| // Copyright (c) 2019, 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. |
| |
| /// @assertion A property access e?.f translates to: |
| /// SHORT[EXP(e), fn[x] => x.f] |
| /// |
| /// @description Check that a property access e?.f translates to: |
| /// SHORT[EXP(e), fn[x] => x.f] |
| /// Test e?.f?.g |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-strong |
| import "../../Utils/expect.dart"; |
| |
| class C { |
| String? test1 = "Lily was here"; |
| String? get test2 => test1; |
| } |
| |
| void testShort(C? x) { |
| var actual = x?.test1?.substring(0, 4); |
| var n0 = x; |
| var expected = null; |
| if (n0 != null) { |
| var t1 = n0.test1; |
| if (t1 != null) { |
| expected = t1.substring(0, 4); |
| } |
| } |
| Expect.equals(expected, actual); |
| |
| var actual2 = x?.test2?.length; |
| var expected2 = null; |
| if (n0 != null) { |
| var t2 = n0.test2; |
| if (t2 != null) { |
| expected2 = t2.length; |
| } |
| } |
| Expect.equals(expected2, actual2); |
| } |
| |
| main() { |
| C? c1 = null; |
| testShort(c1); |
| c1 = new C(); |
| testShort(c1); |
| if (c1 != null) { |
| c1.test1 = null; |
| testShort(c1); |
| } |
| |
| C c2 = new C(); |
| testShort(c2); |
| c2.test1 = null; |
| testShort(c2); |
| } |