Add test to validate SourceSpan values for nodes
Preparing for https://github.com/dart-lang/yaml/issues/51
diff --git a/test/span_test.dart b/test/span_test.dart
new file mode 100644
index 0000000..7ef61d3
--- /dev/null
+++ b/test/span_test.dart
@@ -0,0 +1,89 @@
+// 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.
+
+import 'dart:convert';
+
+import 'package:source_span/source_span.dart';
+import 'package:test/test.dart';
+import 'package:yaml/yaml.dart';
+
+void _expectSpan(SourceSpan source, String expected) {
+ final result = source.message('message');
+ printOnFailure("r'''\n$result'''");
+
+ expect(result, expected);
+}
+
+void main() {
+ YamlMap yaml;
+
+ setUpAll(() {
+ yaml = loadYaml(const JsonEncoder.withIndent(' ').convert({
+ 'num': 42,
+ 'nested': {
+ 'null': null,
+ 'num': 42,
+ },
+ 'null': null,
+ })) as YamlMap;
+ });
+
+ test('first root key', () {
+ _expectSpan(
+ yaml.nodes['num'].span,
+ r'''
+line 2, column 9: message
+ ╷
+2 │ "num": 42,
+ │ ^^
+ ╵''',
+ );
+ });
+
+ test('first root key', () {
+ _expectSpan(
+ yaml.nodes['null'].span,
+ r'''
+line 7, column 10: message
+ ╷
+7 │ "null": null
+ │ ^^^^
+ ╵''',
+ );
+ });
+
+ group('nested', () {
+ YamlMap nestedMap;
+
+ setUpAll(() {
+ nestedMap = yaml.nodes['nested'] as YamlMap;
+ });
+
+ test('first root key', () {
+ _expectSpan(
+ nestedMap.nodes['null'].span,
+ r'''
+line 4, column 11: message
+ ╷
+4 │ "null": null,
+ │ ^^^^
+ ╵''',
+ );
+ });
+
+ test('first root key', () {
+ _expectSpan(
+ nestedMap.nodes['num'].span,
+ r'''
+line 5, column 10: message
+ ╷
+5 │ "num": 42
+ │ ┌──────────^
+6 │ │ },
+ │ └─^
+ ╵''',
+ );
+ });
+ });
+}
