Test ResolutionImpact equivalence.

pkg/compiler/lib/src/universe/selector.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 dart2js.selector;
 
 import '../common.dart';
 import '../common/names.dart' show
     Names;
 import '../elements/elements.dart' show
@@ skipping 44 matching lines @@
   List<String> get namedArguments => callStructure.namedArguments;
 
   String get name => memberName.text;
 
   LibraryElement get library => memberName.library;
 
   Selector.internal(this.kind,
                     this.memberName,
                     this.callStructure,
                     this.hashCode) {
-    assert(kind == SelectorKind.INDEX ||
-           (memberName != Names.INDEX_NAME &&
-            memberName != Names.INDEX_SET_NAME));
-    assert(kind == SelectorKind.OPERATOR ||
-           kind == SelectorKind.INDEX ||
-           !Elements.isOperatorName(memberName.text) ||
-           identical(memberName.text, '??'));
-    assert(kind == SelectorKind.CALL ||
-           kind == SelectorKind.GETTER ||
-           kind == SelectorKind.SETTER ||
-           Elements.isOperatorName(memberName.text) ||
-           identical(memberName.text, '??'));
+    assert(invariant(NO_LOCATION_SPANNABLE,
+        kind == SelectorKind.INDEX ||
+        (memberName != Names.INDEX_NAME &&
+         memberName != Names.INDEX_SET_NAME),
+        message: "kind=$kind,memberName=$memberName,"
+                 "callStructure:$callStructure"));
+    assert(invariant(NO_LOCATION_SPANNABLE,
+        kind == SelectorKind.OPERATOR ||
+        kind == SelectorKind.INDEX ||
+        !Elements.isOperatorName(memberName.text) ||
+        memberName.text == '??',
+        message: "kind=$kind,memberName=$memberName,"
+                 "callStructure:$callStructure"));
+    assert(invariant(NO_LOCATION_SPANNABLE,
+        kind == SelectorKind.CALL ||
+        kind == SelectorKind.GETTER ||
+        kind == SelectorKind.SETTER ||
+        Elements.isOperatorName(memberName.text) ||
+        memberName.text == '??',
+        message: "kind=$kind,memberName=$memberName,"
+                 "callStructure:$callStructure"));
   }
 
   // TODO(johnniwinther): Extract caching.
   static Map<int, List<Selector>> canonicalizedValues =
       new Map<int, List<Selector>>();
 
   factory Selector(SelectorKind kind,
                    Name name,
                    CallStructure callStructure) {
     // TODO(johnniwinther): Maybe use equality instead of implicit hashing.
@@ skipping 191 matching lines @@
     // Add bits from the call structure.
     return Hashing.mixHashCodeBits(hash, callStructure.hashCode);
   }
 
   String toString() {
     return 'Selector($kind, $name, ${callStructure.structureToString()})';
   }
 
   Selector toCallSelector() => new Selector.callClosureFrom(this);
 }