Make FileInputStream and FileOutputStream actually asynchronous.

tests/standalone/src/FileInputStreamTest.dart

Index: tests/standalone/src/FileInputStreamTest.dart
diff --git a/tests/standalone/src/FileInputStreamTest.dart b/tests/standalone/src/FileInputStreamTest.dart
index c2d2aad8b0e60ae628bb2d32a7f5a1f11d9353a1..b1858887efafa9043e469b31aa9315d745e132e2 100644
--- a/tests/standalone/src/FileInputStreamTest.dart
+++ b/tests/standalone/src/FileInputStreamTest.dart
@@ -32,7 +32,7 @@ void testInputStreamAsync() {
   InputStream x = (new File(fileName)).openInputStreamSync();
   var byteCount = 0;
   x.dataHandler = () {
-    Expect.equals(expected[byteCount],  x.read(1)[0]);
+    Expect.equals(expected[byteCount], x.read(1)[0]);
     byteCount++;
   };
   x.closeHandler = () {
@@ -68,15 +68,17 @@ void testChunkedInputStream() {
   File file = new File(fileName);
   ChunkedInputStream x = new ChunkedInputStream(file.openInputStreamSync());
   x.chunkSize = 9;
-  List<int> chunk = x.read();
-  Expect.equals(9, chunk.length);
-  x.chunkSize = 5;
-  chunk = x.read();
-  Expect.equals(5, chunk.length);
-  chunk = x.read();
-  Expect.equals(5, chunk.length);
-  chunk = x.read();
-  Expect.equals(null, chunk);
+  x.dataHandler = () {
+    List<int> chunk = x.read();
+    Expect.equals(9, chunk.length);
+    x.chunkSize = 5;

[Søren Gjesse, 2012/02/28 07:40:25]

I guess that this test is actually wrong, as the data handler callback only
ensures that 9 bytes are available. The additional reads should be in a new data
handler callback.

[Mads Ager (google), 2012/02/28 08:21:00]

Thanks. Done. 

+    chunk = x.read();
+    Expect.equals(5, chunk.length);
+    chunk = x.read();
+    Expect.equals(5, chunk.length);
+    chunk = x.read();
+    Expect.equals(null, chunk);
+  };
 }