Add echo and line modes to Stdin.

tests/standalone/io/stdin_sync_test.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.
 
 import "package:path/path.dart";
 import "dart:io";
 import "dart:json";
 
-void test(String line, List<String> expected) {
-  var script = join(dirname(Platform.script), "stdin_sync_script.dart");
-  Process.start(Platform.executable,
-                [script]..addAll(
-                    expected.map(stringify))).then((process) {
-    process.stdin.write(line);
-    process.stdin.close();
-    process.stderr
-        .transform(new StringDecoder())
-        .transform(new LineTransformer())
-        .fold(new StringBuffer(), (b, d) => b..write(d))
-        .then((data) {
-          if (data.toString() != '') throw "Bad output: '$data'";
-        });
-    process.stdout
-        .transform(new StringDecoder())
-        .transform(new LineTransformer())
-        .fold(new StringBuffer(), (b, d) => b..write(d))
-        .then((data) {
-          if (data.toString() != 'true') throw "Bad output: '$data'";
-        });
-  });
-}
+void testReadByte() {
+  void test(String line, List<String> expected) {
+    var script = join(dirname(Platform.script), "stdin_sync_script.dart");
+    Process.start(Platform.executable,
+                  [script]..addAll(
+                      expected.map(stringify))).then((process) {
+      process.stdin.write(line);
+      process.stdin.close();
+      process.stderr
+          .transform(new StringDecoder())
+          .transform(new LineTransformer())
+          .fold(new StringBuffer(), (b, d) => b..write(d))
+          .then((data) {
+            if (data.toString() != '') throw "Bad output: '$data'";
+          });
+      process.stdout
+          .transform(new StringDecoder())
+          .transform(new LineTransformer())
+          .fold(new StringBuffer(), (b, d) => b..write(d))
+          .then((data) {
+            if (data.toString() != 'true') throw "Bad output: '$data'";
+          });
+    });
+  }
 
-void main() {
   test("hej\x01\x00\x0d\x0a\x0a4\x0a", ['hej\x01\x00', '', '4']);
 
   test("hej\u0187", ['hej\u0187']);
 
   test("hej\rhej\nhej\r", ['hej\rhej', 'hej\r']);
 
-  if (Platform.isWindows) {
-    // Windows trim one of the \r.
-    test("hej\r\r\r\nhej\r\nhej\r", ['hej\r', 'hej', 'hej\r']);
-  } else {
-    test("hej\r\r\nhej\r\nhej\r", ['hej\r', 'hej', 'hej\r']);
-  }
+  test("hej\r\r\nhej\r\nhej\r", ['hej\r', 'hej', 'hej\r']);
 
   test("hej", ['hej']);
 }
+
+void testEchoMode() {
+  stdin.echoMode = false;
+  var line;
+  while ((line = stdin.readLineSync()) != null) {
+    print("You typed: $line");
+  }
+}
+
+void testLineMode() {
+  stdin.lineMode = false;
+  var char;
+  while ((char = stdin.readByteSync()) != -1) {
+    print("You typed: $char");
+  }
+}
+
+
+void main() {
+  testReadByte();
+
+  // testEchoMode and testLineMode is an developer-interactive test, thus not
+  // enabled.
+  //testEchoMode();
+  //testLineMode();
+}