| // Copyright (c) 2022, 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. |
| |
| // Tests implicit downcasts in js_util. |
| |
| @JS() |
| library js_util_implicit_downcast_test; |
| |
| import 'package:js/js.dart'; |
| import 'package:js/js_util.dart' as js_util; |
| import 'package:expect/minitest.dart'; |
| |
| @JS() |
| external void eval(String code); |
| |
| @JS() |
| class Foo { |
| external Foo(num a); |
| |
| external num get a; |
| external void set a(_); |
| external num bar(); |
| } |
| |
| bool isComplianceMode() { |
| var stuff = [1, 'string']; |
| var a = stuff[0]; |
| // Detect whether we are using --omit-implicit-checks. |
| try { |
| String s = a as dynamic; |
| return false; |
| } catch (e) { |
| // Ignore. |
| } |
| return true; |
| } |
| |
| main() { |
| eval(r""" |
| function Foo(a) { |
| this.a = a; |
| } |
| |
| Foo.prototype.bar = function() { |
| return this.a; |
| } |
| """); |
| |
| if (isComplianceMode()) { |
| complianceModeTest(); |
| } else { |
| omitImplicitChecksTest(); |
| } |
| } |
| |
| complianceModeTest() { |
| var f = Foo(42); |
| expect(js_util.getProperty<int>(f, 'a'), equals(42)); |
| expect(() => js_util.getProperty<List>(f, 'a'), throws); |
| |
| f.a = 5; |
| expect(js_util.callMethod<int>(f, 'bar', []), equals(5)); |
| expect(() => js_util.callMethod<List>(f, 'bar', []), throws); |
| |
| // Check optimized lowering of callMethod. |
| expect(() => js_util.callMethod<List>(f, 'bar', [1]), throws); |
| expect(() => js_util.callMethod<List>(f, 'bar', [1, 2]), throws); |
| expect(() => js_util.callMethod<List>(f, 'bar', [1, 2, 3]), throws); |
| expect(() => js_util.callMethod<List>(f, 'bar', [1, 2, 3, 4]), throws); |
| expect(() => js_util.callMethod<List>(f, 'bar', [1, 2, 3, 4, 5]), throws); |
| |
| var f2 = Foo(7); |
| var fConstructor = js_util.getProperty(f, 'constructor'); |
| expect(js_util.callConstructor<Foo>(fConstructor, [7]).a, equals(7)); |
| expect(() => js_util.callConstructor<List>(fConstructor, [7]), throws); |
| |
| // Check optimized lowering of callConstructor. |
| expect(() => js_util.callConstructor<List>(fConstructor, null), throws); |
| expect(() => js_util.callConstructor<List>(fConstructor, []), throws); |
| expect(() => js_util.callConstructor<List>(fConstructor, [1, 2]), throws); |
| expect(() => js_util.callConstructor<List>(fConstructor, [1, 2, 3]), throws); |
| expect( |
| () => js_util.callConstructor<List>(fConstructor, [1, 2, 3, 4]), throws); |
| expect(() => js_util.callConstructor<List>(fConstructor, [1, 2, 3, 4, 5]), |
| throws); |
| } |
| |
| omitImplicitChecksTest() { |
| var f = Foo(42); |
| expect(js_util.getProperty<int>(f, 'a'), equals(42)); |
| expect(js_util.getProperty<List>(f, 'a'), equals(42)); |
| |
| f.a = 5; |
| expect(js_util.callMethod<int>(f, 'bar', []), equals(5)); |
| expect(js_util.callMethod<List>(f, 'bar', []), equals(5)); |
| |
| // Check optimized lowering of callMethod. |
| expect(js_util.callMethod<List>(f, 'bar', [1]), equals(5)); |
| expect(js_util.callMethod<List>(f, 'bar', [1, 2]), equals(5)); |
| expect(js_util.callMethod<List>(f, 'bar', [1, 2, 3]), equals(5)); |
| expect(js_util.callMethod<List>(f, 'bar', [1, 2, 3, 4]), equals(5)); |
| expect(js_util.callMethod<List>(f, 'bar', [1, 2, 3, 4, 5]), equals(5)); |
| |
| var fConstructor = js_util.getProperty(f, 'constructor'); |
| expect(js_util.callConstructor<Foo>(fConstructor, [7]).a, equals(7)); |
| expect( |
| (js_util.callConstructor<List>(fConstructor, [7]) as Foo).a, equals(7)); |
| |
| // Check optimized lowering of callConstructor. |
| expect((js_util.callConstructor<List>(fConstructor, null) as Foo).a, |
| equals(null)); |
| expect( |
| (js_util.callConstructor<List>(fConstructor, []) as Foo).a, equals(null)); |
| expect((js_util.callConstructor<List>(fConstructor, [1, 2]) as Foo).a, |
| equals(1)); |
| expect((js_util.callConstructor<List>(fConstructor, [1, 2, 3]) as Foo).a, |
| equals(1)); |
| expect((js_util.callConstructor<List>(fConstructor, [1, 2, 3, 4]) as Foo).a, |
| equals(1)); |
| expect( |
| (js_util.callConstructor<List>(fConstructor, [1, 2, 3, 4, 5]) as Foo).a, |
| equals(1)); |
| } |