Store library paths relative to a given application root folder.

pkg/kernel/test/baseline_tester.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 'dart:io';
 
 import 'package:kernel/analyzer/loader.dart';
+import 'package:kernel/application_root.dart';
 import 'package:kernel/kernel.dart';
 import 'package:kernel/target/targets.dart';
 import 'package:kernel/text/ast_to_text.dart';
 import 'package:kernel/verifier.dart';
 import 'package:path/path.dart' as pathlib;
 import 'package:test/test.dart';
 
 final String testcaseDirectory = 'pkg/kernel/testcases';
 final String inputDirectory = 'pkg/kernel/testcases/input';
 final String sdkDirectory = 'sdk';
 
 /// A target to be used for testing.
 ///
 /// To simplify testing dependencies, we avoid transformations that rely on
 /// a patched SDK or any SDK changes that have not landed in the main SDK.
 abstract class TestTarget extends Target {
   /// Annotations to apply on the textual output.
   Annotator get annotator => null;
 
   List<String> transformProgram(Program program);
 }
 
 void runBaselineTests(String folderName, TestTarget target) {
   String outputDirectory = '$testcaseDirectory/$folderName';
   var batch = new DartLoaderBatch();
   Directory directory = new Directory(inputDirectory);
+  var applicationRoot = new ApplicationRoot(directory.absolute.path);
   for (FileSystemEntity file in directory.listSync()) {
     if (file is File && file.path.endsWith('.dart')) {
       String name = pathlib.basename(file.path);
       test(name, () async {
-        String dartPath = file.path;
+        Uri dartPath =
+            new Uri(scheme: 'file', path: pathlib.absolute(file.path));
         String shortName = pathlib.withoutExtension(name);
         String filenameOfBaseline = '$outputDirectory/$shortName.baseline.txt';
         String filenameOfCurrent = '$outputDirectory/$shortName.current.txt';
 
         var repository = new Repository();
         var loader = await batch.getLoader(
             repository,
             new DartOptions(
                 strongMode: target.strongMode,
                 sdk: sdkDirectory,
-                declaredVariables: target.extraDeclaredVariables));
+                declaredVariables: target.extraDeclaredVariables,
+                applicationRoot: applicationRoot));
         var program = loader.loadProgram(dartPath, target: target);
         verifyProgram(program);
         var errors = target.transformProgram(program);
         verifyProgram(program);
 
         var buffer = new StringBuffer();
         for (var error in errors) {
           buffer.writeln('// $error');
         }
         new Printer(buffer, annotator: target.annotator)
@@ skipping 12 matching lines @@
                 '  rm $filenameOfBaseline\n'
                 'Command to see the diff:\n'
                 '  diff -cd $outputDirectory/$shortName.{baseline,current}.txt'
                 '\n');
           }
         }
       });
     }
   }
 }