zulip/frontend_tests/node_tests/pm_conversations.js

const pmc = zrequire('pm_conversations');

run_test('partners', () => {
    const user1_id = 1;
    const user2_id = 2;
    const user3_id = 3;

    pmc.set_partner(user1_id);
    pmc.set_partner(user3_id);

    assert.equal(pmc.is_partner(user1_id), true);
    assert.equal(pmc.is_partner(user2_id), false);
    assert.equal(pmc.is_partner(user3_id), true);
});

run_test('insert_recent_private_message', () => {
    pmc.recent.insert('1', 1001);
    pmc.recent.insert('2', 2001);
    pmc.recent.insert('1', 3001);

    // try to backdate user1's latest message
    pmc.recent.insert('1', 555);

    assert.deepEqual(pmc.recent.get(), [
        {user_ids_string: '1', max_message_id: 3001},
        {user_ids_string: '2', max_message_id: 2001},
    ]);

    assert.deepEqual(pmc.recent.get_strings(), ['1', '2']);
});