function test_deleteAll() { //Arrange $patron_name = "Hannibal"; $test_patron = new Patron($patron_name); $test_patron->save(); $patron_name2 = "Johnny"; $test_patron2 = new Patron($patron_name2); $test_patron2->save(); //Act Patron::deleteALl(); $result = Patron::getAll(); //Assert $this->assertEquals([], $result); }