Add test for boolean and null

tests/UnitTests/TemplateSource/ValueTests/BoolenNull/BooleanNullTest.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * Smarty PHPunit tests literals true false null
+ *
+ * @package PHPunit
+ * @author  Uwe Tews
+ */
+
+/**
+ * class for {$smarty.ldelim} {$smarty.rdelim} tests
+ *
+ * @runTestsInSeparateProcess
+ * @preserveGlobalState disabled
+ * @backupStaticAttributes enabled
+ */
+class BooleanNullTest extends PHPUnit_Smarty
+{
+    public function setUp()
+    {
+        $this->setUpSmarty(dirname(__FILE__));
+    }
+
+    public function testInit()
+    {
+        $this->cleanDirs();
+    }
+    /**
+     * test true
+     *
+     */
+    public function testTrue() {
+        $this->smarty->assign('value', true);
+        $this->assertEquals('true', $this->smarty->fetch('eval:{if $value === true}true{else}false{/if}'));
+    }
+    /**
+     * test false
+     *
+     */
+    public function testFalse() {
+        $this->smarty->assign('value', false);
+        $this->assertEquals('true', $this->smarty->fetch('eval:{if $value === false}true{else}false{/if}'));
+    }
+    /**
+     * test null
+     *
+     */
+    public function testNull() {
+        $this->smarty->assign('value', null);
+        $this->assertEquals('true', $this->smarty->fetch('eval:{if $value === null}true{else}false{/if}'));
+    }
+ }