Function len

tests/test_class.rs:419–432

()

#[test]
fn len() {
    let gil = Python::acquire_gil();
    let py = gil.python();

    let inst = Len::create_instance(py, 10).unwrap();
    py_assert!(py, inst, "len(inst) == 10");
    unsafe {
        assert_eq!(ffi::PyObject_Size(inst.as_object().as_ptr()), 10);
        assert_eq!(ffi::PyMapping_Size(inst.as_object().as_ptr()), 10);
    }

    let inst = Len::create_instance(py, (isize::MAX as usize) + 1).unwrap();
    py_expect_exception!(py, inst, "len(inst)", OverflowError);
}

py_class!(class Iterator |py| {
    data iter: RefCell<Box<dyn iter::Iterator<Item=i32> + Send>>;