Serialize and resynthesize unresolved constant instance creations.

pkg/analyzer/test/src/summary/resynthesize_test.dart

Index: pkg/analyzer/test/src/summary/resynthesize_test.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_test.dart b/pkg/analyzer/test/src/summary/resynthesize_test.dart
index d6c1b518076f3521f7bf60f3f1745df58dfbfbd6..19a793ae2f4121a3642997ec0bb4cfdfdf5dd4af 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_test.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_test.dart
@@ -477,6 +477,9 @@ class ResynthTest extends ResolverTestCase {
 
   void compareConstructorElements(ConstructorElement resynthesized,
       ConstructorElement original, String desc) {
+    if (original == null && resynthesized == null) {
+      return;
+    }
     compareExecutableElements(resynthesized, original, desc);
     if (original.isConst) {
       ConstructorElementImpl resynthesizedImpl =
@@ -1457,6 +1460,23 @@ const V = const p.C.named();
 ''');
   }
 
+  test_const_invokeConstructor_named_unresolved() {
+    checkLibrary(
+        r'''
+class C {}
+const V = const C.named();
+''',
+        allowErrors: true);
+  }
+
+  test_const_invokeConstructor_named_unresolved2() {
+    checkLibrary(
+        r'''
+const V = const C.named();
+''',
+        allowErrors: true);
+  }
+

[Paul Berry, 2016/02/16 20:44:10]

Let's also add tests for cases involving prefixes, e.g.:

import 'a.dart' as p;
const V = const p.C.named();

(Test both the case where p.C exists but p.C.named() does not, as well as the
case where p.C does not exist)

[scheglov, 2016/02/16 21:48:44]

Done.

   test_const_invokeConstructor_unnamed() {
     checkLibrary(r'''
 class C {
@@ -1494,6 +1514,14 @@ const V = const p.C();
 ''');
   }
 
+  test_const_invokeConstructor_unnamed_unresolved() {
+    checkLibrary(
+        r'''
+const V = const C();
+''',
+        allowErrors: true);
+  }
+

[Paul Berry, 2016/02/16 20:44:10]

Similarly, also test the case:

import 'a.dart' as p;
const V = const p.C();

where p.C does not exist.

[scheglov, 2016/02/16 21:48:44]

Done.

   test_const_length_ofClassConstField() {
     checkLibrary(r'''
 class C {