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openlp/tests/functional/openlp_core/common/test_common.py

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# -*- coding: utf-8 -*-
##########################################################################
# OpenLP - Open Source Lyrics Projection #
# ---------------------------------------------------------------------- #
# Copyright (c) 2008-2020 OpenLP Developers #
# ---------------------------------------------------------------------- #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
##########################################################################
"""
Functional tests to test the AppLocation class and related methods.
"""
from pathlib import Path
from unittest import TestCase, skipUnless
from unittest.mock import MagicMock, call, patch
from openlp.core.common import Singleton, clean_button_text, de_hump, extension_loader, is_linux, is_macosx, is_win, \
is_64bit_instance, normalize_str, path_to_module, trace_error_handler
class TestCommonFunctions(TestCase):
"""
A test suite to test out various functions in the openlp.core.common module.
"""
def test_extension_loader_no_files_found(self):
"""
Test the `extension_loader` function when no files are found
"""
# GIVEN: A mocked `Path.glob` method which does not match any files
with patch('openlp.core.common.applocation.AppLocation.get_directory',
return_value=Path('/', 'app', 'dir', 'openlp')), \
patch.object(Path, 'glob', return_value=[]), \
patch('openlp.core.common.importlib.import_module') as mocked_import_module:
# WHEN: Calling `extension_loader`
extension_loader('glob', ['file2.py', 'file3.py'])
# THEN: `extension_loader` should not try to import any files
assert mocked_import_module.called is False
def test_extension_loader_files_found(self):
"""
Test the `extension_loader` function when it successfully finds and loads some files
"""
# GIVEN: A mocked `Path.glob` method which returns a list of files
with patch('openlp.core.common.applocation.AppLocation.get_directory',
return_value=Path('/', 'app', 'dir', 'openlp')), \
patch.object(Path, 'glob', return_value=[
Path('/', 'app', 'dir', 'openlp', 'import_dir', 'file1.py'),
Path('/', 'app', 'dir', 'openlp', 'import_dir', 'file2.py'),
Path('/', 'app', 'dir', 'openlp', 'import_dir', 'file3.py'),
Path('/', 'app', 'dir', 'openlp', 'import_dir', 'file4.py')]), \
patch('openlp.core.common.importlib.import_module') as mocked_import_module:
# WHEN: Calling `extension_loader` with a list of files to exclude
extension_loader('glob', ['file2.py', 'file3.py'])
# THEN: `extension_loader` should only try to import the files that are matched by the blob, excluding the
# files listed in the `excluded_files` argument
mocked_import_module.assert_has_calls([call('openlp.import_dir.file1'),
call('openlp.import_dir.file4')])
def test_extension_loader_import_error(self):
"""
Test the `extension_loader` function when `SourceFileLoader` raises a `ImportError`
"""
# GIVEN: A mocked `import_module` which raises an `ImportError`
with patch('openlp.core.common.applocation.AppLocation.get_directory',
return_value=Path('/', 'app', 'dir', 'openlp')), \
patch.object(Path, 'glob', return_value=[
Path('/', 'app', 'dir', 'openlp', 'import_dir', 'file1.py')]), \
patch('openlp.core.common.importlib.import_module', side_effect=ImportError()), \
patch('openlp.core.common.log') as mocked_logger:
# WHEN: Calling `extension_loader`
extension_loader('glob')
# THEN: The `ImportError` should be caught and logged
assert mocked_logger.exception.called
def test_extension_loader_os_error(self):
"""
Test the `extension_loader` function when `import_module` raises a `ImportError`
"""
# GIVEN: A mocked `SourceFileLoader` which raises an `OSError`
with patch('openlp.core.common.applocation.AppLocation.get_directory',
return_value=Path('/', 'app', 'dir', 'openlp')), \
patch.object(Path, 'glob', return_value=[
Path('/', 'app', 'dir', 'openlp', 'import_dir', 'file1.py')]), \
patch('openlp.core.common.importlib.import_module', side_effect=OSError()), \
patch('openlp.core.common.log') as mocked_logger:
# WHEN: Calling `extension_loader`
extension_loader('glob')
# THEN: The `OSError` should be caught and logged
assert mocked_logger.exception.called
def test_de_hump_conversion(self):
"""
Test the de_hump function with a class name
"""
# GIVEN: a Class name in Camel Case
string = "MyClass"
# WHEN: we call de_hump
new_string = de_hump(string)
# THEN: the new string should be converted to python format
assert new_string == "my_class", 'The class name should have been converted'
def test_de_hump_static(self):
"""
Test the de_hump function with a python string
"""
# GIVEN: a Class name in Camel Case
string = "my_class"
# WHEN: we call de_hump
new_string = de_hump(string)
# THEN: the new string should be converted to python format
assert new_string == "my_class", 'The class name should have been preserved'
def test_path_to_module(self):
"""
Test `path_to_module` when supplied with a `Path` object
"""
# GIVEN: A `Path` object
path = Path('core', 'ui', 'media', 'vlcplayer.py')
# WHEN: Calling path_to_module with the `Path` object
result = path_to_module(path)
# THEN: path_to_module should return the module name
assert result == 'openlp.core.ui.media.vlcplayer'
def test_trace_error_handler(self):
"""
Test the trace_error_handler() method
"""
# GIVEN: Mocked out objects
with patch('openlp.core.common.traceback') as mocked_traceback:
mocked_traceback.extract_stack.return_value = [('openlp.fake', 56, None, 'trace_error_handler_test')]
mocked_logger = MagicMock()
# WHEN: trace_error_handler() is called
trace_error_handler(mocked_logger)
# THEN: The mocked_logger.error() method should have been called with the correct parameters
mocked_logger.error.assert_called_with(
'OpenLP Error trace\n File openlp.fake at line 56 \n\t called trace_error_handler_test')
def test_singleton_metaclass_multiple_init(self):
"""
Test that a class using the Singleton Metaclass is only initialised once despite being called several times and
that the same instance is returned each time..
"""
# GIVEN: The Singleton Metaclass and a test class using it
class SingletonClass(metaclass=Singleton):
def __init__(self):
pass
with patch.object(SingletonClass, '__init__', return_value=None) as patched_init:
# WHEN: Initialising the class multiple times
inst_1 = SingletonClass()
inst_2 = SingletonClass()
# THEN: The __init__ method of the SingletonClass should have only been called once, and both returned values
# should be the same instance.
assert inst_1 is inst_2
assert patched_init.call_count == 1
def test_singleton_metaclass_multiple_classes(self):
"""
Test that multiple classes using the Singleton Metaclass return the different an appropriate instances.
"""
# GIVEN: Two different classes using the Singleton Metaclass
class SingletonClass1(metaclass=Singleton):
def __init__(self):
pass
class SingletonClass2(metaclass=Singleton):
def __init__(self):
pass
# WHEN: Initialising both classes
s_c1 = SingletonClass1()
s_c2 = SingletonClass2()
# THEN: The instances should be an instance of the appropriate class
assert isinstance(s_c1, SingletonClass1)
assert isinstance(s_c2, SingletonClass2)
def test_is_win(self):
"""
Test the is_win() function
"""
# GIVEN: Mocked out objects
with patch('openlp.core.common.os') as mocked_os, patch('openlp.core.common.sys') as mocked_sys:
# WHEN: The mocked os.name and sys.platform are set to 'nt' and 'win32' repectivly
mocked_os.name = 'nt'
mocked_sys.platform = 'win32'
# THEN: The three platform functions should perform properly
assert is_win() is True, 'is_win() should return True'
assert is_macosx() is False, 'is_macosx() should return False'
assert is_linux() is False, 'is_linux() should return False'
def test_is_macosx(self):
"""
Test the is_macosx() function
"""
# GIVEN: Mocked out objects
with patch('openlp.core.common.os') as mocked_os, patch('openlp.core.common.sys') as mocked_sys:
# WHEN: The mocked os.name and sys.platform are set to 'posix' and 'darwin' repectivly
mocked_os.name = 'posix'
mocked_sys.platform = 'darwin'
# THEN: The three platform functions should perform properly
assert is_macosx() is True, 'is_macosx() should return True'
assert is_win() is False, 'is_win() should return False'
assert is_linux() is False, 'is_linux() should return False'
def test_is_linux(self):
"""
Test the is_linux() function
"""
# GIVEN: Mocked out objects
with patch('openlp.core.common.os') as mocked_os, patch('openlp.core.common.sys') as mocked_sys:
# WHEN: The mocked os.name and sys.platform are set to 'posix' and 'linux3' repectively
mocked_os.name = 'posix'
mocked_sys.platform = 'linux3'
# THEN: The three platform functions should perform properly
assert is_linux() is True, 'is_linux() should return True'
assert is_win() is False, 'is_win() should return False'
assert is_macosx() is False, 'is_macosx() should return False'
@skipUnless(is_linux(), 'This can only run on Linux')
def test_is_linux_distro(self):
"""
Test the is_linux() function for a particular Linux distribution
"""
# GIVEN: Mocked out objects
with patch('openlp.core.common.os') as mocked_os, \
patch('openlp.core.common.sys') as mocked_sys, \
patch('openlp.core.common.distro_id') as mocked_distro_id:
# WHEN: The mocked os.name and sys.platform are set to 'posix' and 'linux3' repectively
# and the distro is Fedora
mocked_os.name = 'posix'
mocked_sys.platform = 'linux3'
mocked_distro_id.return_value = 'fedora'
# THEN: The three platform functions should perform properly
assert is_linux(distro='fedora') is True, 'is_linux(distro="fedora") should return True'
assert is_win() is False, 'is_win() should return False'
assert is_macosx() is False, 'is_macosx() should return False'
def test_is_64bit_instance(self):
"""
Test the is_64bit_instance() function
"""
# GIVEN: Mocked out objects
with patch('openlp.core.common.sys') as mocked_sys:
# WHEN: The mocked sys.maxsize is set to 32-bit
mocked_sys.maxsize = 2**32
# THEN: The result should be False
assert is_64bit_instance() is False, 'is_64bit_instance() should return False'
def test_normalize_str_leaves_newlines(self):
# GIVEN: a string containing newlines
string = 'something\nelse'
# WHEN: normalize is called
normalized_string = normalize_str(string)
# THEN: string is unchanged
assert normalized_string == string
def test_normalize_str_removes_null_byte(self):
# GIVEN: a string containing a null byte
string = 'somet\x00hing'
# WHEN: normalize is called
normalized_string = normalize_str(string)
# THEN: nullbyte is removed
assert normalized_string == 'something'
def test_normalize_str_replaces_crlf_with_lf(self):
# GIVEN: a string containing crlf
string = 'something\r\nelse'
# WHEN: normalize is called
normalized_string = normalize_str(string)
# THEN: crlf is replaced with lf
assert normalized_string == 'something\nelse'
def test_clean_button_text(self):
"""
Test the clean_button_text() function.
"""
# GIVEN: Button text
input_text = '&Next >'
expected_text = 'Next'
# WHEN: The button caption is sent through the clean_button_text function
actual_text = clean_button_text(input_text)
# THEN: The text should have been cleaned
assert expected_text == actual_text, 'The text should be clean'
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