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# -*- coding: utf-8 -*- |
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# ----------------------------------------------------------------------------- |
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# Copyright (c) 2015 Yann Lanthony |
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# Copyright (c) 2017-2018 Spyder Project Contributors |
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# |
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# Licensed under the terms of the MIT License |
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# (See LICENSE.txt for details) |
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# ----------------------------------------------------------------------------- |
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"""Test qtsass cli.""" |
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from __future__ import absolute_import |
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# Standard library imports |
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from os.path import dirname, exists |
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import os |
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import shutil |
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import sys |
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import time |
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# Third party imports |
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import pytest |
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# Local imports |
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#Local imports |
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from qtsass import compile_filename |
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from qtsass.watchers import PollingWatcher, QtWatcher |
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from qtsass.watchers.api import retry |
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# Local imports |
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from . import EXAMPLES_DIR, await_condition, example, touch |
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class CallCounter(object): |
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def __init__(self): |
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self.count = 0 |
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def __call__(self, *args, **kwargs): |
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self.count += 1 |
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@pytest.mark.parametrize( |
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'Watcher', (PollingWatcher, QtWatcher), |
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) |
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def test_watchers(Watcher, tmpdir): |
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"""Stress test Watcher implementations""" |
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# Skip when QtWatcher is None - when Qt is not installed. |
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if not Watcher: |
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return |
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watch_dir = tmpdir.join('src').strpath |
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os.makedirs(watch_dir) |
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shutil.copy2(example('dummy.scss'), watch_dir) |
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input = tmpdir.join('src/dummy.scss').strpath |
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output = tmpdir.join('build/dummy.css').strpath |
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output_exists = lambda: exists(output) |
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c = CallCounter() |
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w = Watcher( |
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watch_dir=watch_dir, |
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compiler=compile_filename, |
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args=(input, output), |
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) |
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w.connect(c) |
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# Output should not yet exist |
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assert not exists(output) |
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w.start() |
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touch(input) |
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time.sleep(0.5) |
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if not await_condition(output_exists): |
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assert False, 'Output file not created...' |
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# Removing the watch_dir should not kill the Watcher |
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# simply stop dispatching callbacks |
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shutil.rmtree(watch_dir) |
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time.sleep(0.5) |
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assert c.count == 1 |
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# Watcher should recover once the input file is there again |
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os.makedirs(watch_dir) |
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shutil.copy2(example('dummy.scss'), watch_dir) |
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time.sleep(0.5) |
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assert c.count == 2 |
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# Stop watcher |
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w.stop() |
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w.join() |
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for _ in range(5): |
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touch(input) |
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# Count should not change |
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assert c.count == 2 |
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@pytest.mark.skipif(sys.platform.startswith('linux') or not QtWatcher, |
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reason="Fails on linux") |
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def test_qtwatcher(tmpdir): |
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"""Test QtWatcher implementation.""" |
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# Constructing a QApplication will cause the QtWatcher constructed |
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# below to use a Signal to dispatch callbacks. |
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from qtsass.watchers.qt import QApplication |
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qt_app = QApplication.instance() |
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if not qt_app: |
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qt_app = QApplication([]) |
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watch_dir = tmpdir.join('src').strpath |
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os.makedirs(watch_dir) |
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shutil.copy2(example('dummy.scss'), watch_dir) |
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input = tmpdir.join('src/dummy.scss').strpath |
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output = tmpdir.join('build/dummy.css').strpath |
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output_exists = lambda: exists(output) |
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c = CallCounter() |
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w = QtWatcher( |
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watch_dir=watch_dir, |
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compiler=compile_filename, |
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args=(input, output), |
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) |
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# We connect a counter directly to the Watcher's Qt Signal in order to |
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# verify that the Watcher is actually using a Qt Signal. |
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w.qtdispatcher.signal.connect(c) |
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w.start() |
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touch(input) |
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time.sleep(0.5) |
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if not await_condition(output_exists, qt_app=qt_app): |
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assert False, 'Output file not created...' |
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assert c.count == 1 |
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# Stop watcher |
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w.stop() |
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w.join() |
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def test_retry(): |
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"""Test retry decorator""" |
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@retry(5, interval=0) |
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def succeeds_after(n, counter): |
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counter() |
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if n <= counter.count: |
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return True |
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raise ValueError |
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# Succeed when attempts < retries |
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assert succeeds_after(4, CallCounter()) |
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# Fails when retries < attemps |
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with pytest.raises(ValueError): |
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assert succeeds_after(6, CallCounter()) |
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@retry(5, interval=0) |
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def fails(): |
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raise ValueError |
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# Most obvious case |
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with pytest.raises(ValueError): |
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fails() |
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spyder-ide /
qtsass
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