Test a function

Test a function

Run from the repository or distribution root. Put xen on PATH, or substitute ./bin/xen.

Run

xen test examples/testing.xen

Expected output

PASS testing.doubles_a_number
PASS testing.empty_vector
2 passed; 0 failed

Complete source

testing.xen

// SPDX-License-Identifier: MIT OR Apache-2.0
fn doubled(value: Int) -> Int {
    return value * 2;
}

test fn doubles_a_number() {
    assert(doubled(3) == 6);
}

test fn empty_vector() {
    let values: Vec<Int> = [];
    assert_msg(values.len() == 0, "an empty vector has no items");
}

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