Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use attempt_replace method in hypothesis

Best Python code snippet using hypothesis

optimiser.py

Source:optimiser.py

...89            existing_as_int = int_from_bytes(existing)90            max_int_value = (256 ** len(existing)) - 191            if existing_as_int == max_int_value:92                continue93            def attempt_replace(v):94                """Try replacing the current block in the current best test case95                 with an integer of value i. Note that we use the *current*96                best and not the one we started with. This helps ensure that97                if we luck into a good draw when making random choices we get98                to keep the good bits."""99                if v < 0 or v > max_int_value:100                    return False101                v_as_bytes = int_to_bytes(v, len(existing))102                # We make a couple attempts at replacement. This only matters103                # if we end up growing the buffer - otherwise we exit the loop104                # early - but in the event that there *is* some randomized105                # component we want to give it a couple of tries to succeed.106                for _ in range(3):107                    attempt = self.engine.cached_test_function(108                        prefix109                        + v_as_bytes110                        + self.current_data.buffer[block.end :]111                        + bytes(BUFFER_SIZE),112                    )113                    if self.consider_new_test_data(attempt):114                        return True115                    if attempt.status < Status.INVALID or len(attempt.buffer) == len(116                        self.current_data.buffer117                    ):118                        return False119                    for i, ex in enumerate(self.current_data.examples):120                        if ex.start >= block.end:121                            break122                        if ex.end <= block.start:123                            continue124                        ex_attempt = attempt.examples[i]125                        if ex.length == ex_attempt.length:126                            continue127                        replacement = attempt.buffer[ex_attempt.start : ex_attempt.end]128                        if self.consider_new_test_data(129                            self.engine.cached_test_function(130                                prefix131                                + replacement132                                + self.current_data.buffer[ex.end :]133                            )134                        ):135                            return True136                return False137            # We unconditionally scan both upwards and downwards. The reason138            # for this is that we allow "lateral" moves that don't increase the139            # score but instead leave it constant. All else being equal we'd140            # like to leave the test case closer to shrunk, so afterwards we141            # try lowering the value towards zero even if we've just raised it.142            if not attempt_replace(max_int_value):143                find_integer(lambda k: attempt_replace(k + existing_as_int))144            existing = self.current_data.buffer[block.start : block.end]145            existing_as_int = int_from_bytes(existing)146            if not attempt_replace(0):...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.