Sigmund Cherem
912005267d
Change-Id: I46be49b2effec3e38a3dc44cd45cfe736f77fa78 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/182680 Commit-Queue: Sigmund Cherem <sigmund@google.com> Reviewed-by: Joshua Litt <joshualitt@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com> Reviewed-by: Stephen Adams <sra@google.com>
70 lines
2.7 KiB
Dart
70 lines
2.7 KiB
Dart
// Copyright (c) 2020, 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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// Requirements=nnbd
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import 'dart:_rti' as rti;
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import 'dart:_foreign_helper' show JS;
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import "package:expect/expect.dart";
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const typeRulesJson = r'''
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{
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"B": {"A": []},
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"C": {"B": []}
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}
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''';
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final typeRules = JS('=Object', 'JSON.parse(#)', typeRulesJson);
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main() {
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var universe = rti.testingCreateUniverse();
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rti.testingAddRules(universe, typeRules);
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// Recipe is properly parsed
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var rti1 = rti.testingUniverseEval(universe, "@(B,{a!B,b:B,c!B})");
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// Subtype must be contravariant in its named parameter types
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var rti2 = rti.testingUniverseEval(universe, "@(B,{a!A,b:B,c!B})");
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Expect.isTrue(rti.testingIsSubtype(universe, rti2, rti1));
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rti2 = rti.testingUniverseEval(universe, "@(B,{a!B,b:A,c!B})");
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Expect.isTrue(rti.testingIsSubtype(universe, rti2, rti1));
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rti2 = rti.testingUniverseEval(universe, "@(B,{a!C,b:B,c!B})");
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Expect.isFalse(rti.testingIsSubtype(universe, rti2, rti1));
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rti2 = rti.testingUniverseEval(universe, "@(B,{a!B,b:C,c!B})");
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Expect.isFalse(rti.testingIsSubtype(universe, rti2, rti1));
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// Subtype may not omit optional named parameters
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rti2 = rti.testingUniverseEval(universe, "@(A,{a!A,c!A})");
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Expect.isFalse(rti.testingIsSubtype(universe, rti2, rti1));
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// Subtype may not omit required named parameters
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rti2 = rti.testingUniverseEval(universe, "@(A,{a!A,b:A})");
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Expect.isFalse(rti.testingIsSubtype(universe, rti2, rti1));
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// Subtype may contain additional named optional parameters
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rti2 = rti.testingUniverseEval(universe, "@(A,{a!A,b:A,c!A,d:A})");
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Expect.isTrue(rti.testingIsSubtype(universe, rti2, rti1));
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// Subtype may redeclare required parameters as optional.
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rti2 = rti.testingUniverseEval(universe, "@(A,{a:A,b:A,c:A})");
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Expect.isTrue(rti.testingIsSubtype(universe, rti2, rti1));
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// Subtype may not redeclare optional parameters as required
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rti2 = rti.testingUniverseEval(universe, "@(A,{a!A,b!A,c!A})");
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Expect.equals(
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hasUnsoundNullSafety, rti.testingIsSubtype(universe, rti2, rti1));
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// Subtype may not declare new required named parameters
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rti2 = rti.testingUniverseEval(universe, "@(A,{a!A,b:A,c!A,d!A})");
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Expect.equals(
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hasUnsoundNullSafety, rti.testingIsSubtype(universe, rti2, rti1));
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// Rti.toString() appears as expected
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Expect.equals('(B, {required B a, B b, required B c}) => dynamic',
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rti.testingRtiToString(rti1));
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// Rti debug string properly annotates all required parameters
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Expect.equals(
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2, 'required'.allMatches(rti.testingRtiToDebugString(rti1)).length);
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}
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