Add output_type_test

pkg/compiler/lib/src/source_file_provider.dart

 // Copyright (c) 2013, 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 source_file_provider;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'dart:math' as math;
@@ skipping 243 matching lines @@
       return out.resolve('$outPath.$extension');
     } else {
       return out.resolve(extension);
     }
   }
 
   EventSink<String> call(String name, String extension) {
     return createEventSink(name, extension);
   }
 
-  EventSink<String> createEventSink(String name, String extension) {
+  Uri createUri(String name, String extension) {
     Uri uri;
-    bool isPrimaryOutput = false;
-    // TODO (johnniwinther, sigurdm): Make a better interface for
-    // output-providers.
     if (extension == "deferred_map") {
       uri = out.resolve(name);
     } else if (name == '') {
       if (extension == 'js' || extension == 'dart') {
-        isPrimaryOutput = true;
         uri = out;
       } else if (extension == 'precompiled.js') {
         uri = computePrecompiledUri(out);
         onInfo("File ($uri) is compatible with header"
             " \"Content-Security-Policy: script-src 'self'\"");
       } else if (extension == 'js.map' || extension == 'dart.map') {
         uri = sourceMapOut;
       } else if (extension == 'info.json') {
         String outName = out.path.substring(out.path.lastIndexOf('/') + 1);
         uri = out.resolve('$outName.$extension');
       } else if (extension == 'data') {
         if (resolutionOutput == null) {
           onFailure('Serialization target unspecified.');
         }
         uri = resolutionOutput;
       } else {
         onFailure('Unknown extension: $extension');
       }
     } else {
       uri = out.resolve('$name.$extension');
     }
+    return uri;
+  }
+
+  EventSink<String> createEventSink(String name, String extension) {
+    // TODO (johnniwinther, sigurdm): Make a better interface for
+    // output-providers.
+    Uri uri = createUri(name, extension);
+    bool isPrimaryOutput = uri == out;
 
     if (uri.scheme != 'file') {
       onFailure('Unhandled scheme ${uri.scheme} in $uri.');
     }
 
     RandomAccessFile output;
     try {
       output = new File(uri.toFilePath()).openSync(mode: FileMode.WRITE);
     } on FileSystemException catch (e) {
       onFailure('$e');
@@ skipping 94 matching lines @@
           resolvedUri = file;
           break;
         }
       }
     }
     var result = await readUtf8BytesFromUri(resolvedUri);
     sourceFiles[uri] = sourceFiles[resolvedUri];
     return result;
   }
 }