Code.gs

function test_SpotifyRequest_getFullObjByIds_limit() {
    // Mocking SpotifyRequest.getAll to avoid actual API calls and to spy on its usage.
    const originalGetAll = SpotifyRequest.getAll;
    let receivedUrls;
    SpotifyRequest.getAll = (urls) => {
        receivedUrls = urls;
        // Return a dummy response that matches the expected structure.
        return urls.map(url => {
            const ids = url.match(/ids=([^&]*)/)[1].split(',');
            return ids.map(id => ({ id: id, type: 'track' })); // Simplified dummy objects
        });
    };

    try {
        const ids = Array.from({ length: 51 }, (_, i) => `track_id_${i}`);
        const limit = 50;

        // Before the fix, the internal limit is hardcoded to 20.
        // Math.ceil(51 / 20) = 3. So, 3 URLs would be generated.
        // After the fix, the passed limit of 50 should be used.
        // Math.ceil(51 / 50) = 2. So, 2 URLs should be generated.

        SpotifyRequest.getFullObjByIds('tracks', ids, limit);

        if (!receivedUrls || receivedUrls.length !== 2) {
            throw new Error(`Test Failed: Expected 2 URLs to be generated, but got ${receivedUrls ? receivedUrls.length : 0}.`);
        }

        console.log("Test Passed: `getFullObjByIds` correctly uses the limit parameter.");

    } catch (e) {
        console.error(e.message);
    } finally {
        // Restore the original function to avoid side effects.
        SpotifyRequest.getAll = originalGetAll;
    }
}

// To run the test:
// test_SpotifyRequest_getFullObjByIds_limit();