Macro assert_batches_eq

macro_rules! assert_batches_eq {
    ($EXPECTED_LINES: expr, $CHUNKS: expr) => { ... };
}

Compares formatted output of a record batch with an expected vector of strings, with the result of pretty formatting record batches. This is a macro so errors appear on the correct line

Designed so that failure output can be directly copy/pasted into the test code as expected results.

Expects to be called about like this:

assert_batch_eq!(expected_lines: &[&str], batches: &[RecordBatch])

Example

let col: ArrayRef = Arc::new(Int32Array::from(vec![1, 2]));
 let batch = RecordBatch::try_from_iter([("column", col)]).unwrap();
// Expected output is a vec of strings
let expected = vec![
    "+--------+",
    "| column |",
    "+--------+",
    "| 1      |",
    "| 2      |",
    "+--------+",
];
// compare the formatted output of the record batch with the expected output
assert_batches_eq!(expected, &[batch]);