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"""Tests for flake8.plugins.manager.Plugin."""
import optparse
import mock
import pytest
from flake8 import exceptions
from flake8.plugins import manager
def test_load_plugin_fallsback_on_old_setuptools():
"""Verify we fallback gracefully to on old versions of setuptools."""
entry_point = mock.Mock(spec=['load'])
plugin = manager.Plugin('T000', entry_point)
plugin.load_plugin()
entry_point.load.assert_called_once_with(require=False)
def test_load_plugin_avoids_deprecated_entry_point_methods():
"""Verify we use the preferred methods on new versions of setuptools."""
entry_point = mock.Mock(spec=['require', 'resolve', 'load'])
plugin = manager.Plugin('T000', entry_point)
plugin.load_plugin(verify_requirements=True)
assert entry_point.load.called is False
entry_point.require.assert_called_once_with()
entry_point.resolve.assert_called_once_with()
def test_load_plugin_is_idempotent():
"""Verify we use the preferred methods on new versions of setuptools."""
entry_point = mock.Mock(spec=['require', 'resolve', 'load'])
plugin = manager.Plugin('T000', entry_point)
plugin.load_plugin(verify_requirements=True)
plugin.load_plugin(verify_requirements=True)
plugin.load_plugin()
assert entry_point.load.called is False
entry_point.require.assert_called_once_with()
entry_point.resolve.assert_called_once_with()
def test_load_plugin_only_calls_require_when_verifying_requirements():
"""Verify we do not call require when verify_requirements is False."""
entry_point = mock.Mock(spec=['require', 'resolve', 'load'])
plugin = manager.Plugin('T000', entry_point)
plugin.load_plugin()
assert entry_point.load.called is False
assert entry_point.require.called is False
entry_point.resolve.assert_called_once_with()
def test_load_plugin_catches_and_reraises_exceptions():
"""Verify we raise our own FailedToLoadPlugin."""
entry_point = mock.Mock(spec=['require', 'resolve'])
entry_point.resolve.side_effect = ValueError('Test failure')
plugin = manager.Plugin('T000', entry_point)
with pytest.raises(exceptions.FailedToLoadPlugin):
plugin.load_plugin()
def test_plugin_property_loads_plugin_on_first_use():
"""Verify that we load our plugin when we first try to use it."""
entry_point = mock.Mock(spec=['require', 'resolve', 'load'])
plugin = manager.Plugin('T000', entry_point)
assert plugin.plugin is not None
entry_point.resolve.assert_called_once_with()
def test_execute_calls_plugin_with_passed_arguments():
"""Verify that we pass arguments directly to the plugin."""
entry_point = mock.Mock(spec=['require', 'resolve', 'load'])
plugin_obj = mock.Mock()
plugin = manager.Plugin('T000', entry_point)
plugin._plugin = plugin_obj
plugin.execute('arg1', 'arg2', kwarg1='value1', kwarg2='value2')
plugin_obj.assert_called_once_with(
'arg1', 'arg2', kwarg1='value1', kwarg2='value2'
)
# Extra assertions
assert entry_point.load.called is False
assert entry_point.require.called is False
assert entry_point.resolve.called is False
def test_version_proxies_to_the_plugin():
"""Verify that we pass arguments directly to the plugin."""
entry_point = mock.Mock(spec=['require', 'resolve', 'load'])
plugin_obj = mock.Mock(spec_set=['version'])
plugin_obj.version = 'a.b.c'
plugin = manager.Plugin('T000', entry_point)
plugin._plugin = plugin_obj
assert plugin.version == 'a.b.c'
def test_register_options():
"""Verify we call add_options on the plugin only if it exists."""
# Set up our mocks and Plugin object
entry_point = mock.Mock(spec=['require', 'resolve', 'load'])
plugin_obj = mock.Mock(spec_set=['name', 'version', 'add_options',
'parse_options'])
option_manager = mock.Mock(spec=['register_plugin'])
plugin = manager.Plugin('T000', entry_point)
plugin._plugin = plugin_obj
# Call the method we're testing.
plugin.register_options(option_manager)
# Assert that we call add_options
plugin_obj.add_options.assert_called_once_with(option_manager)
def test_register_options_checks_plugin_for_method():
"""Verify we call add_options on the plugin only if it exists."""
# Set up our mocks and Plugin object
entry_point = mock.Mock(spec=['require', 'resolve', 'load'])
plugin_obj = mock.Mock(spec_set=['name', 'version', 'parse_options'])
option_manager = mock.Mock(spec=['register_plugin'])
plugin = manager.Plugin('T000', entry_point)
plugin._plugin = plugin_obj
# Call the method we're testing.
plugin.register_options(option_manager)
# Assert that we register the plugin
assert option_manager.register_plugin.called is False
def test_provide_options():
"""Verify we call add_options on the plugin only if it exists."""
# Set up our mocks and Plugin object
entry_point = mock.Mock(spec=['require', 'resolve', 'load'])
plugin_obj = mock.Mock(spec_set=['name', 'version', 'add_options',
'parse_options'])
option_values = optparse.Values({'enable_extensions': []})
option_manager = mock.Mock()
plugin = manager.Plugin('T000', entry_point)
plugin._plugin = plugin_obj
# Call the method we're testing.
plugin.provide_options(option_manager, option_values, None)
# Assert that we call add_options
plugin_obj.parse_options.assert_called_once_with(
option_manager, option_values, None
)
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