tests/web/deferred/multiple_default_arg_test.dart

// Copyright (c) 2017, 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.

/// This test is indirectly testing invariants of the generated code of dart2js.
/// It ensures that indices to metadata information from **multiple** deferred
/// fragments is kept separate, but that when they are loaded (and the metadata
/// array is merged) all accesses to the metadata array is done correctly.
///
/// This kind of metadata is generated when using Function.apply to
/// store default values and parameter names.
import 'multiple_default_arg_lib1.dart' deferred as lib1;
import 'multiple_default_arg_lib2.dart' deferred as lib2;
import 'multiple_default_arg_lib3.dart' deferred as lib3;

import 'package:expect/async_helper.dart';
import 'package:expect/expect.dart';

main() {
  asyncTest(() async {
    await lib1.loadLibrary();
    await lib2.loadLibrary();

    Expect.equals(
      Function.apply(lib1.myFunction1, [], {#argumentName1: () => "A"}),
      "A - 2",
    );

    Expect.equals(
      Function.apply(lib2.myFunction2, [], {#argumentName4: () => "B"}),
      "3 - B",
    );

    await lib3.loadLibrary();

    Expect.equals(
      Function.apply(lib3.myFunction3, ["x", "y"], {#argumentName4: () => "C"}),
      "x y 3b - C",
    );

    Expect.equals(
      Function.apply(lib3.myFunction3, ["x", "y"], {}),
      "x y 3b - 4b",
    );

    Expect.equals(Function.apply(lib3.myFunction4, ["x", "y"], {}), 5);
    Expect.equals(
      Function.apply(
        lib3.myFunction4,
        ["x", "y"],
        {#argumentName5: new lib3.X(4)},
      ),
      4,
    );
    Expect.equals(
      Function.apply(
        lib3.myFunction4,
        ["x", "y"],
        {#argumentName5: lib3.value3},
      ),
      3,
    );
  });
}