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How to use stop_tracing method in Playwright Python

Best Python code snippet using playwright-python

kvm_flightrecorder

Source:kvm_flightrecorder

...44    write_file(trace_path('events', subsystem, 'enable'), '1' if enable else '0')45def start_tracing():46    enable_subsystem('kvm', True)47    write_file(trace_path('tracing_on'), '1')48def stop_tracing():49    write_file(trace_path('tracing_on'), '0')50    enable_subsystem('kvm', False)51    write_file(trace_path('events', 'enable'), '0')52    write_file(trace_path('current_tracer'), 'nop')53def dump_trace():54    tracefile = open(trace_path('trace'), 'r')55    try:56        lines = True57        while lines:58            lines = tracefile.readlines(64 * 1024)59            sys.stdout.writelines(lines)60    except KeyboardInterrupt:61        pass62def tail_trace():63    try:64        for line in open(trace_path('trace_pipe'), 'r'):65            sys.stdout.write(line)66    except KeyboardInterrupt:67        pass68def usage():69    print 'Usage: %s start [buffer_size_kb] | stop | dump | tail' % sys.argv[0]70    print 'Control the KVM flight recorder tracing.'71    sys.exit(0)72def main():73    if len(sys.argv) < 2:74        usage()75    cmd = sys.argv[1]76    if cmd == '--version':77        print 'kvm_flightrecorder version 1.0'78        sys.exit(0)79    if not os.path.isdir(tracing_dir):80        print 'Unable to tracing debugfs directory, try:'81        print 'mount -t debugfs none /sys/kernel/debug'82        sys.exit(1)83    if not os.access(tracing_dir, os.W_OK):84        print 'Unable to write to tracing debugfs directory, please run as root'85        sys.exit(1)86    if cmd == 'start':87        stop_tracing() # clean up first88        if len(sys.argv) == 3:89            try:90                buffer_size_kb = int(sys.argv[2])91            except ValueError:92                print 'Invalid per-cpu trace buffer size in KB'93                sys.exit(1)94            write_file(trace_path('buffer_size_kb'), str(buffer_size_kb))95            print 'Per-CPU ring buffer size set to %d KB' % buffer_size_kb96        start_tracing()97        print 'KVM flight recorder enabled'98    elif cmd == 'stop':99        stop_tracing()100        print 'KVM flight recorder disabled'101    elif cmd == 'dump':102        dump_trace()103    elif cmd == 'tail':104        tail_trace()105    else:106        usage()107if __name__ == '__main__':...

test_chromium_tracing.py

Source:test_chromium_tracing.py

...22):23    output_file = tmpdir / "trace.json"24    await browser.start_tracing(page=page, screenshots=True, path=output_file)25    await page.goto(server.PREFIX + "/grid.html")26    await browser.stop_tracing()27    assert os.path.getsize(output_file) > 028@pytest.mark.only_browser("chromium")29async def test_should_create_directories_as_needed(30    browser: Browser, page: Page, server, tmpdir31):32    output_file = tmpdir / "these" / "are" / "directories" / "trace.json"33    await browser.start_tracing(page=page, screenshots=True, path=output_file)34    await page.goto(server.PREFIX + "/grid.html")35    await browser.stop_tracing()36    assert os.path.getsize(output_file) > 037@pytest.mark.only_browser("chromium")38async def test_should_run_with_custom_categories_if_provided(39    browser: Browser, page: Page, tmpdir: Path40):41    output_file = tmpdir / "trace.json"42    await browser.start_tracing(43        page=page,44        screenshots=True,45        path=output_file,46        categories=["disabled-by-default-v8.cpu_profiler.hires"],47    )48    await browser.stop_tracing()49    with open(output_file, mode="r") as of:50        trace_json = json.load(of)51        assert (52            "disabled-by-default-v8.cpu_profiler.hires"53            in trace_json["metadata"]["trace-config"]54        )55@pytest.mark.only_browser("chromium")56async def test_should_throw_if_tracing_on_two_pages(57    browser: Browser, page: Page, tmpdir: Path58):59    output_file_1 = tmpdir / "trace1.json"60    await browser.start_tracing(page=page, screenshots=True, path=output_file_1)61    output_file_2 = tmpdir / "trace2.json"62    with pytest.raises(Exception):63        await browser.start_tracing(page=page, screenshots=True, path=output_file_2)64    await browser.stop_tracing()65@pytest.mark.only_browser("chromium")66async def test_should_return_a_buffer(67    browser: Browser, page: Page, server, tmpdir: Path68):69    output_file = tmpdir / "trace.json"70    await browser.start_tracing(page=page, path=output_file, screenshots=True)71    await page.goto(server.PREFIX + "/grid.html")72    value = await browser.stop_tracing()73    with open(output_file, mode="r") as trace_file:74        assert trace_file.read() == value.decode()75@pytest.mark.only_browser("chromium")76async def test_should_work_without_options(browser: Browser, page: Page, server):77    await browser.start_tracing()78    await page.goto(server.PREFIX + "/grid.html")79    trace = await browser.stop_tracing()80    assert trace81@pytest.mark.only_browser("chromium")82async def test_should_support_a_buffer_without_a_path(83    browser: Browser, page: Page, server84):85    await browser.start_tracing(page=page, screenshots=True)86    await page.goto(server.PREFIX + "/grid.html")87    trace = await browser.stop_tracing()...

tests.py

Source:tests.py

...21        # on the output of read().22        content = 'A file.'23        project.start_tracing()24        self.assertEqual(render('text.txt'), 'A file.')25        trace = project.stop_tracing()26        self.assertEqual(trace.splitlines(), [27            "calling render('text.txt')",28            ". calling read('text.txt')",29        ])30        # Second check: with more interesting content, render() will31        # also call hash().32        content = 'My hash is $HASH.'33        print(project._cache)34        t = Task(read, ('text.txt',))35        print(t)36        print(t in project._cache)37        project.invalidate(t)38        project.start_tracing()39        project.rebuild()40        trace = project.stop_tracing()41        self.assertEqual(render('text.txt'), 'My hash is 28.')42        self.assertEqual(trace.splitlines(), [43            "calling read('text.txt')",44            "calling render('text.txt')",45            ". calling hash_of('text.txt')",46        ])47        # Final check: if we then remove the interesting content, does48        # Contingent recognize the hash no longer needs to be computed?49        content = 'Simple file again.'50        print(project._cache)51        t = Task(read, ('text.txt',))52        print(t)53        print(t in project._cache)54        project.invalidate(t)55        project.start_tracing()56        project.rebuild()57        trace = project.stop_tracing()58        self.assertEqual(render('text.txt'), 'Simple file again.')59        self.assertEqual(trace.splitlines(), [60            "calling read('text.txt')",61            "calling render('text.txt')",...

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