Subversion Repositories Applications.papyrus

if(!dojo._hasResource["dojox.encoding.tests.lzw"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.

dojo._hasResource["dojox.encoding.tests.lzw"] = true;

dojo.provide("dojox.encoding.tests.lzw");

dojo.require("dojox.encoding.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, dcb = dc.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.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))); }

	]);

})();

}