Adding tests for final methods

tests/classes/abstract_final.phpt

@@ -0,0 +1,16 @@
+--TEST--
+A final method cannot be abstract
+--SKIPIF--
+<?php if (version_compare(zend_version(), '2.0.0-dev', '<')) die('skip ZendEngine 2 needed'); ?>
+--FILE--
+<?php
+
+class fail {
+	abstract final function show();
+}
+
+echo "Done\n"; // Shouldn't be displayed
+?>
+--EXPECTF--
+
+Fatal error: Cannot use the final modifier on an abstract class member in %s on line %d

tests/classes/final.phpt

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+--TEST--
+A method may be redeclared final
+--SKIPIF--
+<?php if (version_compare(zend_version(), '2.0.0-dev', '<')) die('skip ZendEngine 2 needed'); ?>
+--FILE--
+<?php
+
+class first {
+	function show() {
+		echo "Call to function first::show()\n";
+	}
+}
+
+$t = new first();
+$t->show();
+
+class second extends first {
+	final function show() {
+		echo "Call to function second::show()\n";
+	}
+}
+
+$t2 = new second();
+$t2->show();
+
+echo "Done\n";
+?>
+--EXPECTF--
+Call to function first::show()
+Call to function second::show()
+Done

tests/classes/final_abstract.phpt

@@ -0,0 +1,16 @@
+--TEST--
+A final method cannot be abstract
+--SKIPIF--
+<?php if (version_compare(zend_version(), '2.0.0-dev', '<')) die('skip ZendEngine 2 needed'); ?>
+--FILE--
+<?php
+
+class fail {
+	final abstract function show();
+}
+
+echo "Done\n"; // Shouldn't be displayed
+?>
+--EXPECTF--
+
+Fatal error: Cannot use the final modifier on an abstract class member in %s

tests/classes/final_redeclare.phpt

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+--TEST--
+A final method may not be overwritten
+--SKIPIF--
+<?php if (version_compare(zend_version(), '2.0.0-dev', '<')) die('skip ZendEngine 2 needed'); ?>
+--FILE--
+<?php
+
+class pass {
+	final function show() {
+		echo "Call to function pass::show()\n";
+	}
+}
+
+$t = new pass();
+$t->show();
+
+class fail extends pass {
+	function show() {
+		echo "Call to function fail::show()\n";
+	}
+}
+
+echo "Done\n"; // Shouldn't be displayed
+?>
+--EXPECTF--
+Call to function pass::show()
+
+Fatal error: Cannot override final method pass::show() in %s on line %d