/usr/lib/python3/dist-packages/traitlets/config/tests/test_application.py is in python3-traitlets 4.3.2-1.
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"""
Tests for traitlets.config.application.Application
"""
# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import json
import logging
import os
from io import StringIO
from unittest import TestCase
try:
from unittest import mock
except ImportError:
import mock
pjoin = os.path.join
from pytest import mark
from traitlets.config.configurable import Configurable
from traitlets.config.loader import Config
from traitlets.tests.utils import check_help_output, check_help_all_output
from traitlets.config.application import (
Application
)
from ipython_genutils.tempdir import TemporaryDirectory
from traitlets.traitlets import (
Bool, Unicode, Integer, List, Dict
)
class Foo(Configurable):
i = Integer(0, help="The integer i.").tag(config=True)
j = Integer(1, help="The integer j.").tag(config=True)
name = Unicode(u'Brian', help="First name.").tag(config=True)
class Bar(Configurable):
b = Integer(0, help="The integer b.").tag(config=True)
enabled = Bool(True, help="Enable bar.").tag(config=True)
class MyApp(Application):
name = Unicode(u'myapp')
running = Bool(False, help="Is the app running?").tag(config=True)
classes = List([Bar, Foo])
config_file = Unicode(u'', help="Load this config file").tag(config=True)
warn_tpyo = Unicode(u"yes the name is wrong on purpose", config=True,
help="Should print a warning if `MyApp.warn-typo=...` command is passed")
aliases = Dict({
'i' : 'Foo.i',
'j' : 'Foo.j',
'name' : 'Foo.name',
'enabled' : 'Bar.enabled',
'log-level' : 'Application.log_level',
})
flags = Dict(dict(enable=({'Bar': {'enabled' : True}}, "Set Bar.enabled to True"),
disable=({'Bar': {'enabled' : False}}, "Set Bar.enabled to False"),
crit=({'Application' : {'log_level' : logging.CRITICAL}},
"set level=CRITICAL"),
))
def init_foo(self):
self.foo = Foo(parent=self)
def init_bar(self):
self.bar = Bar(parent=self)
class TestApplication(TestCase):
def test_log(self):
stream = StringIO()
app = MyApp(log_level=logging.INFO)
handler = logging.StreamHandler(stream)
# trigger reconstruction of the log formatter
app.log.handlers = [handler]
app.log_format = "%(message)s"
app.log_datefmt = "%Y-%m-%d %H:%M"
app.log.info("hello")
assert "hello" in stream.getvalue()
def test_basic(self):
app = MyApp()
self.assertEqual(app.name, u'myapp')
self.assertEqual(app.running, False)
self.assertEqual(app.classes, [MyApp,Bar,Foo])
self.assertEqual(app.config_file, u'')
def test_config(self):
app = MyApp()
app.parse_command_line(["--i=10","--Foo.j=10","--enabled=False","--log-level=50"])
config = app.config
self.assertEqual(config.Foo.i, 10)
self.assertEqual(config.Foo.j, 10)
self.assertEqual(config.Bar.enabled, False)
self.assertEqual(config.MyApp.log_level,50)
def test_config_propagation(self):
app = MyApp()
app.parse_command_line(["--i=10","--Foo.j=10","--enabled=False","--log-level=50"])
app.init_foo()
app.init_bar()
self.assertEqual(app.foo.i, 10)
self.assertEqual(app.foo.j, 10)
self.assertEqual(app.bar.enabled, False)
def test_cli_priority(self):
"""Test that loading config files does not override CLI options"""
name = 'config.py'
class TestApp(Application):
value = Unicode().tag(config=True)
config_file_loaded = Bool().tag(config=True)
aliases = {'v': 'TestApp.value'}
app = TestApp()
with TemporaryDirectory() as td:
config_file = pjoin(td, name)
with open(config_file, 'w') as f:
f.writelines([
"c.TestApp.value = 'config file'\n",
"c.TestApp.config_file_loaded = True\n"
])
app.parse_command_line(['--v=cli'])
assert 'value' in app.config.TestApp
assert app.config.TestApp.value == 'cli'
assert app.value == 'cli'
app.load_config_file(name, path=[td])
assert app.config_file_loaded
assert app.config.TestApp.value == 'cli'
assert app.value == 'cli'
def test_ipython_cli_priority(self):
# this test is almost entirely redundant with above,
# but we can keep it around in case of subtle issues creeping into
# the exact sequence IPython follows.
name = 'config.py'
class TestApp(Application):
value = Unicode().tag(config=True)
config_file_loaded = Bool().tag(config=True)
aliases = {'v': 'TestApp.value'}
app = TestApp()
with TemporaryDirectory() as td:
config_file = pjoin(td, name)
with open(config_file, 'w') as f:
f.writelines([
"c.TestApp.value = 'config file'\n",
"c.TestApp.config_file_loaded = True\n"
])
# follow IPython's config-loading sequence to ensure CLI priority is preserved
app.parse_command_line(['--v=cli'])
# this is where IPython makes a mistake:
# it assumes app.config will not be modified,
# and storing a reference is storing a copy
cli_config = app.config
assert 'value' in app.config.TestApp
assert app.config.TestApp.value == 'cli'
assert app.value == 'cli'
app.load_config_file(name, path=[td])
assert app.config_file_loaded
# enforce cl-opts override config file opts:
# this is where IPython makes a mistake: it assumes
# that cl_config is a different object, but it isn't.
app.update_config(cli_config)
assert app.config.TestApp.value == 'cli'
assert app.value == 'cli'
def test_flags(self):
app = MyApp()
app.parse_command_line(["--disable"])
app.init_bar()
self.assertEqual(app.bar.enabled, False)
app.parse_command_line(["--enable"])
app.init_bar()
self.assertEqual(app.bar.enabled, True)
def test_aliases(self):
app = MyApp()
app.parse_command_line(["--i=5", "--j=10"])
app.init_foo()
self.assertEqual(app.foo.i, 5)
app.init_foo()
self.assertEqual(app.foo.j, 10)
def test_flag_clobber(self):
"""test that setting flags doesn't clobber existing settings"""
app = MyApp()
app.parse_command_line(["--Bar.b=5", "--disable"])
app.init_bar()
self.assertEqual(app.bar.enabled, False)
self.assertEqual(app.bar.b, 5)
app.parse_command_line(["--enable", "--Bar.b=10"])
app.init_bar()
self.assertEqual(app.bar.enabled, True)
self.assertEqual(app.bar.b, 10)
def test_warn_autocorrect(self):
stream = StringIO()
app = MyApp(log_level=logging.INFO)
app.log.handlers = [logging.StreamHandler(stream)]
cfg = Config()
cfg.MyApp.warn_typo = "WOOOO"
app.config = cfg
self.assertIn("warn_typo", stream.getvalue())
self.assertIn("warn_tpyo", stream.getvalue())
def test_flatten_flags(self):
cfg = Config()
cfg.MyApp.log_level = logging.WARN
app = MyApp()
app.update_config(cfg)
self.assertEqual(app.log_level, logging.WARN)
self.assertEqual(app.config.MyApp.log_level, logging.WARN)
app.initialize(["--crit"])
self.assertEqual(app.log_level, logging.CRITICAL)
# this would be app.config.Application.log_level if it failed:
self.assertEqual(app.config.MyApp.log_level, logging.CRITICAL)
def test_flatten_aliases(self):
cfg = Config()
cfg.MyApp.log_level = logging.WARN
app = MyApp()
app.update_config(cfg)
self.assertEqual(app.log_level, logging.WARN)
self.assertEqual(app.config.MyApp.log_level, logging.WARN)
app.initialize(["--log-level", "CRITICAL"])
self.assertEqual(app.log_level, logging.CRITICAL)
# this would be app.config.Application.log_level if it failed:
self.assertEqual(app.config.MyApp.log_level, "CRITICAL")
def test_extra_args(self):
app = MyApp()
app.parse_command_line(["--Bar.b=5", 'extra', "--disable", 'args'])
app.init_bar()
self.assertEqual(app.bar.enabled, False)
self.assertEqual(app.bar.b, 5)
self.assertEqual(app.extra_args, ['extra', 'args'])
app = MyApp()
app.parse_command_line(["--Bar.b=5", '--', 'extra', "--disable", 'args'])
app.init_bar()
self.assertEqual(app.bar.enabled, True)
self.assertEqual(app.bar.b, 5)
self.assertEqual(app.extra_args, ['extra', '--disable', 'args'])
def test_unicode_argv(self):
app = MyApp()
app.parse_command_line(['ünîcødé'])
def test_document_config_option(self):
app = MyApp()
app.document_config_options()
def test_generate_config_file(self):
app = MyApp()
assert 'The integer b.' in app.generate_config_file()
def test_generate_config_file_classes_to_include(self):
class NoTraits(Foo, Bar):
pass
app = MyApp()
app.classes.append(NoTraits)
conf_txt = app.generate_config_file()
self.assertIn('The integer b.', conf_txt)
self.assertIn('# Bar(Configurable)', conf_txt)
self.assertIn('# Foo(Configurable)', conf_txt)
self.assertNotIn('# Configurable', conf_txt)
self.assertIn('# NoTraits(Foo,Bar)', conf_txt)
def test_multi_file(self):
app = MyApp()
app.log = logging.getLogger()
name = 'config.py'
with TemporaryDirectory('_1') as td1:
with open(pjoin(td1, name), 'w') as f1:
f1.write("get_config().MyApp.Bar.b = 1")
with TemporaryDirectory('_2') as td2:
with open(pjoin(td2, name), 'w') as f2:
f2.write("get_config().MyApp.Bar.b = 2")
app.load_config_file(name, path=[td2, td1])
app.init_bar()
self.assertEqual(app.bar.b, 2)
app.load_config_file(name, path=[td1, td2])
app.init_bar()
self.assertEqual(app.bar.b, 1)
@mark.skipif(not hasattr(TestCase, 'assertLogs'), reason='requires TestCase.assertLogs')
def test_log_collisions(self):
app = MyApp()
app.log = logging.getLogger()
app.log.setLevel(logging.INFO)
name = 'config'
with TemporaryDirectory('_1') as td:
with open(pjoin(td, name + '.py'), 'w') as f:
f.write("get_config().Bar.b = 1")
with open(pjoin(td, name + '.json'), 'w') as f:
json.dump({
'Bar': {
'b': 2
}
}, f)
with self.assertLogs(app.log, logging.WARNING) as captured:
app.load_config_file(name, path=[td])
app.init_bar()
assert app.bar.b == 2
output = '\n'.join(captured.output)
assert 'Collision' in output
assert '1 ignored, using 2' in output
assert pjoin(td, name + '.py') in output
assert pjoin(td, name + '.json') in output
@mark.skipif(not hasattr(TestCase, 'assertLogs'), reason='requires TestCase.assertLogs')
def test_log_bad_config(self):
app = MyApp()
app.log = logging.getLogger()
name = 'config.py'
with TemporaryDirectory() as td:
with open(pjoin(td, name), 'w') as f:
f.write("syntax error()")
with self.assertLogs(app.log, logging.ERROR) as captured:
app.load_config_file(name, path=[td])
output = '\n'.join(captured.output)
self.assertIn('SyntaxError', output)
def test_raise_on_bad_config(self):
app = MyApp()
app.raise_config_file_errors = True
app.log = logging.getLogger()
name = 'config.py'
with TemporaryDirectory() as td:
with open(pjoin(td, name), 'w') as f:
f.write("syntax error()")
with self.assertRaises(SyntaxError):
app.load_config_file(name, path=[td])
class DeprecatedApp(Application):
override_called = False
parent_called = False
def _config_changed(self, name, old, new):
self.override_called = True
def _capture(*args):
self.parent_called = True
with mock.patch.object(self.log, 'debug', _capture):
super(DeprecatedApp, self)._config_changed(name, old, new)
def test_deprecated_notifier():
app = DeprecatedApp()
assert not app.override_called
assert not app.parent_called
app.config = Config({'A': {'b': 'c'}})
assert app.override_called
assert app.parent_called
def test_help_output():
check_help_output(__name__)
check_help_all_output(__name__)
if __name__ == '__main__':
# for test_help_output:
MyApp.launch_instance()
|