Compute literal constant values.

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

 // Copyright (c) 2015, 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 test.src.serialization.elements_test;
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/type.dart';
+import 'package:analyzer/src/generated/constant.dart';
 import 'package:analyzer/src/generated/element_handle.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/resolver.dart'
     show Namespace, TypeProvider;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/resynthesize.dart';
 import 'package:analyzer/src/summary/summarize_elements.dart';
 import 'package:unittest/unittest.dart';
 
 import '../../generated/resolver_test.dart';
 import '../../reflective_tests.dart';
 
 main() {
   groupSep = ' | ';
   runReflectiveTests(ResynthTest);
 }
 
 @reflectiveTest
 class ResynthTest extends ResolverTestCase {
   Set<Source> otherLibrarySources = new Set<Source>();
+  bool shouldCompareConstValues = false;
 
   /**
    * Determine the analysis options that should be used for this test.
    */
   AnalysisOptionsImpl get options =>
       new AnalysisOptionsImpl()..enableGenericMethods = true;
 
   void addLibrary(String uri) {
     otherLibrarySources.add(analysisContext2.sourceFactory.forUri(uri));
   }
@@ skipping 152 matching lines @@
         comparePropertyAccessorElements(resynthesized.accessors[i],
             original.accessors[i], 'getter ${original.accessors[i].name}');
       } else {
         comparePropertyAccessorElements(resynthesized.accessors[i],
             original.accessors[i], 'setter ${original.accessors[i].name}');
       }
     }
     // TODO(paulberry): test metadata and offsetToElementMap.
   }
 
+  void compareConstantValues(
+      DartObject resynthesized, DartObject original, String desc) {
+    if (original == null) {
+      expect(resynthesized, isNull, reason: desc);
+    } else {
+      expect(resynthesized, isNotNull, reason: desc);
+      compareTypes(resynthesized.type, original.type, desc);
+      expect(resynthesized.hasKnownValue, original.hasKnownValue, reason: desc);
+      if (original.isNull) {
+        expect(resynthesized.isNull, isTrue, reason: desc);
+      } else if (original.toBoolValue() != null) {
+        expect(resynthesized.toBoolValue(), original.toBoolValue(),
+            reason: desc);
+      } else if (original.toIntValue() != null) {
+        expect(resynthesized.toIntValue(), original.toIntValue(), reason: desc);
+      } else if (original.toDoubleValue() != null) {
+        expect(resynthesized.toDoubleValue(), original.toDoubleValue(),
+            reason: desc);
+      } else if (original.toListValue() != null) {
+        fail('Not implemented');
+      } else if (original.toMapValue() != null) {
+        fail('Not implemented');
+      } else if (original.toStringValue() != null) {
+        expect(resynthesized.toStringValue(), original.toStringValue(),
+            reason: desc);
+      } else if (original.toSymbolValue() != null) {
+        fail('Not implemented');
+      } else if (original.toTypeValue() != null) {
+        fail('Not implemented');
+      }
+      // TODO(scheglov) implement
+    }
+  }
+
   void compareConstructorElements(ConstructorElementImpl resynthesized,
       ConstructorElementImpl original, String desc) {
     compareExecutableElements(resynthesized, original, desc);
     // TODO(paulberry): test redirectedConstructor and constantInitializers
   }
 
   void compareElements(Element resynthesized, Element original, String desc) {
     expect(resynthesized, isNotNull);
     expect(resynthesized.kind, original.kind);
     expect(resynthesized.location, original.location, reason: desc);
@@ skipping 288 matching lines @@
     compareElements(resynthesized, original, desc);
     expect(resynthesized.uri, original.uri);
     expect(resynthesized.uriOffset, original.uriOffset, reason: desc);
     expect(resynthesized.uriEnd, original.uriEnd, reason: desc);
   }
 
   void compareVariableElements(VariableElementImpl resynthesized,
       VariableElementImpl original, String desc) {
     compareElements(resynthesized, original, desc);
     compareTypes(resynthesized.type, original.type, desc);
+    if (shouldCompareConstValues) {
+      compareConstantValues(
+          resynthesized.constantValue, original.constantValue, desc);
+    }
     // TODO(paulberry): test initializer
   }
 
   /**
    * Serialize the given [library] into a summary.  Then create a
    * [_TestSummaryResynthesizer] which can deserialize it, along with any
    * references it makes to `dart:core`.
    *
    * Errors will lead to a test failure unless [allowErrors] is `true`.
    */
@@ skipping 383 matching lines @@
   }
 
   test_class_type_parameters_f_bound_simple() {
     checkLibrary('class C<T extends U, U> {}');
   }
 
   test_classes() {
     checkLibrary('class C {} class D {}');
   }
 
+  test_const_topLevel_literal() {
+    shouldCompareConstValues = true;
+    checkLibrary(r'''
+const vNull = null;
+const vBoolFalse = false;
+const vBoolTrue = true;
+const vInt = 1;
+const vDouble = 2.3;
+const vString = 'abc';
+const vStringConcat = 'aaa' 'bbb';
+const vStringInterpolation = 'aaa ${true} ${42} bbb';
+''');
+  }
+
   test_constructor_documented() {
     checkLibrary('''
 class C {
   /**
    * Docs
    */
   C();
 }''');
   }
 
@@ skipping 927 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }