Update charted to 0.4.8 and roll

packages/yaml/test/yaml_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.test;
-
 import 'package:test/test.dart';
 import 'package:yaml/yaml.dart';
 
 import 'utils.dart';
 
 main() {
   var infinity = double.parse("Infinity");
   var nan = double.parse("NaN");
 
   group('has a friendly error message for', () {
     var tabError = predicate((e) =>
         e.toString().contains('Tab characters are not allowed as indentation'));
 
     test('using a tab as indentation', () {
       expect(() => loadYaml('foo:\n\tbar'),
           throwsA(tabError));
     });
 
     test('using a tab not as indentation', () {
       expect(() => loadYaml('''
           "foo
           \tbar"
           error'''),
         throwsA(isNot(tabError)));
     });
   });
 
-  group("refuses documents that declare version", () {
-    test("1.0", () {
-      expectYamlFails("""
+  group("refuses", () {
+    // Regression test for #19.
+    test("invalid contents", () {
+      expectYamlFails("{");
+    });
+
+    test("duplicate mapping keys", () {
+      expectYamlFails("{a: 1, a: 2}");
+    });
+
+    group("documents that declare version", () {
+      test("1.0", () {
+        expectYamlFails("""
          %YAML 1.0
          --- text
          """);
-    });
+      });
 
-    test("1.3", () {
-      expectYamlFails("""
-         %YAML 1.3
-         --- text
-         """);
-    });
+      test("1.3", () {
+        expectYamlFails("""
+           %YAML 1.3
+           --- text
+           """);
+      });
 
-    test("2.0", () {
-      expectYamlFails("""
-         %YAML 2.0
-         --- text
-         """);
+      test("2.0", () {
+        expectYamlFails("""
+           %YAML 2.0
+           --- text
+           """);
+      });
     });
   });
 
   test("includes source span information", () {
     var yaml = loadYamlNode(r"""
 - foo:
     bar
 - 123
-""");
+""") as YamlList;
 
     expect(yaml.span.start.line, equals(0));
     expect(yaml.span.start.column, equals(0));
     expect(yaml.span.end.line, equals(3));
     expect(yaml.span.end.column, equals(0));
 
-    var map = yaml.nodes.first;
+    var map = yaml.nodes.first as YamlMap;
     expect(map.span.start.line, equals(0));
     expect(map.span.start.column, equals(2));
     expect(map.span.end.line, equals(2));
     expect(map.span.end.column, equals(0));
 
     var key = map.nodes.keys.first;
     expect(key.span.start.line, equals(0));
     expect(key.span.start.column, equals(2));
     expect(key.span.end.line, equals(0));
     expect(key.span.end.column, equals(5));
@@ skipping 1796 matching lines @@
         A null: null
         Also a null: # Empty
         Not a null: ""
         Booleans: [ true, True, false, FALSE ]
         Integers: [ 0, 0o7, 0x3A, -19 ]
         Floats: [ 0., -0.0, .5, +12e03, -2E+05 ]
         Also floats: [ .inf, -.Inf, +.INF, .NAN ]''');
     });
   });
 }