tests.test_watchers.test_watchers() - Code Metrics - Inspection of "Add Watcher api" - spyder-ide/qtsass - Measure and Improve Code Quality continuously with Scrutinizer

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Pull Request — master (#44)

unknown

created 2019-09-11 23:40 UTC

tests.test_watchers.test_watchers() B

↳ Parent: tests.test_watchers

Complexity

Conditions

Size

Total Lines	56
Code Lines	35

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	35
dl	0
loc	56
rs	8.5733
c	0
b	0
f	0
cc	5
nop	2

How to fix Long Method

# -*- coding: utf-8 -*-
# -----------------------------------------------------------------------------
# Copyright (c) 2015 Yann Lanthony
# Copyright (c) 2017-2018 Spyder Project Contributors
#
# Licensed under the terms of the MIT License
# (See LICENSE.txt for details)
# -----------------------------------------------------------------------------
"""Test qtsass cli."""

from __future__ import absolute_import

# Standard library imports
import time
import os
import shutil
from os.path import dirname, exists

# Third party imports
import pytest

#Local imports
from qtsass import compile_filename
from qtsass.watchers import PollingWatcher, QtWatcher

from . import EXAMPLES_DIR, example, touch, await_condition


class CallCounter(object):

    def __init__(self):
        self.count = 0

    def __call__(self, *args, **kwargs):
        self.count += 1


@pytest.mark.parametrize(
    'Watcher', (PollingWatcher, QtWatcher),
)
def test_watchers(Watcher, tmpdir):
    """Stress test Watcher implementations"""

    # Skip when QtWatcher is None - when Qt is not installed.
    if not Watcher:
        return

    watch_dir = tmpdir.join('src').strpath
    os.makedirs(watch_dir)
    shutil.copy2(example('dummy.scss'), watch_dir)
    input = tmpdir.join('src/dummy.scss').strpath
    output = tmpdir.join('build/dummy.css').strpath
    output_exists = lambda: exists(output)


    c = CallCounter()
    w = Watcher(
        watch_dir=watch_dir,
        compiler=compile_filename,
        args=(input, output),
    )
    w.connect(c)

    # Output should not yet exist
    assert not exists(output)

    w.start()

    touch(input)
    time.sleep(0.5)
    if not await_condition(output_exists):
        assert False, 'Output file not created...'

    # Removing the watch_dir should not kill the Watcher
    # simply stop dispatching callbacks
    shutil.rmtree(watch_dir)
    time.sleep(0.5)
    assert c.count == 1

    # Watcher should recover once the input file is there again
    os.makedirs(watch_dir)
    shutil.copy2(example('dummy.scss'), watch_dir)
    time.sleep(0.5)
    assert c.count == 2

    # Stop watcher
    w.stop()
    w.join()

    for _ in range(5):
        touch(input)

    # Count should not change
    assert c.count == 2


def test_qtwatcher(tmpdir):
    """Test QtWatcher implementation"""

    # Skip when QtWatcher is None - When Qt is not installed
    if not QtWatcher:
        return

    # Constructing a QApplication will cause the QtWatcher constructed
    # below to use a Signal to dispatch callbacks.
    from qtsass.watchers.qt import QApplication

    qt_app = QApplication.instance()
    if not qt_app:
        qt_app = QApplication([])

    watch_dir = tmpdir.join('src').strpath
    os.makedirs(watch_dir)
    shutil.copy2(example('dummy.scss'), watch_dir)
    input = tmpdir.join('src/dummy.scss').strpath
    output = tmpdir.join('build/dummy.css').strpath
    output_exists = lambda: exists(output)


    c = CallCounter()
    w = QtWatcher(
        watch_dir=watch_dir.strpath,
        compiler=compile_filename,
        args=(input, output),
    )
    # We connect a counter directly to the Watcher's Qt Signal in order to
    # verify that the Watcher is actually using a Qt Signal.
    w.qtdispatcher.signal.connect(c)
    w.start()

    touch(input)
    time.sleep(0.5)
    if not await_condition(output_exists, qt_app=qt_app):
        assert False, 'Output file not created...'
    assert c.count == 1

    # Stop watcher
    w.stop()
    w.join()


1			# -- coding: utf-8 --
2			# -----------------------------------------------------------------------------
3			# Copyright (c) 2015 Yann Lanthony
4			# Copyright (c) 2017-2018 Spyder Project Contributors
5			#
6			# Licensed under the terms of the MIT License
7			# (See LICENSE.txt for details)
8			# -----------------------------------------------------------------------------
9			"""Test qtsass cli."""
10
11			from __future__ import absolute_import
12
13			# Standard library imports
14			import time
15			import os
16			import shutil
17			from os.path import dirname, exists
18
19			# Third party imports
20			import pytest
21
22			#Local imports
23			from qtsass import compile_filename
24			from qtsass.watchers import PollingWatcher, QtWatcher
25
26			from . import EXAMPLES_DIR, example, touch, await_condition
27
28
29			class CallCounter(object):
30
31			def __init__(self):
32			self.count = 0
33
34			def __call__(self, args, *kwargs):
35			self.count += 1
36
37
38			@pytest.mark.parametrize(
39			'Watcher', (PollingWatcher, QtWatcher),
40			)
41			def test_watchers(Watcher, tmpdir):
42			"""Stress test Watcher implementations"""
43
44			# Skip when QtWatcher is None - when Qt is not installed.
45			if not Watcher:
46			return
47
48			watch_dir = tmpdir.join('src').strpath
49			os.makedirs(watch_dir)
50			shutil.copy2(example('dummy.scss'), watch_dir)
51			input = tmpdir.join('src/dummy.scss').strpath
52			output = tmpdir.join('build/dummy.css').strpath
53			output_exists = lambda: exists(output)
			0 ignored issues – show introduced 2019-09-11 23:41 UTC by Report Bug Copy Issue Report The variable `output` does not seem to be defined for all execution paths. Loading history...
54
55			c = CallCounter()
56			w = Watcher(
57			watch_dir=watch_dir,
58			compiler=compile_filename,
59			args=(input, output),
60			)
61			w.connect(c)
62
63			# Output should not yet exist
64			assert not exists(output)
65
66			w.start()
67
68			touch(input)
69			time.sleep(0.5)
70			if not await_condition(output_exists):
71			assert False, 'Output file not created...'
72
73			# Removing the watch_dir should not kill the Watcher
74			# simply stop dispatching callbacks
75			shutil.rmtree(watch_dir)
76			time.sleep(0.5)
77			assert c.count == 1
78
79			# Watcher should recover once the input file is there again
80			os.makedirs(watch_dir)
81			shutil.copy2(example('dummy.scss'), watch_dir)
82			time.sleep(0.5)
83			assert c.count == 2
84
85			# Stop watcher
86			w.stop()
87			w.join()
88
89			for _ in range(5):
90			touch(input)
91
92			# Count should not change
93			assert c.count == 2
94
95
96			def test_qtwatcher(tmpdir):
97			"""Test QtWatcher implementation"""
98
99			# Skip when QtWatcher is None - When Qt is not installed
100			if not QtWatcher:
101			return
102
103			# Constructing a QApplication will cause the QtWatcher constructed
104			# below to use a Signal to dispatch callbacks.
105			from qtsass.watchers.qt import QApplication
106
107			qt_app = QApplication.instance()
108			if not qt_app:
109			qt_app = QApplication([])
110
111			watch_dir = tmpdir.join('src').strpath
112			os.makedirs(watch_dir)
113			shutil.copy2(example('dummy.scss'), watch_dir)
114			input = tmpdir.join('src/dummy.scss').strpath
115			output = tmpdir.join('build/dummy.css').strpath
116			output_exists = lambda: exists(output)
			0 ignored issues – show introduced 2019-09-11 23:41 UTC by Report Bug Copy Issue Report The variable `output` does not seem to be defined for all execution paths. Loading history...
117
118			c = CallCounter()
119			w = QtWatcher(
120			watch_dir=watch_dir.strpath,
121			compiler=compile_filename,
122			args=(input, output),
123			)
124			# We connect a counter directly to the Watcher's Qt Signal in order to
125			# verify that the Watcher is actually using a Qt Signal.
126			w.qtdispatcher.signal.connect(c)
127			w.start()
128
129			touch(input)
130			time.sleep(0.5)
131			if not await_condition(output_exists, qt_app=qt_app):
132			assert False, 'Output file not created...'
133			assert c.count == 1
134
135			# Stop watcher
136			w.stop()
137			w.join()
138

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Pull Request — master (#44)

tests.test_watchers.test_watchers() B

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