diff --git a/tests/UnitTests/SmartyMethodsTests/RegisterCompiler/RegisterCompilerFunctionBCTest.php b/tests/UnitTests/SmartyMethodsTests/RegisterCompiler/RegisterCompilerFunctionBCTest.php
new file mode 100644
index 00000000..5783e13c
--- /dev/null
+++ b/tests/UnitTests/SmartyMethodsTests/RegisterCompiler/RegisterCompilerFunctionBCTest.php
@@ -0,0 +1,127 @@
+<?php
+/**
+ * Smarty PHPunit tests register->compilerFunction / unregister->compilerFunction methods
+ *
+ * @package PHPunit
+ * @author  Uwe Tews
+ */
+
+/**
+ * class for register->compilerFunction / unregister->compilerFunction methods tests
+ *
+ * @runTestsInSeparateProcess
+ * @preserveGlobalState disabled
+ * @backupStaticAttributes enabled
+ */
+class RegisterCompilerFunctionBCTest extends PHPUnit_Smarty
+{
+    public $loadSmartyBC = true;
+    public $loadSmarty = false;
+
+    public function setUp()
+    {
+        $this->setUpSmarty(__DIR__);
+    }
+
+
+    public function testInit()
+    {
+        $this->cleanDirs();
+    }
+    /**
+     * test register->compilerFunction method for function
+     */
+    public function testRegisterCompilerFunction()
+    {
+        $this->smartyBC->register_compiler_function('testcompilerfunction', 'mycompilerfunctionBC');
+        $this->assertEquals('mycompilerfunctionBC', $this->smartyBC->registered_plugins['compiler']['testcompilerfunction'][0]);
+        $this->assertEquals('hello world 1', $this->smartyBC->fetch('eval:{testcompilerfunction var=1}'));
+    }
+
+    /**
+     * test register->compilerFunction method for blocks
+     */
+    public function testRegisterCompilerFunctionBlock()
+    {
+        $this->smartyBC->register_compiler_function('foo', 'mycompilerfunctionBCopen');
+        $this->smartyBC->register_compiler_function('fooclose', 'mycompilerfunctionBCclose');
+        $result = $this->smartyBC->fetch('eval:{foo} hallo {/foo}');
+        $this->assertEquals('open tag hallo close tag', $result);
+    }
+
+    /**
+     * test register->compilerFunction method for static class
+     */
+    public function testRegisterCompilerFunctionClass()
+    {
+        $this->smartyBC->register_compiler_function('testcompilerfunction', array('mycompilerfunctionBCclass', 'execute'));
+        $this->assertEquals('hello world 2', $this->smartyBC->fetch('eval:{testcompilerfunction var1=2}'));
+    }
+
+    /**
+     * test register->compilerFunction method for objects
+     */
+    public function testRegisterCompilerFunctionObject()
+    {
+        $obj = new mycompilerfunctionBCclass;
+        $this->smartyBC->register_compiler_function('testcompilerfunction', array($obj, 'compile'));
+        $this->assertEquals('hello world 3', $this->smartyBC->fetch('eval:{testcompilerfunction var2=3}'));
+    }
+
+    /**
+     * test unregister->compilerFunction method
+     */
+    public function testUnregisterCompilerFunction()
+    {
+        $this->smartyBC->register_compiler_function('testcompilerfunction', 'mycompilerfunctionBC');
+        $this->smartyBC->unregister_compiler_function('testcompilerfunction');
+        $this->assertFalse(isset($this->smartyBC->registered_plugins[Smarty::PLUGIN_COMPILER]['testcompilerfunction']));
+    }
+
+    /**
+     * test unregister->compilerFunction method not registered
+     */
+    public function testUnregisterCompilerFunctionNotRegistered()
+    {
+        $this->smartyBC->unregister_compiler_function('testcompilerfunction');
+        $this->assertFalse(isset($this->smartyBC->registered_plugins[Smarty::PLUGIN_COMPILER]['testcompilerfunction']));
+    }
+
+    /**
+     * test unregister->compilerFunction method other registered
+     */
+    public function testUnregisterCompilerFunctionOtherRegistered()
+    {
+        $this->smartyBC->register_block('testcompilerfunction', 'mycompilerfunctionBC');
+        $this->smartyBC->unregister_compiler_function('testcompilerfunction');
+        $this->assertTrue(isset($this->smartyBC->registered_plugins[Smarty::PLUGIN_BLOCK]['testcompilerfunction']));
+    }
+}
+
+function mycompilerfunctionBC($params, $smarty)
+{
+    return "<?php echo 'hello world {$params['var']}';?>";
+}
+
+function mycompilerfunctionBCopen($params, $smarty)
+{
+    return "<?php echo 'open tag';?>";
+}
+
+function mycompilerfunctionBCclose($params, $smarty)
+{
+    return "<?php echo 'close tag';?>";
+}
+
+class mycompilerfunctionBCclass
+{
+    static function execute($params, $smarty)
+    {
+        return "<?php echo 'hello world {$params['var1']}';?>";
+    }
+
+    public function compile($params, $smarty)
+    {
+        return "<?php echo 'hello world {$params['var2']}';?>";
+    }
+}