[feature/template-engine] Added a test for reuse of loop identifiers.

This currently does not pass, thus it is commented out.

The reuse appears implausible in the same file, however it may be
also done across template files where it is much harder to detect.

PHPBB3-9726

tests/template/template_test.php

@@ -295,6 +295,16 @@ class phpbb_template_template_test extends phpbb_test_case
 				array(),
 				"nonexistent = 0\n! nonexistent\n\nempty = 0\n! empty\nloop\n\nin loop",
 			),
+			/* Does not pass with the current implementation.
+			array(
+				'loop_reuse.html',
+				array(),
+				array('one' => array(array('VAR' => 'a'), array('VAR' => 'b')), 'one.one' => array(array('VAR' => 'c'), array('VAR' => 'd'))),
+				array(),
+				// Not entirely sure what should be outputted but the current output of "a" is most certainly wrong
+				"a\nb\nc\nd",
+			),
+			*/
 		);
 	}
 

tests/template/templates/loop_reuse.html

@@ -0,0 +1,6 @@
+<!-- BEGIN one -->
+	{one.VAR}
+	<!-- BEGIN one -->
+		{one.one.VAR}
+	<!-- END one -->
+<!-- END one -->