pkg/docgen: test fixes

pkg/docgen/test/util.dart

+// Copyright (c) 2014, 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 docgen.test.util;
+
+import 'dart:convert';
 import 'dart:io';
 import 'package:path/path.dart' as p;
+import 'package:scheduled_test/descriptor.dart' as d;
+import 'package:scheduled_test/scheduled_test.dart';
+
+void scheduleTempDir() {
+  var tempDir;
+  schedule(() {
+    return Directory.systemTemp
+        .createTemp('docgen_test-')
+        .then((dir) {
+      tempDir = dir;
+      d.defaultRoot = tempDir.path;
+    });
+  });
+
+  currentSchedule.onComplete.schedule(() {
+    d.defaultRoot = null;
+    return tempDir.delete(recursive: true);
+  });
+}
 
 String getMultiLibraryCodePath() {
   var currentScript = p.fromUri(Platform.script);
   var codeDir = p.join(p.dirname(currentScript), 'multi_library_code');
 
   assert(FileSystemEntity.isDirectorySync(codeDir));
 
   return codeDir;
 }
+
+final Matcher hasSortedLines = predicate((String input) {
+  var lines = new LineSplitter().convert(input);
+
+  var sortedLines = new List.from(lines)..sort();
+
+  var orderedMatcher = orderedEquals(sortedLines);
+  return orderedMatcher.matches(lines, {});
+}, 'String has sorted lines');
+
+final Matcher isJsonMap = predicate((input) {
+  try {
+    return JSON.decode(input) is Map;
+  } catch (e) {
+    return false;
+  }
+}, 'Output is JSON encoded Map');