Register toString dynamic invocation in the presence of string interpolation.

tests/compiler/dart2js/resolver_test.dart

 // Copyright (c) 2012, 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.
 
+#import('dart:uri');
+
 #import("../../../lib/compiler/implementation/leg.dart");
 #import("../../../lib/compiler/implementation/elements/elements.dart");
+#import('../../../lib/compiler/implementation/source_file.dart');
 #import("../../../lib/compiler/implementation/tree/tree.dart");
 #import("../../../lib/compiler/implementation/util/util.dart");
 #import("mock_compiler.dart");
 #import("parser_helper.dart");
 
 Node buildIdentifier(String name) => new Identifier(scan(name));
 
 Node buildInitialization(String name) =>
   parseBodyCode('$name = 1',
       (parser, tokens) => parser.parseOptionallyInitializedIdentifier(tokens));
@@ skipping 45 matching lines @@
   // testOneInterface(); // Generates unexpected error message.
   // testTwoInterfaces(); // Generates unexpected error message.
   testFunctionExpression();
   testNewExpression();
   testTopLevelFields();
   testClassHierarchy();
   testInitializers();
   testThis();
   testSuperCalls();
   testTypeVariables();
+  testToString();
 }
 
 testTypeVariables() {
   matchResolvedTypes(visitor, text, name, expectedElements) {
     VariableDefinitions definition = parseStatement(text);
     visitor.visit(definition.type);
     InterfaceType type = visitor.mapping.getType(definition.type);
     Expect.equals(definition.type.typeArguments.length(),
                   length(type.arguments));
     int index = 0;
@@ skipping 629 matching lines @@
 length(Link link) => link.isEmpty() ? 0 : length(link.tail) + 1;
 
 at(Link link, int index) => (index == 0) ? link.head : at(link.tail, index - 1);
 
 List<String> asSortedStrings(Link link) {
   List<String> result = <String>[];
   for (; !link.isEmpty(); link = link.tail) result.add(link.head.toString());
   result.sort((s1, s2) => s1.compareTo(s2));
   return result;
 }
+
+testToString() {
+  String fileName = 'p.dart';
+  MockCompiler compiler = new MockCompiler();
+  compiler.sourceFiles[fileName] = new SourceFile(
+      fileName,
+      @"class C { toString() => 'C'; } main() { '${new C()}'; }");

[ahe, 2012/08/13 13:26:55]

Why can't this test use compiler.parseScript?

[Anton Muhin, 2012/08/13 13:49:42]

Something like this:

testToString() {
  MockCompiler compiler = new MockCompiler();
  compiler.parseScript(
      @"class C { toString() => 'C'; } main() { '${new C()}'; }");
  
  ClassElement classC = compiler.mainApp.find(buildSourceString('C'));
  classC.ensureResolved(compiler);
  Element toStringMethod =     
classC.lookupLocalMember(buildSourceString('toString'));
  Expect.isNotNull(toStringMethod);
  
  final resolvedElements = compiler.enqueuer.resolution.resolvedElements;
  print('---');
  resolvedElements.forEach((k, v) { print('$k: $v'); });
  print('---'); 
       Expect.isTrue(resolvedElements.containsKey(toStringMethod));
}

gives me an empty map.  Am I using the API correctly?

[ahe, 2012/08/13 15:05:56]

Try:

compiler.parseScript("class C { toString() => 'C'; }");
compiler.resolveStatement(@"'${new C()}';");

If that doesn't work, take a look at concrete_type_inference_test.dart, in
particular the method compileAndFind.

+
+  final mainApp = compiler.scanner.loadLibrary(new Uri(fileName), null);
+  final Element main = mainApp.find(buildSourceString('main'));
+  compiler.phase = Compiler.PHASE_RESOLVING;
+  compiler.processQueue(compiler.enqueuer.resolution, main);
+
+  ClassElement classC = mainApp.find(buildSourceString('C'));
+  Element toStringMethod =
+      classC.lookupLocalMember(buildSourceString('toString'));
+  Expect.isNotNull(toStringMethod);
+
+  final resolvedElements = compiler.enqueuer.resolution.resolvedElements;
+  Expect.isTrue(resolvedElements.containsKey(toStringMethod));
+}