import hashlib import json import re import shutil from contextlib import contextmanager from pathlib import Path import pytest from . import report UI_TESTS_DIR = Path(__file__).parent.resolve() HASH_FILE = UI_TESTS_DIR / "fixtures.json" HASHES = {} def get_test_name(node_id): # Test item name is usually function name, but when parametrization is used, # parameters are also part of the name. Some functions have very long parameter # names (tx hashes etc) that run out of maximum allowable filename length, so # we limit the name to first 100 chars. This is not a problem with txhashes. new_name = node_id.replace("tests/device_tests/", "") # remove ::TestClass:: if present because it is usually the same as the test file name new_name = re.sub(r"::.*?::", "-", new_name) new_name = new_name.replace("/", "-") # in case there is "/" return new_name[:100] def _process_recorded(screen_path, test_name): # calculate hash HASHES[test_name] = _hash_files(screen_path) _rename_records(screen_path) def _rename_records(screen_path): # rename screenshots for index, record in enumerate(sorted(screen_path.iterdir())): record.replace(screen_path / f"{index:08}.png") def _hash_files(path): files = path.iterdir() hasher = hashlib.sha256() for file in sorted(files): hasher.update(file.read_bytes()) return hasher.digest().hex() def _process_tested(fixture_test_path, test_name): expected_hash = HASHES.get(test_name) if expected_hash is None: raise ValueError("Hash for '%s' not found in fixtures.json" % test_name) actual_path = fixture_test_path / "actual" actual_hash = _hash_files(actual_path) _rename_records(actual_path) if actual_hash != expected_hash: file_path = report.failed( fixture_test_path, test_name, actual_hash, expected_hash ) pytest.fail( "Hash of {} differs.\nExpected: {}\nActual: {}\nDiff file: {}".format( test_name, expected_hash, actual_hash, file_path ) ) else: report.passed(fixture_test_path, test_name, actual_hash) @contextmanager def screen_recording(client, request): test_ui = request.config.getoption("ui") test_name = get_test_name(request.node.nodeid) screens_test_path = UI_TESTS_DIR / "screens" / test_name if test_ui == "record": screen_path = screens_test_path / "recorded" elif test_ui == "test": screen_path = screens_test_path / "actual" else: raise ValueError("Invalid 'ui' option.") if not screens_test_path.exists(): screens_test_path.mkdir() # remove previous files shutil.rmtree(screen_path, ignore_errors=True) screen_path.mkdir() try: client.debug.start_recording(str(screen_path)) yield finally: client.debug.stop_recording() if test_ui == "record": _process_recorded(screen_path, test_name) elif test_ui == "test": _process_tested(screens_test_path, test_name) else: raise ValueError("Invalid 'ui' option.") def read_fixtures(): if not HASH_FILE.exists(): raise ValueError("File fixtures.json not found.") global HASHES HASHES = json.loads(HASH_FILE.read_text()) def write_fixtures(): HASH_FILE.write_text(json.dumps(HASHES, indent="", sort_keys=True) + "\n")