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tutor/tests/test_plugins_v0.py

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feat: migrate to plugins.v1 with filters & actions This is a very large refactoring which aims at making Tutor both more extendable and more generic. Historically, the Tutor plugin system was designed as an ad-hoc solution to allow developers to modify their own Open edX platforms without having to fork Tutor. The plugin API was simple, but limited, because of its ad-hoc nature. As a consequence, there were many things that plugin developers could not do, such as extending different parts of the CLI or adding custom template filters. Here, we refactor the whole codebase to make use of a generic plugin system. This system was inspired by the Wordpress plugin API and the Open edX "hooks and filters" API. The various components are added to a small core thanks to a set of actions and filters. Actions are callback functions that can be triggered at different points of the application lifecycle. Filters are functions that modify some data. Both actions and filters are collectively named as "hooks". Hooks can optionally be created within a certain context, which makes it easier to keep track of which application created which callback. This new hooks system allows us to provide a Python API that developers can use to extend their applications. The API reference is added to the documentation, along with a new plugin development tutorial. The plugin v0 API remains supported for backward compatibility of existing plugins. Done: - Do not load commands from plugins which are not enabled. - Load enabled plugins once on start. - Implement contexts for actions and filters, which allow us to keep track of the source of every hook. - Migrate patches - Migrate commands - Migrate plugin detection - Migrate templates_root - Migrate config - Migrate template environment globals and filters - Migrate hooks to tasks - Generate hook documentation - Generate patch reference documentation - Add the concept of action priority Close #499.
2022-02-07 17:11:43 +00:00
import typing as t
from unittest.mock import patch
from tests.helpers import PluginsTestCase, temporary_root
from tutor import config as tutor_config
from tutor import exceptions, fmt, hooks, plugins
from tutor.plugins import v0 as plugins_v0
from tutor.types import Config, get_typed
class PluginsTests(PluginsTestCase):
def test_iter_installed(self) -> None:
self.assertEqual([], list(plugins.iter_installed()))
def test_is_installed(self) -> None:
self.assertFalse(plugins.is_installed("dummy"))
def test_official_plugins(self) -> None:
# Create 2 official plugins
plugins_v0.OfficialPlugin("plugin1")
plugins_v0.OfficialPlugin("plugin2")
self.assertEqual(
["plugin1", "plugin2"],
list(plugins.iter_installed()),
)
def test_load(self) -> None:
config: Config = {tutor_config.PLUGINS_CONFIG_KEY: []}
plugins_v0.DictPlugin({"name": "plugin1"})
plugins_v0.DictPlugin({"name": "plugin2"})
plugins.load("plugin2")
plugins.load("plugin1")
tutor_config.save_enabled_plugins(config)
self.assertEqual(
["plugin1", "plugin2"], config[tutor_config.PLUGINS_CONFIG_KEY]
)
def test_enable_twice(self) -> None:
plugins_v0.DictPlugin({"name": "plugin1"})
plugins.load("plugin1")
plugins.load("plugin1")
config: Config = {tutor_config.PLUGINS_CONFIG_KEY: []}
tutor_config.save_enabled_plugins(config)
self.assertEqual(["plugin1"], config[tutor_config.PLUGINS_CONFIG_KEY])
def test_load_not_installed_plugin(self) -> None:
self.assertRaises(exceptions.TutorError, plugins.load, "plugin1")
def test_disable(self) -> None:
plugins_v0.DictPlugin(
{
"name": "plugin1",
"version": "1.0.0",
"config": {"set": {"KEY": "value"}},
}
)
plugins_v0.DictPlugin(
{
"name": "plugin2",
"version": "1.0.0",
}
)
config: Config = {"PLUGINS": ["plugin1", "plugin2"]}
tutor_config.enable_plugins(config)
with patch.object(fmt, "STDOUT"):
hooks.Actions.PLUGIN_UNLOADED.do("plugin1", "", config)
self.assertEqual(["plugin2"], config["PLUGINS"])
def test_disable_removes_set_config(self) -> None:
plugins_v0.DictPlugin(
{
"name": "plugin1",
"version": "1.0.0",
"config": {"set": {"KEY": "value"}},
}
)
config: Config = {"PLUGINS": ["plugin1"], "KEY": "value"}
tutor_config.enable_plugins(config)
with patch.object(fmt, "STDOUT"):
hooks.Actions.PLUGIN_UNLOADED.do("plugin1", "", config)
self.assertEqual([], config["PLUGINS"])
self.assertNotIn("KEY", config)
def test_patches(self) -> None:
plugins_v0.DictPlugin(
{"name": "plugin1", "patches": {"patch1": "Hello {{ ID }}"}}
)
plugins.load("plugin1")
patches = list(plugins.iter_patches("patch1"))
self.assertEqual(["Hello {{ ID }}"], patches)
def test_plugin_without_patches(self) -> None:
plugins_v0.DictPlugin({"name": "plugin1"})
plugins.load("plugin1")
patches = list(plugins.iter_patches("patch1"))
self.assertEqual([], patches)
def test_configure(self) -> None:
plugins_v0.DictPlugin(
{
"name": "plugin1",
"config": {
"add": {"PARAM1": "value1", "PARAM2": "value2"},
"set": {"PARAM3": "value3"},
"defaults": {"PARAM4": "value4"},
},
}
)
plugins.load("plugin1")
base = tutor_config.get_base()
defaults = tutor_config.get_defaults()
self.assertEqual(base["PARAM3"], "value3")
self.assertEqual(base["PLUGIN1_PARAM1"], "value1")
self.assertEqual(base["PLUGIN1_PARAM2"], "value2")
self.assertEqual(defaults["PLUGIN1_PARAM4"], "value4")
def test_configure_set_does_not_override(self) -> None:
config: Config = {"ID1": "oldid"}
plugins_v0.DictPlugin(
{"name": "plugin1", "config": {"set": {"ID1": "newid", "ID2": "id2"}}}
)
plugins.load("plugin1")
tutor_config.update_with_base(config)
self.assertEqual("oldid", config["ID1"])
self.assertEqual("id2", config["ID2"])
def test_configure_set_random_string(self) -> None:
plugins_v0.DictPlugin(
{
"name": "plugin1",
"config": {"set": {"PARAM1": "{{ 128|random_string }}"}},
}
)
plugins.load("plugin1")
config = tutor_config.get_base()
tutor_config.render_full(config)
self.assertEqual(128, len(get_typed(config, "PARAM1", str)))
def test_configure_default_value_with_previous_definition(self) -> None:
config: Config = {"PARAM1": "value"}
plugins_v0.DictPlugin(
{"name": "plugin1", "config": {"defaults": {"PARAM2": "{{ PARAM1 }}"}}}
)
plugins.load("plugin1")
tutor_config.update_with_defaults(config)
self.assertEqual("{{ PARAM1 }}", config["PLUGIN1_PARAM2"])
def test_config_load_from_plugins(self) -> None:
config: Config = {}
plugins_v0.DictPlugin(
{"name": "plugin1", "config": {"add": {"PARAM1": "{{ 10|random_string }}"}}}
)
plugins.load("plugin1")
tutor_config.update_with_base(config)
tutor_config.update_with_defaults(config)
tutor_config.render_full(config)
value1 = get_typed(config, "PLUGIN1_PARAM1", str)
self.assertEqual(10, len(value1))
def test_init_tasks(self) -> None:
plugins_v0.DictPlugin({"name": "plugin1", "hooks": {"init": ["myclient"]}})
plugins.load("plugin1")
self.assertIn(
("myclient", ("plugin1", "hooks", "myclient", "init")),
list(hooks.Filters.COMMANDS_INIT.iterate()),
)
def test_plugins_are_updated_on_config_change(self) -> None:
config: Config = {}
plugins_v0.DictPlugin({"name": "plugin1"})
tutor_config.enable_plugins(config)
plugins1 = list(plugins.iter_loaded())
config["PLUGINS"] = ["plugin1"]
tutor_config.enable_plugins(config)
plugins2 = list(plugins.iter_loaded())
self.assertEqual([], plugins1)
self.assertEqual(1, len(plugins2))
def test_dict_plugin(self) -> None:
plugin = plugins_v0.DictPlugin(
{"name": "myplugin", "config": {"set": {"KEY": "value"}}, "version": "0.1"}
)
plugins.load("myplugin")
overriden_items: t.List[
t.Tuple[str, t.Any]
] = hooks.Filters.CONFIG_OVERRIDES.apply([])
versions = list(plugins.iter_info())
self.assertEqual("myplugin", plugin.name)
self.assertEqual([("myplugin", "0.1")], versions)
self.assertEqual([("KEY", "value")], overriden_items)
def test_config_disable_plugin(self) -> None:
plugins_v0.DictPlugin(
{"name": "plugin1", "config": {"set": {"KEY1": "value1"}}}
)
plugins_v0.DictPlugin(
{"name": "plugin2", "config": {"set": {"KEY2": "value2"}}}
)
plugins.load("plugin1")
plugins.load("plugin2")
with temporary_root() as root:
config = tutor_config.load_minimal(root)
config_pre = config.copy()
with patch.object(fmt, "STDOUT"):
hooks.Actions.PLUGIN_UNLOADED.do("plugin1", "", config)
config_post = tutor_config.load_minimal(root)
self.assertEqual("value1", config_pre["KEY1"])
self.assertEqual("value2", config_pre["KEY2"])
self.assertNotIn("KEY1", config)
self.assertNotIn("KEY1", config_post)
self.assertEqual("value2", config["KEY2"])