Stephen Adams
74348ea127
Change-Id: I3b216c529b6917f4a6ea1eb8e04c147c015d0f1c Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/239601 Reviewed-by: Nicholas Shahan <nshahan@google.com> Commit-Queue: Stephen Adams <sra@google.com>
60 lines
1.9 KiB
Dart
60 lines
1.9 KiB
Dart
// Copyright (c) 2021, 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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import 'package:expect/expect.dart';
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import 'package:js_ast/js_ast.dart';
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class _DeferredStatement extends DeferredStatement {
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final Statement? _statement;
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@override
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Statement get statement => _statement!;
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_DeferredStatement(this._statement);
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}
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void main() {
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// Deferring a statement should not change how it prints.
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var undeferredStatement = js.statement('var x = 3');
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var deferredStatement = _DeferredStatement(undeferredStatement);
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Expect.equals(DebugPrint(undeferredStatement), DebugPrint(deferredStatement));
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// Printing a non-finalized DeferredStatement throws.
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Expect.throws(() => DebugPrint(_DeferredStatement(null)));
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// DeferredStatement with empty Block puts braces.
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Expect.equals(DebugPrint(_DeferredStatement(Block.empty())), '{\n}\n');
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// DeferredStatement in block with nested block gets elided.
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Expect.equals(
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DebugPrint(Block([_DeferredStatement(Block.empty())])), '{\n}\n');
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Expect.equals(
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DebugPrint(Block([
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_DeferredStatement(
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_DeferredStatement(_DeferredStatement(Block.empty())))
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])),
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'{\n}\n');
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// Nested Blocks in DeferredStatements are elided.
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Expect.equals(
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DebugPrint(
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Block([
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_DeferredStatement(
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Block([
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_DeferredStatement(Block.empty()),
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Block.empty(),
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Block([
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_DeferredStatement(Block.empty()),
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Block.empty(),
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]),
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_DeferredStatement(_DeferredStatement(Block.empty())),
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]),
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),
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]),
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),
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'{\n}\n');
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// DeferredStatement with empty Statement prints semicolon and a newline.
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Expect.equals(DebugPrint(_DeferredStatement(EmptyStatement())), ';\n');
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}
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