tests/compiler/dart2js/reexport_handled_test.dart

// Copyright (c) 2013, 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 reexport_handled_test;

import 'dart:uri';
import 'mock_compiler.dart';
import '../../../sdk/lib/_internal/compiler/implementation/elements/elements.dart'
    show Element,
         LibraryElement;

final exportingLibraryUri = new Uri('exporting.dart');
const String EXPORTING_LIBRARY_SOURCE = '''
library exporting;
var foo;
''';

final reexportingLibraryUri = new Uri('reexporting.dart');
const String REEXPORTING_LIBRARY_SOURCE = '''
library reexporting;
export 'exporting.dart';
''';

void main() {
  var compiler = new MockCompiler();
  compiler.registerSource(exportingLibraryUri, EXPORTING_LIBRARY_SOURCE);
  compiler.registerSource(reexportingLibraryUri, REEXPORTING_LIBRARY_SOURCE);

  // Load exporting library before the reexporting library.
  var exportingLibrary = compiler.libraryLoader.loadLibrary(
      exportingLibraryUri, null, exportingLibraryUri);
  Expect.isTrue(exportingLibrary.exportsHandled);
  var foo = findInExports(exportingLibrary, 'foo');
  Expect.isNotNull(foo);
  Expect.isTrue(foo.isField());

  // Load reexporting library when exports are handled on the exporting library.
  var reexportingLibrary = compiler.libraryLoader.loadLibrary(
      reexportingLibraryUri, null, reexportingLibraryUri);
  foo = findInExports(reexportingLibrary, 'foo');
  Expect.isNotNull(foo);
  Expect.isTrue(foo.isField());
}

Element findInExports(LibraryElement library, String name) {
  for (var export in library.exports) {
    if (export.name.slowToString() == name) {
      return export;
    }
  }
  return null;
}