anchor.diff:      addSource(libFile, '''
           library testA;
           import "dart:async" deferred as bar;
  -        part "$testFile";''');
  +        part "${convertPathForImport(testFile)}";''');
       addTestSource('part of testA; foo() {bar.^}');
       // Assume that libraries containing has been computed for part files
       await computeLibrariesContaining();
  
positive.code:         class X { }
          class Y { }''');
      addTestSource('''
          import "/testB.dart" as b;
          var T2;
          class A { }
          main() {b.^}''');
  
negative.code:         class X { }
          class Y { }''');
      addTestSource('''
          import "${convertPathForImport("/testB.dart")}" as b;
          var T2;
          class A { }
          foo(b.^) {}''');
  