Account for fasta in subpackage_relationships_test

pkg/front_end/test/subpackage_relationships_test.dart

 // Copyright (c) 2017, 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 'dart:async';
 import 'dart:io';
 
 import 'package:front_end/compiler_options.dart';
 import 'package:front_end/dependency_grapher.dart';
 import 'package:path/path.dart' as pathos;
@@ skipping 16 matching lines @@
 final subpackageRules = {
   'lib': new SubpackageRules(
       mayImportAnalyzer: true,
       allowedDependencies: ['lib/src', 'lib/src/base']),
   'lib/src': new SubpackageRules(
       mayImportAnalyzer: true,
       allowedDependencies: ['lib', 'lib/src/base', 'lib/src/scanner']),
   'lib/src/base': new SubpackageRules(
       mayImportAnalyzer: true, allowedDependencies: ['lib']),
   'lib/src/scanner': new SubpackageRules(allowedDependencies: ['lib/src/base']),
+  'lib/src/fasta': new SubpackageRules(mayImportAnalyzer: true),

[ahe, 2017/02/01 13:40:37]

I should probably move all analyzer dependencies to lib/src/fasta/analyzer.

[Paul Berry, 2017/02/01 13:44:38]

Do you think, for purposes of the checks done by this test, we should consider
the subdirectories of fasta each as their own subpackage?

[ahe, 2017/02/01 13:52:04]

Yes, that would be nice.

 };
 
 /// Rules for what a subpackage may depend directly on.
 class SubpackageRules {
   /// Indicates whether the subpackage may directly depend on analyzer.
   final bool mayImportAnalyzer;
 
   /// Indicates which other subpackages a given subpackage may directly depend
   /// on.
   final List<String> allowedDependencies;
@@ skipping 85 matching lines @@
   ///
   /// If [src] is not part of the front end, `null` is returned.
   String subpackageForUri(Uri src) {
     if (src.scheme != 'package') return null;
     if (src.pathSegments[0] != 'front_end') return null;
     if (src.pathSegments[1] != 'src') return 'lib';
     if (src.pathSegments.length == 3) return 'lib/src';
     return 'lib/src/${src.pathSegments[2]}';
   }
 }