Module datasets 

Pest-style parameterized tests via the dataset! macro.

Pest in Laravel-land lets you write:

it('squares numbers', function ($n, $sq) {
    expect($n * $n)->toBe($sq);
})->with([[1, 1], [2, 4], [3, 9]]);

Rust’s #[test] is rigid about test names and arguments, so we generate a separate #[tokio::test] per row. The dataset! macro takes a base test name, a list of named cases, the parameter list, and the test body.

use anvilforge::assay::*;

dataset!(squares_numbers, [
    one      => (1, 1),
    two      => (2, 4),
    three    => (3, 9),
    negative => (-3, 9),
], |(n, sq): (i32, i32)| {
    expect(n * n).to_be(sq);
});

The closure parameter is a single tuple pattern + tuple type. Rust’s declarative macros can’t cleanly mix the case-level repetition with a per-arg parameter list, so we destructure once per generated test.

Each row becomes its own test:

• squares_numbers__one
• squares_numbers__two
• squares_numbers__three
• squares_numbers__negative

Async variants are supported by using dataset!(name, [...], async |...| { ... }).