tests/compiler/dart2js/union_type_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.

import "package:expect/expect.dart";
import "compiler_helper.dart";
import "parser_helper.dart";

import "../../../sdk/lib/_internal/compiler/implementation/types/types.dart";
import "../../../sdk/lib/_internal/compiler/implementation/dart_types.dart";

main() {
  Compiler compiler = new MockCompiler();
  compiler.intClass.ensureResolved(compiler);
  compiler.stringClass.ensureResolved(compiler);

  FlatTypeMask mask1 =
      new FlatTypeMask.exact(new InterfaceType(compiler.intClass));
  FlatTypeMask mask2 =
      new FlatTypeMask.exact(new InterfaceType(compiler.stringClass));
  UnionTypeMask union1 = mask1.nonNullable().union(mask2, compiler);
  UnionTypeMask union2 = mask2.nonNullable().union(mask1, compiler);
  Expect.equals(union1, union2);
}