arrow2 0.18.0

Unofficial implementation of Apache Arrow spec in safe Rust
Documentation 
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use arrow2::{
    array::{
        growable::{Growable, GrowableNull},
        NullArray,
    },
    datatypes::DataType,
};

#[test]
fn null() {
    let mut mutable = GrowableNull::default();

    mutable.extend(0, 1, 2);
    mutable.extend(1, 0, 1);
    assert_eq!(mutable.len(), 3);

    let result: NullArray = mutable.into();

    let expected = NullArray::new(DataType::Null, 3);
    assert_eq!(result, expected);
}