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2150 mathias 1 
if(!dojo._hasResource["tests._base.Deferred"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
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dojo._hasResource["tests._base.Deferred"] = true;
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dojo.provide("tests._base.Deferred");
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doh.register("tests._base.Deferred",
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	[
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		function callback(t){
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			var nd = new dojo.Deferred();
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			var cnt = 0;
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			nd.addCallback(function(res){
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				doh.debug("debug from dojo.Deferred callback");
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				return res;
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			});
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			nd.addCallback(function(res){
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				// t.debug("val:", res);
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				cnt+=res;
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				return cnt;
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			});
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			nd.callback(5);
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			// t.debug("cnt:", cnt);
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			t.assertEqual(cnt, 5);
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		},
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		function errback(t){
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			var nd = new dojo.Deferred();
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			var cnt = 0;
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			nd.addErrback(function(val){
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				return ++cnt;
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			});
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			nd.errback();
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			t.assertEqual(cnt, 1);
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		},
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		function callbackTwice(t){
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			var nd = new dojo.Deferred();
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			var cnt = 0;
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			nd.addCallback(function(res){
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				return ++cnt;
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			});
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			nd.callback();
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			t.assertEqual(cnt, 1);
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			var thrown = false;
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			try{
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				nd.callback();
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			}catch(e){
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				thrown = true;
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			}
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			t.assertTrue(thrown);
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		},
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		function addBoth(t){
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			var nd = new dojo.Deferred();
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			var cnt = 0;
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			nd.addBoth(function(res){
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				return ++cnt;
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			});
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			nd.callback();
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			t.assertEqual(cnt, 1);
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			// nd.callback();
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			// t.debug(cnt);
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			// t.assertEqual(cnt, 1);
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		}
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	]
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);
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}