Function test_fn_decode

datafusion/core/tests/dataframe/dataframe_functions.rs:1241–1267

()

#[tokio::test]
async fn test_fn_decode() -> Result<()> {
    // Note that the decode function returns binary, and the default display of
    // binary is "hexadecimal" and therefore the output looks like decode did
    // nothing. So compare to a constant.
    let df_schema = DFSchema::try_from(test_schema())?;
    let expr = decode(encode(col("a"), lit("hex")), lit("hex"))
        // need to cast to utf8 otherwise the default display of binary array is hex
        // so it looks like nothing is done
        .cast_to(&DataType::Utf8, &df_schema)?;

    let batches = get_batches(expr).await?;

    assert_snapshot!(
        batches_to_string(&batches),
        @r#"
    +------------------------------------------------+
    | decode(encode(test.a,Utf8("hex")),Utf8("hex")) |
    +------------------------------------------------+
    | abcDEF                                         |
    | abc123                                         |
    | CBAdef                                         |
    | 123AbcDef                                      |
    +------------------------------------------------+
    "#);

    Ok(())
}

#[tokio::test]
async fn test_fn_array_to_string() -> Result<()> {