Function test_dictionary

arrow-array/src/ffi.rs:1129–1152

()

    #[test]
    fn test_dictionary() -> Result<()> {
        // create an array natively
        let values = vec!["a", "aaa", "aaa"];
        let dict_array: DictionaryArray<Int8Type> = values.into_iter().collect();

        // export it
        let (array, schema) = to_ffi(&dict_array.to_data())?;

        // (simulate consumer) import it
        let data = unsafe { from_ffi(array, &schema) }?;
        let array = make_array(data);
        let actual = array
            .as_any()
            .downcast_ref::<DictionaryArray<Int8Type>>()
            .unwrap();

        // verify
        let new_values = vec!["a", "aaa", "aaa"];
        let expected: DictionaryArray<Int8Type> = new_values.into_iter().collect();
        assert_eq!(actual, &expected);

        // (drop/release)
        Ok(())
    }

    #[test]
    #[allow(deprecated)]