Introduce ZLibInflater and ZLibDeflater to dart:io.

tests/standalone/io/zlib_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 'dart:async';
+import 'dart:io';
+import 'dart:isolate';
+
+void testZLibDeflate() {
+  test(int level, List<int> expected) {
+    var port = new ReceivePort();
+    var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+    var controller = new StreamController();
+    controller.stream.transform(new ZLibDeflater(gzip: false, level: level))
+        .reduce([], (buffer, data) {
+          buffer.addAll(data);
+          return buffer;
+        })
+        .then((data) {
+          Expect.listEquals(expected, data);
+          port.close();
+        });
+    controller.add(data);
+    controller.close();
+  }
+  test(0, [120, 1, 0, 10, 0, 245, 255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0,
+           255, 255]);
+  test(1, [120, 1, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+           255, 255]);
+  test(2, [120, 94, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+           255, 255]);
+  test(3, [120, 94, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+           255, 255]);
+  test(4, [120, 94, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+           255, 255]);
+  test(5, [120, 94, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+           255, 255]);
+  test(6, [120, 156, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+           255, 255]);
+  test(-1, [120, 156, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+            255, 255]);
+  test(7, [120, 218, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+           255, 255]);
+  test(8, [120, 218, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+           255, 255]);
+  test(9, [120, 218, 98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 0,
+           255, 255]);
+}
+
+
+void testZLibDeflateGZip() {
+  var port = new ReceivePort();
+  var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+  var controller = new StreamController();
+  controller.stream.transform(new ZLibDeflater())
+      .reduce([], (buffer, data) {
+        buffer.addAll(data);
+        return buffer;
+      })
+      .then((data) {
+        Expect.listEquals([31, 139, 8, 0, 0, 0, 0, 0, 0, 3, 98, 96, 100, 98,
+                           102, 97, 101, 99, 231, 224, 4, 0, 0, 0, 255, 255],
+                          data);
+        port.close();
+      });
+  controller.add(data);
+  controller.close();
+}
+
+void testZLibDeflateInvalidLevel() {
+  test2(gzip, level) {
+    var port = new ReceivePort();
+    try {
+      new ZLibDeflater(gzip: gzip, level: level);
+    } catch (e) {
+      port.close();
+    }
+  }
+  test(level) {
+    test2(false, level);
+    test2(true, level);
+    test2(9, level);
+  }
+  test(-2);
+  test(-20);
+  test(10);
+  test(42);
+  test(null);
+  test("9");
+}
+
+void testZLibInflate() {
+  test2(bool gzip, int level) {
+    var port = new ReceivePort();
+    var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+    var controller = new StreamController();
+    controller.stream
+      .transform(new ZLibDeflater(gzip: gzip, level: level))
+      .transform(new ZLibInflater())
+        .reduce([], (buffer, data) {
+          buffer.addAll(data);
+          return buffer;
+        })
+        .then((inflated) {
+          Expect.listEquals(data, inflated);
+          port.close();
+        });
+    controller.add(data);
+    controller.close();
+  }
+  void test(int level) {
+    test2(false, level);
+    test2(true, level);
+  }
+  for (int i = -1; i < 10; i++) {
+    test(i);
+  }
+}
+
+void main() {
+  testZLibDeflate();
+  testZLibDeflateGZip();
+  testZLibDeflateInvalidLevel();
+  testZLibInflate();
+}