55 lines
1.8 KiB
JavaScript
55 lines
1.8 KiB
JavaScript
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if(!dojo._hasResource["dojox.encoding.tests.compression.lzw"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["dojox.encoding.tests.compression.lzw"] = true;
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dojo.provide("dojox.encoding.tests.compression.lzw");
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dojo.require("dojox.encoding.compression.lzw");
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dojo.require("dojox.encoding.bits");
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(function(){
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var msg1 = "The rain in Spain falls mainly on the plain.";
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var msg2 = "The rain in Spain falls mainly on the plain.1";
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var msg3 = "The rain in Spain falls mainly on the plain.ab";
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var msg4 = "The rain in Spain falls mainly on the plain.!@#";
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var dc = dojox.encoding.compression, dcb = dojox.encoding.bits, dcl = dc.lzw;
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var s2b = function(s){
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var b = [];
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for(var i = 0; i < s.length; ++i){
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b.push(s.charCodeAt(i));
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}
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return b;
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};
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var b2s = function(b){
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var s = [];
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dojo.forEach(b, function(c){ s.push(String.fromCharCode(c)); });
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return s.join("");
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};
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var encode = function(msg){
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var x = new dcb.OutputStream(), encoder = new dcl.Encoder(128);
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dojo.forEach(s2b(msg), function(v){ encoder.encode(v, x); });
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encoder.flush(x);
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console.debug("bits =", x.getWidth());
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return x.getBuffer();
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};
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var decode = function(n, buf){
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var x = new dcb.InputStream(buf, buf.length * 8), decoder = new dcl.Decoder(128), t = [], w = 0;
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while(w < n){
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var v = decoder.decode(x);
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t.push(v);
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w += v.length;
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}
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return t.join("");
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};
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tests.register("dojox.encoding.tests.compression.lzw", [
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function testLzwMsg1(t){ t.assertEqual(msg1, decode(msg1.length, encode(msg1))); },
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function testLzwMsg2(t){ t.assertEqual(msg2, decode(msg2.length, encode(msg2))); },
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function testLzwMsg3(t){ t.assertEqual(msg3, decode(msg3.length, encode(msg3))); },
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function testLzwMsg4(t){ t.assertEqual(msg4, decode(msg4.length, encode(msg4))); }
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]);
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})();
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}
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