Robert Nystrom
ba40d9bece
Change-Id: I73edeeaf4934899b71d6335dcb4b4b54dce46bae Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/426340 Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Nate Biggs <natebiggs@google.com> Commit-Queue: Nate Biggs <natebiggs@google.com>
93 lines
3.1 KiB
Dart
93 lines
3.1 KiB
Dart
// Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:_interceptors';
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import 'package:js/js.dart';
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import 'package:expect/expect.dart';
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@JS()
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external void eval(String code);
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@JS()
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external JavaScriptSymbol symbol;
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@JS('symbol')
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external dynamic symbolDynamic;
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@JS('Symbol')
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external JavaScriptSymbol makeSymbol(String value);
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@JS()
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main() {
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const s = 'symbolValue';
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symbol = makeSymbol(s);
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/* toString */
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final toStringVal = 'Symbol($s)';
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Expect.equals(toStringVal, symbol.toString());
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Expect.equals(toStringVal, symbolDynamic.toString());
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// String interpolation
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Expect.equals(toStringVal, '$symbol');
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Expect.equals(toStringVal, '$symbolDynamic');
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// toString tear-offs
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var toStringTearoff = symbol.toString;
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Expect.type<String Function()>(toStringTearoff);
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Expect.equals(symbol.toString, toStringTearoff);
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Expect.equals(symbol.toString(), toStringTearoff());
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toStringTearoff = symbolDynamic.toString;
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Expect.type<String Function()>(toStringTearoff);
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Expect.equals(symbol.toString, toStringTearoff);
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Expect.equals(symbol.toString(), toStringTearoff());
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/* hashCode */
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// This value is allowed to change, but for lack of a better existing option,
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// we return 0.
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Expect.equals(0, symbol.hashCode);
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Expect.equals(0, symbolDynamic.hashCode);
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/* == */
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// Prefer `==` over `Expect.equals` so we can check dynamic vs non-dynamic
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// calls.
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Expect.isTrue(symbol == symbol);
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Expect.isTrue(symbolDynamic == symbol);
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// Different symbols with the same values are not equal.
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final differentSymbol = makeSymbol(s);
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Expect.isFalse(symbol == differentSymbol);
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Expect.isFalse(symbolDynamic == differentSymbol);
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/* noSuchMethod */
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final methodName = 'testMethod';
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final invocation = Invocation.method(Symbol(methodName), null);
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void testNoSuchMethodResult(noSuchMethodResult) {
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Expect.type<NoSuchMethodError>(noSuchMethodResult);
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Expect.contains(methodName, noSuchMethodResult.toString());
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}
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testNoSuchMethodResult(Expect.throws(() => symbol.noSuchMethod(invocation)));
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testNoSuchMethodResult(
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Expect.throws(() => symbolDynamic.noSuchMethod(invocation)),
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);
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var noSuchMethodTearoff = symbol.noSuchMethod;
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Expect.type<dynamic Function(Invocation)>(noSuchMethodTearoff);
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Expect.equals(symbol.noSuchMethod, noSuchMethodTearoff);
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testNoSuchMethodResult(Expect.throws(() => noSuchMethodTearoff(invocation)));
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noSuchMethodTearoff = symbolDynamic.noSuchMethod;
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Expect.type<dynamic Function(Invocation)>(noSuchMethodTearoff);
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Expect.equals(symbolDynamic.noSuchMethod, noSuchMethodTearoff);
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testNoSuchMethodResult(
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Expect.throws(
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() => noSuchMethodTearoff(Invocation.method(Symbol(methodName), null)),
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),
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);
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/* runtimeType */
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var runtimeTypeResult = symbol.runtimeType;
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Expect.type<Type>(runtimeTypeResult);
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Expect.equals(symbol.runtimeType, runtimeTypeResult);
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runtimeTypeResult = symbolDynamic.runtimeType;
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Expect.type<Type>(runtimeTypeResult);
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Expect.equals(symbolDynamic.runtimeType, runtimeTypeResult);
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}
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