Johnni Winther
e8683d25ed
Change-Id: Id0f96b5a2c40e37ded46c761612f2cbb8828ad18 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/161787 Reviewed-by: Dmitry Stefantsov <dmitryas@google.com> Commit-Queue: Johnni Winther <johnniwinther@google.com>
94 lines
2.3 KiB
Dart
94 lines
2.3 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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class A {
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int zero;
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int? zeroOrNull;
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A(this.zero, [this.zeroOrNull]);
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}
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int? test1(A? a) => a?.zero!;
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int? test2(A? a) => a?.zeroOrNull!;
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bool? test3(A? a) => a?.zero!.isEven;
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bool? test4(A? a) => a?.zeroOrNull!.isEven;
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class Foo {
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Bar? bar;
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Foo(this.bar);
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Bar? operator [](int? index) => index != null ? new Bar(index) : null;
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}
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class Bar {
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int baz;
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Bar(this.baz);
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int operator [](int index) => index;
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bool operator ==(Object other) => other is Bar && baz == other.baz;
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}
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Bar? test5(Foo? foo) => foo?.bar!;
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int? test6(Foo? foo) => foo?.bar!.baz;
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int? test7(Foo? foo, int baz) => foo?.bar![baz];
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Bar? test8(Foo? foo, int? bar) => foo?[bar]!;
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int? test9(Foo? foo, int? bar) => foo?[bar]!.baz;
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test10(Foo? foo, int? bar, int baz) => foo?[bar]![baz];
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main() {
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expect(0, test1(new A(0)));
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expect(null, test1(null));
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expect(0, test2(new A(0, 0)));
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expect(null, test2(null));
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throws(() => test2(new A(0, null)));
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expect(true, test3(new A(0)));
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expect(null, test3(null));
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expect(true, test4(new A(0, 0)));
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expect(null, test4(null));
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throws(() => test4(new A(0, null)));
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expect(new Bar(0), test5(new Foo(new Bar(0))));
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expect(null, test5(null));
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throws(() => test5(new Foo(null)));
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expect(0, test6(new Foo(new Bar(0))));
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expect(null, test6(null));
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throws(() => test6(new Foo(null)));
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expect(42, test7(new Foo(new Bar(0)), 42));
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expect(null, test7(null, 42));
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throws(() => test7(new Foo(null), 42));
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expect(new Bar(42), test8(new Foo(new Bar(0)), 42));
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expect(null, test8(null, 42));
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throws(() => test8(new Foo(new Bar(0)), null));
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expect(42, test9(new Foo(new Bar(0)), 42));
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expect(null, test9(null, 42));
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throws(() => test9(new Foo(new Bar(0)), null));
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expect(87, test10(new Foo(new Bar(0)), 42, 87));
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expect(null, test10(null, 42, 87));
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throws(() => test10(new Foo(new Bar(0)), null, 87));
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}
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expect(expected, actual) {
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if (expected != actual) throw 'Expected $expected, actual $actual';
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}
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throws(void Function() f) {
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try {
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f();
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} catch (_) {
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return;
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}
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throw 'Missing exception';
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}
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