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haketilo / test / haketilo_test / unit / test_broadcast.py @ aec5c9ae

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# SPDX-License-Identifier: CC0-1.0
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"""
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Haketilo unit tests - message broadcasting
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"""
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# This file is part of Haketilo
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#
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# Copyright (C) 2021, Wojtek Kosior
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the CC0 1.0 Universal License as published by
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# the Creative Commons Corporation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# CC0 1.0 Universal License for more details.
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import pytest
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from selenium.webdriver.support.ui import WebDriverWait
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from ..script_loader import load_script
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from .utils import broker_js
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test_page_html = '''
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<!DOCTYPE html>
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<script src="/testpage.js"></script>
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<h2>d0 (channel `somebodyoncetoldme`)</h2>
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<div id="d0"></div>
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<h2>d1 (channel `worldisgonnarollme`)</h2>
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<div id="d1"></div>
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<h2>d2 (both channels)</h2>
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<div id="d2"></div>
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'''
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@pytest.mark.ext_data({
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    'background_script': broker_js,
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    'test_page':         test_page_html,
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    'extra_files': {
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        'testpage.js':   lambda: load_script('common/broadcast.js')
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    }
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})
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@pytest.mark.usefixtures('webextension')
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def test_broadcast(driver, execute_in_page, wait_elem_text):
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    """
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    A test that verifies the broadcasting system based on WebExtension messaging
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    API and implemented in `background/broadcast_broker.js` and
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    `common/broadcast.js` works correctly.
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    """
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    # The broadcast facility is meant to enable message distribution between
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    # multiple contexts (e.g. different tabs/windows). Let's open the same
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    # extension's test page in a second window.
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    driver.execute_script(
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        '''
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        window.open(window.location.href, "_blank");
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        window.open(window.location.href, "_blank");
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        ''')
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    WebDriverWait(driver, 10).until(lambda d: len(d.window_handles) == 3)
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    windows = [*driver.window_handles]
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    # Let's first test if a simple message can be successfully broadcasted
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    driver.switch_to.window(windows[0])
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    execute_in_page(
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        '''
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        const divs = [0, 1, 2].map(n => document.getElementById("d" + n));
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        let appender = n => (t => divs[n].append("\\n" + `[${t[0]}, ${t[1]}]`));
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        let listener0 = listener_connection(appender(0));
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        subscribe(listener0, "somebodyoncetoldme");
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        ''')
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    driver.switch_to.window(windows[1])
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    execute_in_page(
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        '''
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        let sender0 = sender_connection();
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        out(sender0, "somebodyoncetoldme", "iaintthesharpesttool");
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        ''')
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    driver.switch_to.window(windows[0])
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    wait_elem_text('d0', '[somebodyoncetoldme, iaintthesharpesttool]')
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    # Let's add 2 more listeners
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    driver.switch_to.window(windows[0])
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    execute_in_page(
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        '''
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        let listener1 = listener_connection(appender(1));
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        subscribe(listener1, "worldisgonnarollme");
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        let listener2 = listener_connection(appender(2));
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        subscribe(listener2, "worldisgonnarollme");
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        subscribe(listener2, "somebodyoncetoldme");
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        ''')
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    # Let's send one message to one channel and one to the other. Verify they
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    # were received by the rght listeners.
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    driver.switch_to.window(windows[1])
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    execute_in_page(
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        '''
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        out(sender0, "somebodyoncetoldme", "intheshed");
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        out(sender0, "worldisgonnarollme", "shewaslooking");
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        ''')
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    driver.switch_to.window(windows[0])
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    wait_elem_text('d0', 'intheshed')
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    wait_elem_text('d1', 'shewaslooking')
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    wait_elem_text('d2', 'intheshed')
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    wait_elem_text('d2', 'shewaslooking')
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    text = execute_in_page('returnval(divs[0].innerText);')
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    assert 'shewaslooking' not in text
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    text = execute_in_page('returnval(divs[1].innerText);')
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    assert 'intheshed' not in text
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    # Let's create a second sender in third window and use it to send messages
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    # with the 'prepare' feature.
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    driver.switch_to.window(windows[2])
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    execute_in_page(
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        '''
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        let sender1 = sender_connection();
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        prepare(sender1, "somebodyoncetoldme", "kindadumb");
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        out(sender1, "worldisgonnarollme", "withherfinger");
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        ''')
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    driver.switch_to.window(windows[0])
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    wait_elem_text('d1', 'withherfinger')
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    text = execute_in_page('returnval(divs[0].innerText);')
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    assert 'kindadumb' not in text
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    driver.switch_to.window(windows[2])
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    execute_in_page('flush(sender1);')
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    driver.switch_to.window(windows[0])
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    wait_elem_text('d0', 'kindadumb')
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    # Let's verify that prepare()'d messages are properly discarded when
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    # discard() is called.
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    driver.switch_to.window(windows[2])
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    execute_in_page(
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        '''
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        prepare(sender1, "somebodyoncetoldme", "andherthumb");
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        discard(sender1);
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        prepare(sender1, "somebodyoncetoldme", "andhermiddlefinger");
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        flush(sender1);
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        ''')
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    driver.switch_to.window(windows[0])
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    wait_elem_text('d0', 'andhermiddlefinger')
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    text = execute_in_page('returnval(divs[0].innerText);')
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    assert 'andherthumb' not in text
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    # Let's verify prepare()'d messages are properly auto-flushed when the other
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    # end of the connection gets killed (e.g. because browser tab gets closed).
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    driver.switch_to.window(windows[2])
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    execute_in_page(
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        '''
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        prepare(sender1, "worldisgonnarollme", "intheshape", 500);
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        ''')
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    driver.close()
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    driver.switch_to.window(windows[0])
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    wait_elem_text('d2', 'intheshape')
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    # Verify listener's connection gets closed properly.
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    execute_in_page('close(listener0); close(listener1);')
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    driver.switch_to.window(windows[1])
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    execute_in_page('out(sender0, "worldisgonnarollme", "ofanL");')
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    execute_in_page('out(sender0, "somebodyoncetoldme", "forehead");')
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    driver.switch_to.window(windows[0])
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    wait_elem_text('d2', 'ofanL')
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    wait_elem_text('d2', 'forehead')
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    for i in (0, 1):
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        text = execute_in_page('returnval(divs[arguments[0]].innerText);', i)
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        assert 'ofanL' not in text
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        assert 'forehead' not in text
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