public function testOptionalParameterBoolean()
{
$t = new Mcall();
$this->assertFalse($t->optionalParameterBoolFalse());
$this->assertTrue($t->optionalParameterBoolTrue());
$this->assertFalse($t->optionalParameterBooleanNull());
$this->assertTrue($t->optionalParameterBooleanNull(true));
$this->assertTrue($t->optionalParameterBoolean());
$this->assertFalse($t->optionalParameterBoolean(false));
}