Update the streams interfaces

tests/standalone/src/StringStreamTest.dart

+// Copyright (c) 2011, 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.
+
+class ListInputStream implements InputStream {
+  List<int> read() {
+    var result = _data;
+    _data = null;
+    return result;
+  }
+
+  void set dataHandler(void callback()) {
+    _dataHandler = callback;
+  }
+
+  void set closeHandler(void callback()) {
+    _closeHandler = callback;
+  }
+
+  void set errorHandler(void callback(int error)) {
+  }
+
+  void write(List<int> data) {
+    Expect.equals(null, _data);
+    _data = data;
+    if (_dataHandler != null) {
+      // Data handler is not called through the event loop here.
+      _dataHandler();
+    }
+  }
+
+  void close() {
+    // Close handler is not called through the event loop here.
+    if (_closeHandler != null) _closeHandler();
+  }
+
+  List<int> _data;
+  var _dataHandler;
+  var _closeHandler;
+}
+
+void testUtf8() {
+  List<int> data = [0x01,
+                    0x7f,
+                    0xc2, 0x80,
+                    0xdf, 0xbf,
+                    0xe0, 0xa0, 0x80,
+                    0xef, 0xbf, 0xbf];
+  InputStream s = new ListInputStream();
+  StringInputStream stream = new StringInputStream(s);
+  void stringData() {
+    String s = stream.read();
+    Expect.equals(6, s.length);
+    Expect.equals(new String.fromCharCodes([0x01]), s[0]);
+    Expect.equals(new String.fromCharCodes([0x7f]), s[1]);
+    Expect.equals(new String.fromCharCodes([0x80]), s[2]);
+    Expect.equals(new String.fromCharCodes([0x7ff]), s[3]);
+    Expect.equals(new String.fromCharCodes([0x800]), s[4]);
+    Expect.equals(new String.fromCharCodes([0xffff]), s[5]);
+  }
+  stream.dataHandler = stringData;
+  s.write(data);
+}
+
+void testLatin1() {
+  List<int> data = [0x01,
+                    0x7f,
+                    0x44, 0x61, 0x72, 0x74,
+                    0x80,
+                    0xff];
+  InputStream s = new ListInputStream();
+  StringInputStream stream = new StringInputStream(s, "ISO-8859-1");
+  void stringData() {
+    String s = stream.read();
+    Expect.equals(8, s.length);
+    Expect.equals(new String.fromCharCodes([0x01]), s[0]);
+    Expect.equals(new String.fromCharCodes([0x7f]), s[1]);
+    Expect.equals("Dart", s.substring(2, 6));
+    Expect.equals(new String.fromCharCodes([0x80]), s[6]);
+    Expect.equals(new String.fromCharCodes([0xff]), s[7]);
+  }
+  stream.dataHandler = stringData;
+  s.write(data);
+}
+
+void testAscii() {
+  List<int> data = [0x01,
+                    0x44, 0x61, 0x72, 0x74,
+                    0x7f];
+  InputStream s = new ListInputStream();
+  StringInputStream stream = new StringInputStream(s, "ASCII");
+  void stringData() {
+    String s = stream.read();
+    Expect.equals(6, s.length);
+    Expect.equals(new String.fromCharCodes([0x01]), s[0]);
+    Expect.equals("Dart", s.substring(1, 5));
+    Expect.equals(new String.fromCharCodes([0x7f]), s[5]);
+  }
+  stream.dataHandler = stringData;
+  s.write(data);
+}
+
+void testReadLine1() {
+  InputStream s = new ListInputStream();
+  StringInputStream stream = new StringInputStream(s);
+  var stage = 0;
+
+  void stringData() {
+    var line;
+    if (stage == 0) {
+      line = stream.readLine();
+      Expect.equals(null, line);
+      stage++;
+      s.close();
+    } else if (stage == 1) {
+      line = stream.readLine();
+      Expect.equals("Line", line);
+      line = stream.readLine();
+      Expect.equals(null, line);
+      Expect.equals(true, stream.closed);
+      stage++;
+    }
+  }
+  stream.dataHandler = stringData;
+  s.write("Line".charCodes());
+  Expect.equals(2, stage);
+}
+
+void testReadLine2() {
+  InputStream s = new ListInputStream();
+  StringInputStream stream = new StringInputStream(s);
+  var stage = 0;
+
+  void stringData() {
+    var line;
+    if (stage == 0) {
+      line = stream.readLine();
+      Expect.equals("Line1", line);
+      line = stream.readLine();
+      Expect.equals("Line2", line);
+      line = stream.readLine();
+      Expect.equals("Line3", line);
+      line = stream.readLine();
+      Expect.equals(null, line);
+      stage++;
+      s.write("ne4\n".charCodes());
+    } else if (stage == 1) {
+      line = stream.readLine();
+      Expect.equals("Line4", line);
+      line = stream.readLine();
+      Expect.equals(null, line);
+      stage++;
+      s.write("\n\n\r\n\r\n\r\r".charCodes());
+    } else if (stage == 2) {
+      // Expect 5 empty lines. As long as the stream is not closed the
+      // final \r cannot be interpreted as a end of line.
+      for (int i = 0; i < 5; i++) {
+        line = stream.readLine();
+        Expect.equals("", line);
+      }
+      line = stream.readLine();
+      Expect.equals(null, line);
+      stage++;
+      s.close();
+    } else if (stage == 3) {
+      // The final \r can not be interpreted as a end of line.
+      line = stream.readLine();
+      Expect.equals("", line);
+      line = stream.readLine();
+      Expect.equals(null, line);
+      Expect.equals(true, stream.closed);
+      stage++;
+    }
+  }
+  stream.dataHandler = stringData;
+  s.write("Line1\nLine2\r\nLine3\rLi".charCodes());
+  Expect.equals(4, stage);
+}
+
+main() {
+  testUtf8();
+  testLatin1();
+  testAscii();
+  testReadLine1();
+  testReadLine2();
+}