Jacob Richman
88eb557b65
Update all tests Support //# multitests for better dartfmt compatibility and fewer multitest false positives All files under tests were manually updated with find . -iregex '.*\.dart$' -print0 | xargs -0 perl -pi -e 's/(\S\s+)\/\/\/ /$1\/\/# /' For now both old and new styles are allowed to accommodate CO19 tests. R=efortuna@google.com BUG= Review-Url: https://codereview.chromium.org/2765693002 . Review-Url: https://codereview.chromium.org/2765893003 .
58 lines
2.3 KiB
Dart
58 lines
2.3 KiB
Dart
// Copyright (c) 2015, 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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// Verify semantics of the ?. operator when it does not appear on the LHS of an
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// assignment.
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import "package:expect/expect.dart";
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import "conditional_access_helper.dart" as h;
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noMethod(e) => e is NoSuchMethodError;
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class B {}
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class C extends B {
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int v;
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C(this.v);
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static int staticInt;
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}
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C nullC() => null;
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main() {
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// Make sure the "none" test fails if property access using "?." is not
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// implemented. This makes status files easier to maintain.
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nullC()?.v;
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// e1?.id is equivalent to ((x) => x == null ? null : x.id)(e1).
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Expect.equals(null, nullC()?.v); //# 01: ok
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Expect.equals(1, new C(1)?.v); //# 02: ok
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// C?.id is equivalent to C.id.
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{ C.staticInt = 1; Expect.equals(1, C?.staticInt); } //# 12: ok
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{ h.C.staticInt = 1; Expect.equals(1, h.C?.staticInt); } //# 13: ok
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// The static type of e1?.d is the static type of e1.id.
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{ int i = new C(1)?.v; Expect.equals(1, i); } //# 03: ok
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{ String s = new C(null)?.v; Expect.equals(null, s); } //# 04: static type warning
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{ C.staticInt = 1; int i = C?.staticInt; Expect.equals(1, i); } //# 14: ok
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{ h.C.staticInt = 1; int i = h.C?.staticInt; Expect.equals(1, i); } //# 15: ok
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{ C.staticInt = null; String s = C?.staticInt; Expect.equals(null, s); } //# 16: static type warning
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{ h.C.staticInt = null; String s = h.C?.staticInt; Expect.equals(null, s); } //# 17: static type warning
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// Let T be the static type of e1 and let y be a fresh variable of type T.
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// Exactly the same static warnings that would be caused by y.id are also
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// generated in the case of e1?.id.
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Expect.equals(null, nullC()?.bad); //# 05: static type warning
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{ B b = new C(1); Expect.equals(1, b?.v); } //# 06: static type warning
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// '?.' cannot be used to access toplevel properties in libraries imported via
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// prefix.
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var x = h?.topLevelVar; //# 09: compile-time error
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// Nor can it be used to access the hashCode getter on the class Type.
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Expect.throws(() => C?.hashCode, noMethod); //# 10: static type warning
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Expect.throws(() => h.C?.hashCode, noMethod); //# 11: static type warning
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}
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