Function testSort

ts/src/test/base/test.sort.ts:4–40

()

import testSharedMethods from '../Exchange/base/test.sharedMethods.js';

function testSort () {

    const exchange = new ccxt.Exchange ({
        'id': 'sampleexchange',
    });

    // empty array
    testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([]), []);

    // single element
    testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([ 'a' ]), [ 'a' ]);

    // already sorted (idempotent)
    testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([ 'a', 'b', 'c' ]), [ 'a', 'b', 'c' ]);

    // duplicates
    testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([ 'b', 'a', 'b', 'c' ]), [ 'a', 'b', 'b', 'c' ]);

    testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([ 'b', 'a', 'c', 'd' ]), [ 'a', 'b', 'c', 'd' ]);

    // todo 1: atm, `sort` is only meant for strings. we should update to support numerics
    // todo 2: add test for above 10, eg: 1, 2, 10, 20, 21

    // // integers (single-digit, safe for cross-language lexicographic/numeric consistency)
    // testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([ 3, 1, 2 ]), [ 1, 2, 3 ]);
    // testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([ 5, 3, 1, 4, 2 ]), [ 1, 2, 3, 4, 5 ]);
    // testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([ 0, 3, 1, 2 ]), [ 0, 1, 2, 3 ]);

    // // floats (values chosen so lexicographic order matches numeric order)
    // testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([ 1.5, 0.5, 2.5 ]), [ 0.5, 1.5, 2.5 ]);
    // testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', exchange.sort ([ 3.3, 1.1, 2.2 ]), [ 1.1, 2.2, 3.3 ]);

    // immutability - original array should not be modified
    const original = [ 'b', 'a', 'c' ];
    exchange.sort (original);
    testSharedMethods.assertDeepEqual (exchange, undefined, 'sort', original, [ 'b', 'a', 'c' ]);
}

export default testSort;