dart-sdk/tests/language/string/interpolation7_test.dart
Robert Nystrom 1b2454b85e Migrate language_2/string to null safety.
Change-Id: Ib09f268c8a8edffba007cdd4962550a5e78ff808
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151090
Reviewed-by: Erik Ernst <eernst@google.com>
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Auto-Submit: Bob Nystrom <rnystrom@google.com>
2020-06-17 21:14:43 +00:00

29 lines
640 B
Dart

// Copyright (c) 2011, 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.
import "package:expect/expect.dart";
// Dart test program testing string interpolation with toString on custom
// classes and on null.
class A {
const A();
String toString() {
return "A";
}
}
class StringInterpolation7Test {
static testMain() {
A? a = new A();
Expect.equals("A + A", "$a + $a");
a = null;
Expect.equals("null", "$a");
}
}
main() {
StringInterpolation7Test.testMain();
}