Test ResolutionImpact equivalence.

tests/compiler/dart2js/serialization_impact_test.dart

Index: tests/compiler/dart2js/serialization_impact_test.dart
diff --git a/tests/compiler/dart2js/serialization_impact_test.dart b/tests/compiler/dart2js/serialization_impact_test.dart
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+++ b/tests/compiler/dart2js/serialization_impact_test.dart
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+// Copyright (c) 2016, 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 dart2js.serialization_impact_test;
+
+import 'dart:async';
+import 'package:async_helper/async_helper.dart';
+import 'package:compiler/src/commandline_options.dart';
+import 'package:compiler/src/common/resolution.dart';
+import 'package:compiler/src/compiler.dart';
+import 'package:compiler/src/elements/elements.dart';
+import 'package:compiler/src/filenames.dart';
+import 'package:compiler/src/serialization/equivalence.dart';
+import 'memory_compiler.dart';
+import 'serialization_helper.dart';
+import 'serialization_test.dart';
+
+main(List<String> arguments) {
+  asyncTest(() async {
+    String serializedData = await serializeDartCore();
+    if (arguments.isNotEmpty) {
+      Uri entryPoint = Uri.base.resolve(nativeToUriPath(arguments.last));
+      await check(serializedData, entryPoint);
+    } else {
+      Uri entryPoint = Uri.parse('memory:main.dart');
+      await check(serializedData, entryPoint, {'main.dart': 'main() {}'});
+    }
+  });
+}
+
+Future check(
+  String serializedData,
+  Uri entryPoint,
+  [Map<String, String> sourceFiles = const <String, String>{}]) async {
+
+  Compiler compilerNormal = compilerFor(
+      memorySourceFiles: sourceFiles,
+      options: [Flags.analyzeOnly]);
+  compilerNormal.resolution.retainCaches = true;
+  await compilerNormal.run(entryPoint);
+
+  Compiler compilerDeserialized = compilerFor(
+      memorySourceFiles: sourceFiles,
+      options: [Flags.analyzeOnly]);
+  compilerDeserialized.resolution.retainCaches = true;
+  deserialize(compilerDeserialized, serializedData);
+  await compilerDeserialized.run(entryPoint);
+
+  checkResolutionImpacts(compilerNormal, compilerDeserialized);
+}
+
+/// Check equivalence of [impact1] and [impact2].
+void checkImpacts(Element element1, Element element2,
+                  ResolutionImpact impact1, ResolutionImpact impact2) {
+  if (impact1 == null || impact2 == null) return;
+
+  print('Checking impacts for $element1 vs $element2');
+
+  testResolutionImpactEquivalence(impact1, impact2, const CheckStrategy());
+}
+
+
+/// Check equivalence between all resolution impacts common to [compiler1] and
+/// [compiler2].
+void checkResolutionImpacts(Compiler compiler1, Compiler compiler2) {
+
+  void checkMembers(Element member1, Element member2) {
+    if (member1.isClass && member2.isClass) {
+      ClassElement class1 = member1;
+      ClassElement class2 = member2;
+      class1.forEachLocalMember((m1) {
+        checkMembers(m1, class2.lookupLocalMember(m1.name));
+      });
+      return;
+    }
+
+    if (!compiler1.resolution.hasResolutionImpact(member1)) {
+      return;
+    }
+
+    if (member2 == null) {
+      return;
+    }
+
+    if (areElementsEquivalent(member1, member2)) {
+      checkImpacts(
+          member1, member2,
+          compiler1.resolution.getResolutionImpact(member1),
+          compiler2.serialization.deserializer.getResolutionImpact(member2));
+    }
+  }
+
+  for (LibraryElement library1 in compiler1.libraryLoader.libraries) {
+    LibraryElement library2 =
+        compiler2.libraryLoader.lookupLibrary(library1.canonicalUri);
+    if (library2 != null) {
+      library1.forEachLocalMember((Element member1) {
+        checkMembers(member1, library2.localLookup(member1.name));
+      });
+
+    }
+  }
+}