheckPatchedMembers() {
   String originText = "external void method();";
   String patchText = """
                      patch void method() {
                        String s = 0;
                      }
                      """;
   var compiler = applyPatch(originText, patchText,
@@ skipping 30 matching lines @@
   testPatchNoGetter();
   testPatchNonSetter();
   testPatchNoSetter();
   testPatchNonFunction();
 
   testPatchAndSelector();
 
   testAnalyzeAllInjectedMembers();
   testTypecheckPatchedMembers();
 }