assertInstanceOf(TikiLib::class, TikiLib::lib('tiki')); } public function testLibShouldReturnInstanceOfCalendar(): void { $this->assertInstanceOf(CalendarLib::class, TikiLib::lib('calendar')); } public function testLibShouldReturnNullForInvalidClass(): void { $this->expectException(Exception::class); TikiLib::lib('invalidClass'); } }