Robert Nystrom
1b2454b85e
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>
27 lines
1003 B
Dart
27 lines
1003 B
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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// A null safe library cannot implement `toString()` and return `null`, but a
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// legacy library, which may be called from null safe code, can. Test that that
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// doesn't fail.
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// Requirements=nnbd-weak
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import "package:expect/expect.dart";
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import "interpolation_and_buffer_legacy_lib.dart";
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void main() {
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var n = ToStringNull();
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// Throws immediately when evaluating the first interpolated expression.
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Expect.throws<Error>(() => "$n${throw "unreachable"}");
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// Throws immediately when adding object that doesn't return a String.
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Expect.throws<Error>(
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() => StringBuffer()..write(n)..write(throw "unreachable"));
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// Same behavior for constructor argument as if adding it to buffer later.
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Expect.throws<Error>(() => StringBuffer(n)..write(throw "unreachable"));
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}
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