]> git.pond.sub.org Git - eow/blobdiff - static/dojo-release-1.1.1/dojox/encoding/tests/compression/lzw.js
add Dojo 1.1.1
[eow] / static / dojo-release-1.1.1 / dojox / encoding / tests / compression / lzw.js
diff --git a/static/dojo-release-1.1.1/dojox/encoding/tests/compression/lzw.js b/static/dojo-release-1.1.1/dojox/encoding/tests/compression/lzw.js
new file mode 100644 (file)
index 0000000..7956a0e
--- /dev/null
@@ -0,0 +1,54 @@
+if(!dojo._hasResource["dojox.encoding.tests.compression.lzw"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.encoding.tests.compression.lzw"] = true;
+dojo.provide("dojox.encoding.tests.compression.lzw");
+dojo.require("dojox.encoding.compression.lzw");
+dojo.require("dojox.encoding.bits");
+
+(function(){
+       var msg1 = "The rain in Spain falls mainly on the plain.";
+       var msg2 = "The rain in Spain falls mainly on the plain.1";
+       var msg3 = "The rain in Spain falls mainly on the plain.ab";
+       var msg4 = "The rain in Spain falls mainly on the plain.!@#";
+       var dc = dojox.encoding.compression, dcb = dojox.encoding.bits, dcl = dc.lzw;
+       
+       var s2b = function(s){
+               var b = [];
+               for(var i = 0; i < s.length; ++i){
+                       b.push(s.charCodeAt(i));
+               }
+               return b;
+       };
+
+       var b2s = function(b){
+               var s = [];
+               dojo.forEach(b, function(c){ s.push(String.fromCharCode(c)); });
+               return s.join("");
+       };
+       
+       var encode = function(msg){
+               var x = new dcb.OutputStream(), encoder = new dcl.Encoder(128);
+               dojo.forEach(s2b(msg), function(v){ encoder.encode(v, x); });
+               encoder.flush(x);
+               console.debug("bits =", x.getWidth());
+               return x.getBuffer();
+       };
+       
+       var decode = function(n, buf){
+               var x = new dcb.InputStream(buf, buf.length * 8), decoder = new dcl.Decoder(128), t = [], w = 0;
+               while(w < n){
+                       var v = decoder.decode(x);
+                       t.push(v);
+                       w += v.length;
+               }
+               return t.join("");
+       };
+
+       tests.register("dojox.encoding.tests.compression.lzw", [
+               function testLzwMsg1(t){ t.assertEqual(msg1, decode(msg1.length, encode(msg1))); },
+               function testLzwMsg2(t){ t.assertEqual(msg2, decode(msg2.length, encode(msg2))); },
+               function testLzwMsg3(t){ t.assertEqual(msg3, decode(msg3.length, encode(msg3))); },
+               function testLzwMsg4(t){ t.assertEqual(msg4, decode(msg4.length, encode(msg4))); }
+       ]);
+})();
+
+}