Try to resolve incrementally whole functions, constructors or methods.

pkg/analyzer/test/generated/incremental_resolver_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.
 
 library engine.incremental_resolver_test;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
@@ skipping 2032 matching lines @@
 }''', false);
       } else {
         _updateAndValidate(r'''
 main() {
   print(1);
 }''', false);
       }
     }
   }
 
+  void test_true_wholeConstructor() {
+    _resolveUnit(r'''
+class A {
+  A(int a) {
+    print(a);
+  }
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  A(int b) {
+    print(b);
+  }
+}
+''');
+  }
+
+  void test_true_wholeConstructor_addInitializer() {
+    _resolveUnit(r'''
+class A {
+  int field;
+  A();
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  int field;
+  A() : field = 5;
+}
+''');
+  }
+
+  void test_true_wholeFunction() {
+    _resolveUnit(r'''
+foo() {}
+main(int a) {
+  print(a);
+}
+''');
+    _updateAndValidate(r'''
+foo() {}
+main(int b) {
+  print(b);
+}
+''');
+  }
+
+  void test_true_wholeFunction_firstTokenInUnit() {
+    _resolveUnit(r'''
+main(int a) {
+  print(a);
+}
+''');
+    _updateAndValidate(r'''
+main(int b) {
+  print(b);
+}
+''');
+  }
+
+  void test_true_wholeMethod() {
+    _resolveUnit(r'''
+class A {
+  main(int a) {
+    print(a);
+  }
+}
+''');
+    _updateAndValidate(r'''
+class A {
+  main(int b) {
+    print(b);
+  }
+}
+''');
+  }
+
   void test_updateErrors_addNew_hints() {
     _resolveUnit(r'''
 main() {
   int v = 0;
   print(v);
 }
 ''');
     _updateAndValidate(r'''
 main() {
   int v = 0;
@@ skipping 1272 matching lines @@
     _visitList(node.metadata, other.metadata);
     _visitNode(node.identifier, other.identifier);
   }
 
   static void assertSameResolution(CompilationUnit actual,
       CompilationUnit expected) {
     _SameResolutionValidator validator = new _SameResolutionValidator(expected);
     actual.accept(validator);
   }
 }