Add new constructors to YamlNode subclasses.

pkg/yaml/test/yaml_node_wrapper_test.dart

+// Copyright (c) 2012, 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.
+
+library yaml.node_wrapper_test;
+
+import 'package:source_maps/source_maps.dart';
+import 'package:unittest/unittest.dart';
+import 'package:yaml/yaml.dart';
+
+main() {
+  test("YamlMap() with no sourceName", () {
+    var map = new YamlMap();
+    expect(map, isEmpty);
+    expect(map.nodes, isEmpty);
+    expect(map.span, isNullSpan(isNull));
+  });
+
+  test("YamlMap() with a sourceName", () {
+    var map = new YamlMap(sourceName: "source");
+    expect(map.span, isNullSpan("source"));
+  });
+
+  test("YamlList() with no sourceName", () {
+    var list = new YamlList();
+    expect(list, isEmpty);
+    expect(list.nodes, isEmpty);
+    expect(list.span, isNullSpan(isNull));
+  });
+
+  test("YamlList() with a sourceName", () {
+    var list = new YamlList(sourceName: "source");
+    expect(list.span, isNullSpan("source"));
+  });
+
+  test("YamlMap.wrap() with no sourceName", () {
+    var map = new YamlMap.wrap({
+      "list": [1, 2, 3],
+      "map": {
+        "foo": "bar",
+        "nested": [4, 5, 6]
+      },
+      "scalar": "value"
+    });
+
+    expect(map, equals({
+      "list": [1, 2, 3],
+      "map": {
+        "foo": "bar",
+        "nested": [4, 5, 6]
+      },
+      "scalar": "value"
+    }));
+
+    expect(map.span, isNullSpan(isNull));
+    expect(map["list"], new isInstanceOf<YamlList>());
+    expect(map["list"].nodes[0], new isInstanceOf<YamlScalar>());
+    expect(map["list"].span, isNullSpan(isNull));
+    expect(map["map"], new isInstanceOf<YamlMap>());
+    expect(map["map"].nodes["foo"], new isInstanceOf<YamlScalar>());
+    expect(map["map"]["nested"], new isInstanceOf<YamlList>());
+    expect(map["map"].span, isNullSpan(isNull));
+    expect(map.nodes["scalar"], new isInstanceOf<YamlScalar>());
+    expect(map.nodes["scalar"].value, "value");
+    expect(map.nodes["scalar"].span, isNullSpan(isNull));
+    expect(map["scalar"], "value");
+    expect(map.keys, unorderedEquals(["list", "map", "scalar"]));
+    expect(map.nodes.keys, everyElement(new isInstanceOf<YamlScalar>()));
+    expect(map.nodes[new YamlScalar.wrap("list")], equals([1, 2, 3]));
+  });
+
+  test("YamlMap.wrap() with a sourceName", () {
+    var map = new YamlMap.wrap({
+      "list": [1, 2, 3],
+      "map": {
+        "foo": "bar",
+        "nested": [4, 5, 6]
+      },
+      "scalar": "value"
+    }, sourceName: "source");
+
+    expect(map.span, isNullSpan("source"));
+    expect(map["list"].span, isNullSpan("source"));
+    expect(map["map"].span, isNullSpan("source"));
+    expect(map.nodes["scalar"].span, isNullSpan("source"));
+  });
+
+  test("YamlList.wrap() with no sourceName", () {
+    var list = new YamlList.wrap([
+      [1, 2, 3],
+      {
+        "foo": "bar",
+        "nested": [4, 5, 6]
+      },
+      "value"
+    ]);
+
+    expect(list, equals([
+      [1, 2, 3],
+      {
+        "foo": "bar",
+        "nested": [4, 5, 6]
+      },
+      "value"
+    ]));
+
+    expect(list.span, isNullSpan(isNull));
+    expect(list[0], new isInstanceOf<YamlList>());
+    expect(list[0].nodes[0], new isInstanceOf<YamlScalar>());
+    expect(list[0].span, isNullSpan(isNull));
+    expect(list[1], new isInstanceOf<YamlMap>());
+    expect(list[1].nodes["foo"], new isInstanceOf<YamlScalar>());
+    expect(list[1]["nested"], new isInstanceOf<YamlList>());
+    expect(list[1].span, isNullSpan(isNull));
+    expect(list.nodes[2], new isInstanceOf<YamlScalar>());
+    expect(list.nodes[2].value, "value");
+    expect(list.nodes[2].span, isNullSpan(isNull));
+    expect(list[2], "value");
+  });
+
+  test("YamlList.wrap() with a sourceName", () {
+    var list = new YamlList.wrap([
+      [1, 2, 3],
+      {
+        "foo": "bar",
+        "nested": [4, 5, 6]
+      },
+      "value"
+    ]);
+
+    expect(list.span, isNullSpan(isNull));
+    expect(list[0].span, isNullSpan(isNull));
+    expect(list[1].span, isNullSpan(isNull));
+    expect(list.nodes[2].span, isNullSpan(isNull));
+  });
+
+  solo_test("re-wrapped objects equal one another", () {
+    var list = new YamlList.wrap([
+      [1, 2, 3],
+      {"foo": "bar"}
+    ]);
+
+    expect(list[0] == list[0], isTrue);
+    expect(list[0].nodes == list[0].nodes, isTrue);
+    expect(list[0] == new YamlList.wrap([1, 2, 3]), isFalse);
+    expect(list[1] == list[1], isTrue);
+    expect(list[1].nodes == list[1].nodes, isTrue);
+    expect(list[1] == new YamlMap.wrap({"foo": "bar"}), isFalse);
+  });
+}
+
+Matcher isNullSpan(sourceUrl) => predicate((span) {
+  expect(span, new isInstanceOf<Span>());
+  expect(span.length, equals(0));
+  expect(span.text, isEmpty);
+  expect(span.isIdentifier, isFalse);
+  expect(span.start, equals(span.end));
+  expect(span.start.offset, equals(0));
+  expect(span.start.line, equals(0));
+  expect(span.start.column, equals(0));
+  expect(span.sourceUrl, sourceUrl);
+  return true;
+});