public function testAddStyle()
 {
     $this->res->addStyle('body { background: black; }', 0, 'testAddStyle')->addStyle('body { text-color: black; }', 0, 'testAddStyle');
     $smarty = CRM_Core_Smarty::singleton();
     $actual = $smarty->fetch('string:{crmRegion name=testAddStyle}{/crmRegion}');
     $expected = "" . "<style type=\"text/css\">\nbody { background: black; }\n</style>\n" . "<style type=\"text/css\">\nbody { text-color: black; }\n</style>\n";
     $this->assertEquals($expected, $actual);
 }