Roll Observatory packages and add a roll script

packages/analyzer/test/generated/java_io_test.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 engine.java_io_test;
+
+import 'package:analyzer/src/generated/java_io.dart';
+import 'package:unittest/unittest.dart';
+
+import '../utils.dart';
+
+main() {
+  initializeTestEnvironment();
+  group('JavaFile', () {
+    group('toURI', () {
+      test('forAbsolute', () {
+        String tempPath = '/temp';
+        String path = JavaFile.pathContext.join(tempPath, 'foo.dart');
+        // we use an absolute path
+        expect(JavaFile.pathContext.isAbsolute(path), isTrue,
+            reason: '"$path" is not absolute');
+        // test that toURI() returns an absolute URI
+        Uri uri = new JavaFile(path).toURI();
+        expect(uri.isAbsolute, isTrue);
+        expect(uri.scheme, 'file');
+      });
+      test('forRelative', () {
+        String tempPath = '/temp';
+        String path = JavaFile.pathContext.join(tempPath, 'foo.dart');
+        expect(JavaFile.pathContext.isAbsolute(path), isTrue,
+            reason: '"$path" is not absolute');
+        // prepare a relative path
+        // We should not check that "relPath" is actually relative -
+        // it may be not on Windows, if "temp" is on other disk.
+        String relPath = JavaFile.pathContext.relative(path);
+        // test that toURI() returns an absolute URI
+        Uri uri = new JavaFile(relPath).toURI();
+        expect(uri.isAbsolute, isTrue);
+        expect(uri.scheme, 'file');
+      });
+    });
+  });
+}