// 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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import 'dart:convert';
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import 'package:test/test.dart';
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final isCastError = const TypeMatcher<CastError>();
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final throwsCastError = throwsA(isCastError);
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T roundTripObject<T>(T object, T factory(Map<String, dynamic> json)) {
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final data = loudEncode(object);
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final object2 = factory(json.decode(data) as Map<String, dynamic>);
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expect(object2, equals(object));
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final json2 = loudEncode(object2);
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expect(json2, equals(data));
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return object2;
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}
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/// Prints out nested causes before throwing `JsonUnsupportedObjectError`.
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String loudEncode(Object object) {
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try {
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return const JsonEncoder.withIndent(' ').convert(object);
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} on JsonUnsupportedObjectError catch (e) {
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var error = e;
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do {
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final cause = error.cause;
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print(cause);
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error = (cause is JsonUnsupportedObjectError) ? cause : null;
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} while (error != null);
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rethrow;
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}
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}
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