Improved Mikes hack to ease testing against IE cache

build/test/data/test.html → build/test/data/test.php

@@ -3,5 +3,5 @@ html text<br/>
 testFoo = "foo"; $('#foo').html('foo');
 ok( true, "test.html executed" );
 /* ]]> */</script>
-<script src="data/test.js"></script>
+<script src="data/test.js?<?php srand(); echo time() . '' . rand(); ?>"></script>
 blabla
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build/test/data/testrunner.js

@@ -191,4 +191,17 @@ function t(a,b,c) {
 	for ( var i = 0; i < f.length; i++ )
 		s += (s && ",") + '"' + f[i].id + '"';
 	isSet(f, q.apply(q,c), a + " (" + b + ")");
+}
+
+/**
+ * Add random number to url to stop IE from caching
+ *
+ * @example url("data/test.html")
+ * @result "data/test.html?10538358428943"
+ *
+ * @example url("data/test.php?foo=bar")
+ * @result "data/test.php?foo=bar&10538358345554"
+ */
+function url(value) {
+	return value + (/\?/.test(value) ? "&" : "?") + new Date().getTime() + "" + parseInt(Math.random()*100000);
 }
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