Add stacktrace_test

tests/compiler/dart2js/sourcemaps/lax_json_test.dart

+// Copyright (c) 2016, 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 'package:unittest/unittest.dart';
+import 'lax_json.dart';
+
+void main() {
+  test('primitives', () {
+    expect(decode('true'), equals(true));
+    expect(decode(' true'), equals(true));
+    expect(decode('true '), equals(true));
+    expect(decode('true// '), equals(true));
+    expect(decode('// \ntrue'), equals(true));
+    expect(decode('\ttrue\r'), equals(true));
+    expect(decode('\t\ntrue\r\n'), equals(true));
+    expect(decode('true/* */'), equals(true));
+    expect(decode('/* */true'), equals(true));
+    expect(decode('/* false */true '), equals(true));
+
+    expect(decode('false'), equals(false));
+    expect(decode('null'), equals(null));
+  });
+
+  test('string', () {
+    expect(decode('"foo"'), equals("foo"));
+    expect(decode('"foo bar baz"'), equals("foo bar baz"));
+    expect(decode(r'"\""'), equals(r'"'));
+    expect(decode(r'"\\"'), equals(r'\'));
+    expect(decode(r'"\/"'), equals('/'));
+    expect(decode(r'"\b"'), equals('\b'));
+    expect(decode(r'"\f"'), equals('\f'));
+    expect(decode(r'"\r"'), equals('\r'));
+    expect(decode(r'"\n"'), equals('\n'));
+    expect(decode(r'"\t"'), equals('\t'));
+    expect(decode(r'"\t\"\\\/\f\nfoo\r\t"'), equals('\t\"\\/\f\nfoo\r\t'));
+  });
+
+  test('list', () {
+    expect(decode('[]'), equals([]));
+    expect(decode('[\n]'), equals([]));
+    expect(decode('["foo"]'), equals(['foo']));
+    expect(decode('["foo",]'), equals(['foo']));
+    expect(decode('["foo", "bar", true, \nnull\n,false,]'),
+        equals(['foo', 'bar', true, null, false]));
+  });
+
+  test('map', () {
+    expect(decode('{}'), equals({}));
+    expect(decode('{\n}'), equals({}));
+    expect(decode('{"foo":"bar"}'), equals({'foo': 'bar'}));
+    expect(decode('{"foo":"bar",}'), equals({'foo': 'bar'}));
+    expect(
+        decode(
+            '{"foo":true, "bar": false, "baz": true, '
+                '"boz": \nnull\n,"qux": false,}'),
+        equals({
+          'foo': true,
+          'bar': false,
+          'baz': true,
+          'boz': null,
+          'qux': false
+        }));
+  });
+}