beets/test/_common.py
Johnny Robeson 00bff81756 add a flush() method to test DummyOut
The method just runs `self.clear()`
2016-07-04 02:24:32 -04:00

380 lines
9.5 KiB
Python

# -*- coding: utf-8 -*-
# This file is part of beets.
# Copyright 2016, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Some common functionality for beets' test cases."""
from __future__ import division, absolute_import, print_function
import time
import sys
import os
import tempfile
import shutil
import six
import unittest
from contextlib import contextmanager
# Mangle the search path to include the beets sources.
sys.path.insert(0, '..') # noqa
import beets.library
from beets import importer, logging
from beets.ui import commands
from beets import util
import beets
# Make sure the development versions of the plugins are used
import beetsplug
beetsplug.__path__ = [os.path.abspath(
os.path.join(__file__, '..', '..', 'beetsplug')
)]
# Test resources path.
RSRC = util.bytestring_path(os.path.join(os.path.dirname(__file__), 'rsrc'))
PLUGINPATH = os.path.join(os.path.dirname(__file__), 'rsrc', 'beetsplug')
# Propagate to root loger so nosetest can capture it
log = logging.getLogger('beets')
log.propagate = True
log.setLevel(logging.DEBUG)
# Dummy item creation.
_item_ident = 0
# OS feature test.
HAVE_SYMLINK = hasattr(os, 'symlink')
def item(lib=None):
global _item_ident
_item_ident += 1
i = beets.library.Item(
title=u'the title',
artist=u'the artist',
albumartist=u'the album artist',
album=u'the album',
genre=u'the genre',
composer=u'the composer',
grouping=u'the grouping',
year=1,
month=2,
day=3,
track=4,
tracktotal=5,
disc=6,
disctotal=7,
lyrics=u'the lyrics',
comments=u'the comments',
bpm=8,
comp=True,
path='somepath{0}'.format(_item_ident),
length=60.0,
bitrate=128000,
format='FLAC',
mb_trackid='someID-1',
mb_albumid='someID-2',
mb_artistid='someID-3',
mb_albumartistid='someID-4',
album_id=None,
)
if lib:
lib.add(i)
return i
_album_ident = 0
def album(lib=None):
global _item_ident
_item_ident += 1
i = beets.library.Album(
artpath=None,
albumartist=u'some album artist',
albumartist_sort=u'some sort album artist',
albumartist_credit=u'some album artist credit',
album=u'the album',
genre=u'the genre',
year=2014,
month=2,
day=5,
tracktotal=0,
disctotal=1,
comp=False,
mb_albumid='someID-1',
mb_albumartistid='someID-1'
)
if lib:
lib.add(i)
return i
# Dummy import session.
def import_session(lib=None, loghandler=None, paths=[], query=[], cli=False):
cls = commands.TerminalImportSession if cli else importer.ImportSession
return cls(lib, loghandler, paths, query)
class Assertions(object):
"""A mixin with additional unit test assertions."""
def assertExists(self, path): # noqa
self.assertTrue(os.path.exists(util.syspath(path)),
u'file does not exist: {!r}'.format(path))
def assertNotExists(self, path): # noqa
self.assertFalse(os.path.exists(util.syspath(path)),
u'file exists: {!r}'.format((path)))
def assert_equal_path(self, a, b):
"""Check that two paths are equal."""
# The common case.
if a == b:
return
self.assertEqual(util.normpath(a), util.normpath(b),
u'paths are not equal: {!r} and {!r}'.format(a, b))
# A test harness for all beets tests.
# Provides temporary, isolated configuration.
class TestCase(unittest.TestCase, Assertions):
"""A unittest.TestCase subclass that saves and restores beets'
global configuration. This allows tests to make temporary
modifications that will then be automatically removed when the test
completes. Also provides some additional assertion methods, a
temporary directory, and a DummyIO.
"""
def setUp(self):
# A "clean" source list including only the defaults.
beets.config.sources = []
beets.config.read(user=False, defaults=True)
# Direct paths to a temporary directory. Tests can also use this
# temporary directory.
self.temp_dir = util.bytestring_path(tempfile.mkdtemp())
beets.config['statefile'] = \
util.py3_path(os.path.join(self.temp_dir, b'state.pickle'))
beets.config['library'] = \
util.py3_path(os.path.join(self.temp_dir, b'library.db'))
beets.config['directory'] = \
util.py3_path(os.path.join(self.temp_dir, b'libdir'))
# Set $HOME, which is used by confit's `config_dir()` to create
# directories.
self._old_home = os.environ.get('HOME')
os.environ['HOME'] = util.py3_path(self.temp_dir)
# Initialize, but don't install, a DummyIO.
self.io = DummyIO()
def tearDown(self):
if os.path.isdir(self.temp_dir):
shutil.rmtree(self.temp_dir)
if self._old_home is None:
del os.environ['HOME']
else:
os.environ['HOME'] = self._old_home
self.io.restore()
beets.config.clear()
beets.config._materialized = False
class LibTestCase(TestCase):
"""A test case that includes an in-memory library object (`lib`) and
an item added to the library (`i`).
"""
def setUp(self):
super(LibTestCase, self).setUp()
self.lib = beets.library.Library(':memory:')
self.i = item(self.lib)
def tearDown(self):
self.lib._connection().close()
super(LibTestCase, self).tearDown()
# Mock timing.
class Timecop(object):
"""Mocks the timing system (namely time() and sleep()) for testing.
Inspired by the Ruby timecop library.
"""
def __init__(self):
self.now = time.time()
def time(self):
return self.now
def sleep(self, amount):
self.now += amount
def install(self):
self.orig = {
'time': time.time,
'sleep': time.sleep,
}
time.time = self.time
time.sleep = self.sleep
def restore(self):
time.time = self.orig['time']
time.sleep = self.orig['sleep']
# Mock I/O.
class InputException(Exception):
def __init__(self, output=None):
self.output = output
def __str__(self):
msg = "Attempt to read with no input provided."
if self.output is not None:
msg += " Output: {!r}".format(self.output)
return msg
class DummyOut(object):
encoding = 'utf8'
def __init__(self):
self.buf = []
def write(self, s):
self.buf.append(s)
def get(self):
if six.PY2:
return b''.join(self.buf)
else:
return ''.join(self.buf)
def flush(self):
self.clear()
def clear(self):
self.buf = []
class DummyIn(object):
encoding = 'utf8'
def __init__(self, out=None):
self.buf = []
self.reads = 0
self.out = out
def add(self, s):
if six.PY2:
self.buf.append(s + b'\n')
else:
self.buf.append(s + '\n')
def readline(self):
if not self.buf:
if self.out:
raise InputException(self.out.get())
else:
raise InputException()
self.reads += 1
return self.buf.pop(0)
class DummyIO(object):
"""Mocks input and output streams for testing UI code."""
def __init__(self):
self.stdout = DummyOut()
self.stdin = DummyIn(self.stdout)
def addinput(self, s):
self.stdin.add(s)
def getoutput(self):
res = self.stdout.get()
self.stdout.clear()
return res
def readcount(self):
return self.stdin.reads
def install(self):
sys.stdin = self.stdin
sys.stdout = self.stdout
def restore(self):
sys.stdin = sys.__stdin__
sys.stdout = sys.__stdout__
# Utility.
def touch(path):
open(path, 'a').close()
class Bag(object):
"""An object that exposes a set of fields given as keyword
arguments. Any field not found in the dictionary appears to be None.
Used for mocking Album objects and the like.
"""
def __init__(self, **fields):
self.fields = fields
def __getattr__(self, key):
return self.fields.get(key)
# Platform mocking.
@contextmanager
def platform_windows():
import ntpath
old_path = os.path
try:
os.path = ntpath
yield
finally:
os.path = old_path
@contextmanager
def platform_posix():
import posixpath
old_path = os.path
try:
os.path = posixpath
yield
finally:
os.path = old_path
@contextmanager
def system_mock(name):
import platform
old_system = platform.system
platform.system = lambda: name
try:
yield
finally:
platform.system = old_system
def slow_test(unused=None):
def _id(obj):
return obj
if 'SKIP_SLOW_TESTS' in os.environ:
return unittest.skip(u'test is slow')
return _id