How to use stop_tracing method in Playwright Python

Best Python code snippet using playwright-python

kvm_flightrecorder

Source:kvm_flightrecorder Github

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...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__':...

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test_chromium_tracing.py

Source:test_chromium_tracing.py Github

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...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()...

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tests.py

Source:tests.py Github

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...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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Playwright tutorial

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