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import logging |
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import os |
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import sys |
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from functools import wraps |
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from importlib import import_module |
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from unittest.case import SkipTest |
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from six import StringIO |
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import blocks |
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from blocks.algorithms import TrainingAlgorithm |
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from blocks.config import config |
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from blocks.main_loop import MainLoop |
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from fuel.datasets import IterableDataset |
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def silence_printing(test): |
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@wraps(test) |
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def wrapper(*args, **kwargs): |
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stdout = sys.stdout |
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sys.stdout = StringIO() |
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logger = logging.getLogger(blocks.__name__) |
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old_level = logger.level |
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logger.setLevel(logging.ERROR) |
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try: |
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test(*args, **kwargs) |
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finally: |
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sys.stdout = stdout |
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logger.setLevel(old_level) |
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return wrapper |
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def skip_if_not_available(modules=None, datasets=None, configurations=None): |
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"""Raises a SkipTest exception when requirements are not met. |
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Parameters |
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---------- |
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modules : list |
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A list of strings of module names. If one of the modules fails to |
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import, the test will be skipped. |
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datasets : list |
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A list of strings of folder names. If the data path is not |
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configured, or the folder does not exist, the test is skipped. |
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configurations : list |
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A list of of strings of configuration names. If this configuration |
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is not set and does not have a default, the test will be skipped. |
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""" |
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if modules is None: |
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modules = [] |
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if datasets is None: |
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datasets = [] |
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if configurations is None: |
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configurations = [] |
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for module in modules: |
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try: |
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import_module(module) |
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except Exception: |
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raise SkipTest |
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if module == 'bokeh': |
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ConnectionError = import_module( |
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'requests.exceptions').ConnectionError |
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session = import_module('bokeh.session').Session() |
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try: |
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session.execute('get', session.base_url) |
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except ConnectionError: |
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raise SkipTest |
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if datasets and not hasattr(config, 'data_path'): |
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raise SkipTest |
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for dataset in datasets: |
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if not os.path.exists(os.path.join(config.data_path, dataset)): |
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raise SkipTest |
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for configuration in configurations: |
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if not hasattr(config, configuration): |
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raise SkipTest |
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def skip_if_configuration_set(configuration, value, message=None): |
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"""Raise SkipTest if a configuration option has a certain value. |
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Parameters |
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---------- |
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configuration : str |
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Configuration option to check. |
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value : str |
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Value of `blocks.config.<attribute>` which should cause |
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a `SkipTest` to be raised. |
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message : str, optional |
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Reason for skipping the test. |
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""" |
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if getattr(config, configuration) == value: |
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if message is not None: |
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raise SkipTest(message) |
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else: |
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raise SkipTest |
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class MockAlgorithm(TrainingAlgorithm): |
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"""An algorithm that only saves data. |
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Also checks that the initialization routine is only called once. |
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""" |
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def __init__(self): |
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self._initialized = False |
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def initialize(self): |
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assert not self._initialized |
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self._initialized = True |
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def process_batch(self, batch): |
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self.batch = batch |
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class MockMainLoop(MainLoop): |
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"""Mock main loop with mock algorithm and simple data stream. |
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Can be used with `main_loop = MagicMock(wraps=MockMainLoop())` to check |
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which calls were made. |
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""" |
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def __init__(self, **kwargs): |
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kwargs.setdefault('data_stream', |
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IterableDataset(range(10)).get_example_stream()) |
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kwargs.setdefault('algorithm', MockAlgorithm()) |
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super(MockMainLoop, self).__init__(**kwargs) |
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mila-udem /
blocks
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It is generally discouraged to redefine built-ins as this makes code very hard to read.