Support default constructors in analyzer2dart.

pkg/analyzer2dart/test/sexpr_data.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.
 
 /// Test data for sexpr_test.
 library test.sexpr.data;
 
 import 'test_helper.dart';
 
 class TestSpec extends TestSpecBase {
@@ skipping 1368 matching lines @@
                 (LetPrim (v5 (Constant (Null)))
                   (InvokeContinuation return (v5)))))
               (InvokeStatic print (v3) k2))))
           (InvokeMethod v1 call () k1)))))
     (InvokeStatic print (x) k0)))
 ''', skipInAnalyzerFrontend: true)
   ]),
 
   const Group('Constructors', const <TestSpec>[
     const TestSpec('''
+class C {}
+main() {
+  return new C();
+}
+''',
+    const {
+'main': '''
+(FunctionDefinition main () return
+  (LetCont ((k0 (v0)
+      (InvokeContinuation return (v0))))
+    (InvokeConstructor C () k0)))
+''',
+'C.': null}),
+
+    const TestSpec('''
 class C {
   C() {}
 }
 main() {
   return new C();
 }
 ''',
     const {
 'main': '''
 (FunctionDefinition main () return
   (LetCont ((k0 (v0)
       (InvokeContinuation return (v0))))
     (InvokeConstructor C () k0)))
 ''',
 'C.': '''
 (FunctionDefinition  () return
   (LetPrim (v0 (Constant (Null)))
     (InvokeContinuation return (v0))))
 '''}),
+
+    const TestSpec('''
+class B {}
+class C extends B {
+  C() {}
+}
+main() {
+  return new C();
+}
+''',
+    const {
+'main': '''
+(FunctionDefinition main () return
+  (LetCont ((k0 (v0)
+      (InvokeContinuation return (v0))))
+    (InvokeConstructor C () k0)))
+''',
+'B.': null,
+'C.': '''
+(FunctionDefinition  () return
+  (LetPrim (v0 (Constant (Null)))
+    (InvokeContinuation return (v0))))
+'''}),
+
+    const TestSpec('''
+class B {
+  B() {}
+}
+class C extends B {}
+main() {
+  return new C();
+}
+''',
+    const {
+'main': '''
+(FunctionDefinition main () return
+  (LetCont ((k0 (v0)
+      (InvokeContinuation return (v0))))
+    (InvokeConstructor C () k0)))
+''',
+'B.': '''
+(FunctionDefinition  () return
+  (LetPrim (v0 (Constant (Null)))
+    (InvokeContinuation return (v0))))
+''',
+'C.': null}),
   ]),
 
   const Group('Instance method', const <TestSpec>[
     const TestSpec('''
 class C {
   C() {}
   foo() {}
 }
 main() {
   return new C().foo();
 }
 ''',
     const {
 'main': '''
 (FunctionDefinition main () return
   (LetCont ((k0 (v0)
       (LetCont ((k1 (v1)
           (InvokeContinuation return (v1))))
         (InvokeMethod v0 foo () k1))))
     (InvokeConstructor C () k0)))
 ''',
 'C.foo': '''
 (FunctionDefinition foo () return
   (LetPrim (v0 (Constant (Null)))
     (InvokeContinuation return (v0))))
 '''}),
-]),
+  ]),
 ];