[ZLIB] Add support for windowBits, memLevel, raw

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 "package:async_helper/async_helper.dart";
 import "package:expect/expect.dart";
 
-void testZLibDeflate() {
-  test(int level, List<int> expected) {
-    asyncStart();
-    var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
-    var controller = new StreamController(sync: true);
-    controller.stream.transform(new ZLibEncoder(gzip: false, level: level))
-        .fold([], (buffer, data) {
-          buffer.addAll(data);
-          return buffer;
-        })
-        .then((data) {
-          Expect.listEquals(expected, data);
-          asyncEnd();
-        });
-    controller.add(data);
-    controller.close();
-  }
-  test(6, [120, 156, 99, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0, 175,
-           0, 46]);
-}
-
-
 void testZLibDeflateEmpty() {
   asyncStart();
   var controller = new StreamController(sync: true);
   controller.stream.transform(new ZLibEncoder(gzip: false, level: 6))
       .fold([], (buffer, data) {
         buffer.addAll(data);
         return buffer;
       })
       .then((data) {
         Expect.listEquals([120, 156, 3, 0, 0, 0, 0, 1], data);
         asyncEnd();
       });
   controller.close();
 }
 
+void testZLibDeflateEmptyGzip() {
+  asyncStart();
+  var controller = new StreamController(sync: true);
+  controller.stream.transform(new ZLibEncoder(gzip: true, level: 6))
+      .fold([], (buffer, data) {
+        buffer.addAll(data);
+        return buffer;
+      })
+      .then((data) {
+        Expect.listEquals([31, 139, 8, 0, 0, 0, 0, 0, 0, 3, 3, 0, 0, 0, 0, 0, 0,
+                          0, 0, 0], data);
+        asyncEnd();
+      });
+  controller.close();
+}
+
+void testZLibDeflate() {
+  asyncStart();
+  var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+  var controller = new StreamController(sync: true);
+  controller.stream.transform(new ZLibEncoder(gzip: false, level: 6))
+      .fold([], (buffer, data) {
+        buffer.addAll(data);
+        return buffer;
+      })
+      .then((data) {
+        Expect.listEquals(
+            [120, 156, 99, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0,
+            175, 0, 46],
+            data);
+        asyncEnd();
+      });
+  controller.add(data);
+  controller.close();
+}
 
 void testZLibDeflateGZip() {
   asyncStart();
   var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
   var controller = new StreamController(sync: true);
   controller.stream.transform(new ZLibEncoder(gzip: true))
       .fold([], (buffer, data) {
         buffer.addAll(data);
         return buffer;
       })
       .then((data) {
         Expect.equals(30, data.length);
         Expect.listEquals([99, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0,
                            70, 215, 108, 69, 10, 0, 0, 0],
                           // Skip header, as it can change.
                           data.sublist(10));
         asyncEnd();
       });
   controller.add(data);
   controller.close();
 }
 
+void testZLibDeflateRaw() {
+  asyncStart();
+  var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+  var controller = new StreamController(sync: true);
+  controller.stream.transform(new ZLibEncoder(raw: true, level: 6))
+      .fold([], (buffer, data) {
+        buffer.addAll(data);
+        return buffer;
+      })
+      .then((data) {
+        print(data);
+        Expect.listEquals([99, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0],
+            data);
+        asyncEnd();
+      });
+  controller.add(data);
+  controller.close();
+}
+
 void testZLibDeflateInvalidLevel() {
   test2(gzip, level) {
-    try {
-      new ZLibEncoder(gzip: gzip, level: level).startChunkedConversion(null);
-      Expect.fail("No exception thrown");
-    } catch (e) {
-    }
-  }
-  test(level) {
-    test2(false, level);
-    test2(true, level);
-    test2(9, level);
-  }
-  test(-2);
-  test(-20);
-  test(10);
-  test(42);
-  test(null);
-  test("9");
+  [true, false].forEach((gzip) {
+    [-2, -20, 10, 42, null, "9"].forEach((level) {
+      Expect.throws(
+              () => new ZLibEncoder(gzip: gzip, level: level),
+              (e) => e is ArgumentError,
+          "'level' must be in range -1..9"
+      );
+      });
+    });
+  };
 }
 
 void testZLibInflate() {
-  test2(bool gzip, int level) {
+  var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+  [true, false].forEach((gzip) {
+    [ZLibOption.STRATEGY_FILTERED, ZLibOption.STRATEGY_HUFFMAN_ONLY,
+        ZLibOption.STRATEGY_RLE, ZLibOption.STRATEGY_FIXED,
+        ZLibOption.STRATEGY_DEFAULT].forEach((strategy) {
+      [3, 6, 9].forEach((level) {
+        asyncStart();
+        var controller = new StreamController(sync: true);
+        controller.stream
+            .transform(new ZLibEncoder(gzip: gzip, level: level,
+                                       strategy: strategy))
+            .transform(new ZLibDecoder())
+            .fold([], (buffer, data) {
+              buffer.addAll(data);
+              return buffer;
+            })
+            .then((inflated) {
+              Expect.listEquals(data, inflated);
+              asyncEnd();
+            });
+        controller.add(data);
+        controller.close();
+      });
+    });
+  });
+}
+
+void testZLibInflateRaw() {
+  var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+  [3, 6, 9].forEach((level) {
     asyncStart();
-    var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
     var controller = new StreamController(sync: true);
     controller.stream
-      .transform(new ZLibEncoder(gzip: gzip, level: level))
-      .transform(new ZLibDecoder())
+        .transform(new ZLibEncoder(raw: true, level: level))
+        .transform(new ZLibDecoder(raw: true))
         .fold([], (buffer, data) {
           buffer.addAll(data);
           return buffer;
         })
         .then((inflated) {
           Expect.listEquals(data, inflated);
           asyncEnd();
         });
     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 testZLibInflateSync() {
-  test2(bool gzip, int level) {
-    var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
-    var encoded = new ZLibEncoder(gzip: gzip, level: level).convert(data);
-    var decoded = new ZLibDecoder().convert(encoded);
+  var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+  [true, false].forEach((gzip) {
+    [3, 6, 9].forEach((level) {
+      var encoded = new ZLibEncoder(gzip: gzip, level: level).convert(data);
+      var decoded = new ZLibDecoder().convert(encoded);
+      Expect.listEquals(data, decoded);
+    });
+  });
+}
+
+void testZlibInflateThrowsWithSmallerWindow() {
+  var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+  var encoder = new ZLibEncoder(windowBits: 10);
+  var encodedData = encoder.convert(data);
+  var decoder = new ZLibDecoder(windowBits: 8);
+  Expect.throws(() => decoder.convert(encodedData));
+}
+
+void testZlibInflateWithLargerWindow() {
+  var data = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+
+  [true, false].forEach((gzip) {
+    [3, 6, 9].forEach((level) {
+      asyncStart();
+      var controller = new StreamController(sync: true);
+      controller.stream
+          .transform(new ZLibEncoder(gzip: gzip, level: level, windowBits: 8))
+          .transform(new ZLibDecoder(windowBits: 10))
+          .fold([], (buffer, data) {
+            buffer.addAll(data);
+            return buffer;
+          })
+          .then((inflated) {
+            Expect.listEquals(data, inflated);
+            asyncEnd();
+          });
+      controller.add(data);
+      controller.close();
+    });
+  });
+}
+
+void testZlibWithDictionary() {
+  var dict = [102, 111, 111, 98, 97, 114];
+  var data = [98, 97, 114, 102, 111, 111];
+
+  [3, 6, 9].forEach((level) {
+    var encoded = new ZLibEncoder(level: level, dictionary: dict)
+        .convert(data);
+    var decoded = new ZLibDecoder(dictionary: dict).convert(encoded);
     Expect.listEquals(data, decoded);
-  }
-  void test(int level) {
-    test2(false, level);
-    test2(true, level);
-  }
-  for (int i = -1; i < 10; i++) {
-    test(i);
-  }
+  });
 }
 
 void main() {
   asyncStart();
   testZLibDeflate();
   testZLibDeflateEmpty();
+  testZLibDeflateEmptyGzip();
   testZLibDeflateGZip();
   testZLibDeflateInvalidLevel();
   testZLibInflate();
   testZLibInflateSync();
+  testZlibInflateThrowsWithSmallerWindow();
+  testZlibInflateWithLargerWindow();
+  testZLibDeflateRaw();
+  testZLibInflateRaw();
+  testZlibWithDictionary();
   asyncEnd();
 }