migrated casper/confirm tests to new test format

 /*global casper*/
 /*jshint strict:false*/
-var received;
-
-casper.setFilter('page.confirm', function(message) {
+casper.test.begin('can confirm dialog', 2, function(test) {
+    var received;
+    casper.removeAllFilters('page.confirm')
+    casper.setFilter('page.confirm', function(message) {
         received = message;
         return true;
+    });
+    casper.start('tests/site/confirm.html', function() {
+        test.assert(this.getGlobal('confirmed'), 'confirmation dialog accepted');
+    });
+    casper.run(function() {
+        test.assertEquals(received, 'are you sure?', 'confirmation message is ok');
+        test.done();
+    });
 });
 
-casper.start('tests/site/confirm.html', function() {
-    this.test.assert(this.getGlobal('confirmed'), 'confirmation dialog accepted');
-});
-
-casper.then(function() {
-    //remove the page.confirm event filter so we can add a new one
+casper.test.begin('can cancel dialog', 1, function(test) {
     casper.removeAllFilters('page.confirm')
     casper.setFilter('page.confirm', function(message) {
         return false;
     });
-});
-
-casper.thenOpen('/tests/site/confirm.html', function() {
-    this.test.assertNot(this.getGlobal('confirmed'), 'confirmation dialog canceled');
-});
-
-casper.run(function() {
-    this.test.assertEquals(received, 'are you sure?', 'confirmation message is ok');
-    this.test.done(3);
+    casper.start('tests/site/confirm.html', function() {
+        test.assertNot(this.getGlobal('confirmed'), 'confirmation dialog canceled');
+    });
+    casper.run(function() {
+        test.done();
+    });
 });