locating runtime files automatically (fixes #96)

test/codegen_test.dart

 // Copyright (c) 2015, 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.
 
 /// Tests code generation.
 /// Runs Dart Dev Compiler on all input in the `codegen` directory and checks
 /// that the output is what we expected.
 library dev_compiler.test.codegen_test;
 
 import 'dart:io';
@@ skipping 40 matching lines @@
       : path.join(testDir, 'codegen');
   var actualDir = path.join(inputDir, 'actual');
   var paths = new Directory(inputDir)
       .listSync()
       .where((f) => f is File)
       .map((f) => f.path)
       .where((p) => p.endsWith('.dart') && filePattern.hasMatch(p));
 
   compile(String entryPoint, String sdkPath,
       {bool checkSdk: false, bool serverMode: false}) {
+    var runtimeDir = path.join(
+        path.dirname(path.dirname(Platform.script.path)), 'lib', 'runtime');
     var options = new CompilerOptions(
         outputDir: serverMode ? path.join(actualDir, 'server_mode') : actualDir,
         useColors: false,
         outputDart: dartGen,
         formatOutput: dartGen,
         emitSourceMaps: false,
         forceCompile: checkSdk,
         cheapTestFormat: checkSdk,
         checkSdk: checkSdk,
         entryPointFile: entryPoint,
         dartSdkPath: sdkPath,
+        runtimeDir: runtimeDir,
         serverMode: serverMode);
     return new Compiler(options).run();
   }
   var realSdk = getSdkDir(arguments).path;
 
   // Validate that old output is gone before running.
   // TODO(jmesserly): it'd be nice to do all cleanup here, including removing
   // pub's 'packages' symlinks which mess up the diff. That way this test
   // can be self contained instead of depending on a shell script.
   if (new Directory(actualDir).existsSync()) {
@@ skipping 136 matching lines @@
     print('[AnalysisEngine] error $message $exception');
   }
 
   @override void logError2(String message, Object exception) {
     print('[AnalysisEngine] error $message $exception');
   }
 
   void logInformation(String message, [CaughtException exception]) {}
   void logInformation2(String message, Object exception) {}
 }