path: root/contrib/python/traitlets/py3/tests/config/test_configurable.py

"""Tests for traitlets.config.configurable"""

# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.

import logging
from unittest import TestCase

from pytest import mark

from .._warnings import expected_warnings
from traitlets.config.application import Application
from traitlets.config.configurable import Configurable, LoggingConfigurable, SingletonConfigurable
from traitlets.config.loader import Config
from traitlets.log import get_logger
from traitlets.traitlets import (
    CaselessStrEnum,
    Dict,
    Enum,
    Float,
    FuzzyEnum,
    Integer,
    List,
    Set,
    Unicode,
    validate,
)
from traitlets.utils.warnings import _deprecations_shown


class MyConfigurable(Configurable):
    a = Integer(1, help="The integer a.").tag(config=True)
    b = Float(1.0, help="The integer b.").tag(config=True)
    c = Unicode("no config")


mc_help = """MyConfigurable(Configurable) options
------------------------------------
--MyConfigurable.a=<Integer>
    The integer a.
    Default: 1
--MyConfigurable.b=<Float>
    The integer b.
    Default: 1.0"""

mc_help_inst = """MyConfigurable(Configurable) options
------------------------------------
--MyConfigurable.a=<Integer>
    The integer a.
    Current: 5
--MyConfigurable.b=<Float>
    The integer b.
    Current: 4.0"""

# On Python 3, the Integer trait is a synonym for Int
mc_help = mc_help.replace("<Integer>", "<Int>")
mc_help_inst = mc_help_inst.replace("<Integer>", "<Int>")


class Foo(Configurable):
    a = Integer(0, help="The integer a.").tag(config=True)
    b = Unicode("nope").tag(config=True)
    flist = List([]).tag(config=True)
    fdict = Dict().tag(config=True)


class Bar(Foo):
    b = Unicode("gotit", help="The string b.").tag(config=False)
    c = Float(help="The string c.").tag(config=True)
    bset = Set([]).tag(config=True, multiplicity="+")
    bset_values = Set([2, 1, 5]).tag(config=True, multiplicity="+")
    bdict = Dict().tag(config=True, multiplicity="+")
    bdict_values = Dict({1: "a", "0": "b", 5: "c"}).tag(config=True, multiplicity="+")


foo_help = """Foo(Configurable) options
-------------------------
--Foo.a=<Int>
    The integer a.
    Default: 0
--Foo.b=<Unicode>
    Default: 'nope'
--Foo.fdict=<key-1>=<value-1>...
    Default: {}
--Foo.flist=<list-item-1>...
    Default: []"""

bar_help = """Bar(Foo) options
----------------
--Bar.a=<Int>
    The integer a.
    Default: 0
--Bar.bdict <key-1>=<value-1>...
    Default: {}
--Bar.bdict_values <key-1>=<value-1>...
    Default: {1: 'a', '0': 'b', 5: 'c'}
--Bar.bset <set-item-1>...
    Default: set()
--Bar.bset_values <set-item-1>...
    Default: {1, 2, 5}
--Bar.c=<Float>
    The string c.
    Default: 0.0
--Bar.fdict=<key-1>=<value-1>...
    Default: {}
--Bar.flist=<list-item-1>...
    Default: []"""


class TestConfigurable(TestCase):
    def test_default(self):
        c1 = Configurable()
        c2 = Configurable(config=c1.config)
        c3 = Configurable(config=c2.config)
        self.assertEqual(c1.config, c2.config)
        self.assertEqual(c2.config, c3.config)

    def test_custom(self):
        config = Config()
        config.foo = "foo"
        config.bar = "bar"
        c1 = Configurable(config=config)
        c2 = Configurable(config=c1.config)
        c3 = Configurable(config=c2.config)
        self.assertEqual(c1.config, config)
        self.assertEqual(c2.config, config)
        self.assertEqual(c3.config, config)
        # Test that copies are not made
        self.assertTrue(c1.config is config)
        self.assertTrue(c2.config is config)
        self.assertTrue(c3.config is config)
        self.assertTrue(c1.config is c2.config)
        self.assertTrue(c2.config is c3.config)

    def test_inheritance(self):
        config = Config()
        config.MyConfigurable.a = 2
        config.MyConfigurable.b = 2.0
        c1 = MyConfigurable(config=config)
        c2 = MyConfigurable(config=c1.config)
        self.assertEqual(c1.a, config.MyConfigurable.a)
        self.assertEqual(c1.b, config.MyConfigurable.b)
        self.assertEqual(c2.a, config.MyConfigurable.a)
        self.assertEqual(c2.b, config.MyConfigurable.b)

    def test_parent(self):
        config = Config()
        config.Foo.a = 10
        config.Foo.b = "wow"
        config.Bar.b = "later"
        config.Bar.c = 100.0
        f = Foo(config=config)
        with expected_warnings(["`b` not recognized"]):
            b = Bar(config=f.config)
        self.assertEqual(f.a, 10)
        self.assertEqual(f.b, "wow")
        self.assertEqual(b.b, "gotit")
        self.assertEqual(b.c, 100.0)

    def test_override1(self):
        config = Config()
        config.MyConfigurable.a = 2
        config.MyConfigurable.b = 2.0
        c = MyConfigurable(a=3, config=config)
        self.assertEqual(c.a, 3)
        self.assertEqual(c.b, config.MyConfigurable.b)
        self.assertEqual(c.c, "no config")

    def test_override2(self):
        config = Config()
        config.Foo.a = 1
        config.Bar.b = "or"  # Up above b is config=False, so this won't do it.
        config.Bar.c = 10.0
        with expected_warnings(["`b` not recognized"]):
            c = Bar(config=config)
        self.assertEqual(c.a, config.Foo.a)
        self.assertEqual(c.b, "gotit")
        self.assertEqual(c.c, config.Bar.c)
        with expected_warnings(["`b` not recognized"]):
            c = Bar(a=2, b="and", c=20.0, config=config)
        self.assertEqual(c.a, 2)
        self.assertEqual(c.b, "and")
        self.assertEqual(c.c, 20.0)

    def test_help(self):
        self.assertEqual(MyConfigurable.class_get_help(), mc_help)
        self.assertEqual(Foo.class_get_help(), foo_help)
        self.assertEqual(Bar.class_get_help(), bar_help)

    def test_help_inst(self):
        inst = MyConfigurable(a=5, b=4)
        self.assertEqual(MyConfigurable.class_get_help(inst), mc_help_inst)

    def test_generated_config_enum_comments(self):
        class MyConf(Configurable):
            an_enum = Enum("Choice1 choice2".split(), help="Many choices.").tag(config=True)

        help_str = "Many choices."
        enum_choices_str = "Choices: any of ['Choice1', 'choice2']"
        rst_choices_str = "MyConf.an_enum : any of ``'Choice1'``|``'choice2'``"
        or_none_str = "or None"

        cls_help = MyConf.class_get_help()

        self.assertIn(help_str, cls_help)
        self.assertIn(enum_choices_str, cls_help)
        self.assertNotIn(or_none_str, cls_help)

        cls_cfg = MyConf.class_config_section()

        self.assertIn(help_str, cls_cfg)
        self.assertIn(enum_choices_str, cls_cfg)
        self.assertNotIn(or_none_str, cls_help)
        # Check order of Help-msg <--> Choices sections
        self.assertGreater(cls_cfg.index(enum_choices_str), cls_cfg.index(help_str))

        rst_help = MyConf.class_config_rst_doc()

        self.assertIn(help_str, rst_help)
        self.assertIn(rst_choices_str, rst_help)
        self.assertNotIn(or_none_str, rst_help)

        class MyConf2(Configurable):
            an_enum = Enum(
                "Choice1 choice2".split(),
                allow_none=True,
                default_value="choice2",
                help="Many choices.",
            ).tag(config=True)

        defaults_str = "Default: 'choice2'"

        cls2_msg = MyConf2.class_get_help()

        self.assertIn(help_str, cls2_msg)
        self.assertIn(enum_choices_str, cls2_msg)
        self.assertIn(or_none_str, cls2_msg)
        self.assertIn(defaults_str, cls2_msg)
        # Check order of Default <--> Choices sections
        self.assertGreater(cls2_msg.index(defaults_str), cls2_msg.index(enum_choices_str))

        cls2_cfg = MyConf2.class_config_section()

        self.assertIn(help_str, cls2_cfg)
        self.assertIn(enum_choices_str, cls2_cfg)
        self.assertIn(or_none_str, cls2_cfg)
        self.assertIn(defaults_str, cls2_cfg)
        # Check order of Default <--> Choices sections
        self.assertGreater(cls2_cfg.index(defaults_str), cls2_cfg.index(enum_choices_str))

    def test_generated_config_strenum_comments(self):
        help_str = "Many choices."
        defaults_str = "Default: 'choice2'"
        or_none_str = "or None"

        class MyConf3(Configurable):
            an_enum = CaselessStrEnum(
                "Choice1 choice2".split(),
                allow_none=True,
                default_value="choice2",
                help="Many choices.",
            ).tag(config=True)

        enum_choices_str = "Choices: any of ['Choice1', 'choice2'] (case-insensitive)"

        cls3_msg = MyConf3.class_get_help()

        self.assertIn(help_str, cls3_msg)
        self.assertIn(enum_choices_str, cls3_msg)
        self.assertIn(or_none_str, cls3_msg)
        self.assertIn(defaults_str, cls3_msg)
        # Check order of Default <--> Choices sections
        self.assertGreater(cls3_msg.index(defaults_str), cls3_msg.index(enum_choices_str))

        cls3_cfg = MyConf3.class_config_section()

        self.assertIn(help_str, cls3_cfg)
        self.assertIn(enum_choices_str, cls3_cfg)
        self.assertIn(or_none_str, cls3_cfg)
        self.assertIn(defaults_str, cls3_cfg)
        # Check order of Default <--> Choices sections
        self.assertGreater(cls3_cfg.index(defaults_str), cls3_cfg.index(enum_choices_str))

        class MyConf4(Configurable):
            an_enum = FuzzyEnum(
                "Choice1 choice2".split(),
                allow_none=True,
                default_value="choice2",
                help="Many choices.",
            ).tag(config=True)

        enum_choices_str = "Choices: any case-insensitive prefix of ['Choice1', 'choice2']"

        cls4_msg = MyConf4.class_get_help()

        self.assertIn(help_str, cls4_msg)
        self.assertIn(enum_choices_str, cls4_msg)
        self.assertIn(or_none_str, cls4_msg)
        self.assertIn(defaults_str, cls4_msg)
        # Check order of Default <--> Choices sections
        self.assertGreater(cls4_msg.index(defaults_str), cls4_msg.index(enum_choices_str))

        cls4_cfg = MyConf4.class_config_section()

        self.assertIn(help_str, cls4_cfg)
        self.assertIn(enum_choices_str, cls4_cfg)
        self.assertIn(or_none_str, cls4_cfg)
        self.assertIn(defaults_str, cls4_cfg)
        # Check order of Default <--> Choices sections
        self.assertGreater(cls4_cfg.index(defaults_str), cls4_cfg.index(enum_choices_str))


class TestSingletonConfigurable(TestCase):
    def test_instance(self):
        class Foo(SingletonConfigurable):
            pass

        self.assertEqual(Foo.initialized(), False)
        foo = Foo.instance()
        self.assertEqual(Foo.initialized(), True)
        self.assertEqual(foo, Foo.instance())
        self.assertEqual(SingletonConfigurable._instance, None)

    def test_inheritance(self):
        class Bar(SingletonConfigurable):
            pass

        class Bam(Bar):
            pass

        self.assertEqual(Bar.initialized(), False)
        self.assertEqual(Bam.initialized(), False)
        bam = Bam.instance()
        self.assertEqual(Bar.initialized(), True)
        self.assertEqual(Bam.initialized(), True)
        self.assertEqual(bam, Bam._instance)
        self.assertEqual(bam, Bar._instance)
        self.assertEqual(SingletonConfigurable._instance, None)


class TestLoggingConfigurable(TestCase):
    def test_parent_logger(self):
        class Parent(LoggingConfigurable):
            pass

        class Child(LoggingConfigurable):
            pass

        log = get_logger().getChild("TestLoggingConfigurable")

        parent = Parent(log=log)
        child = Child(parent=parent)
        self.assertEqual(parent.log, log)
        self.assertEqual(child.log, log)

        parent = Parent()
        child = Child(parent=parent, log=log)
        self.assertEqual(parent.log, get_logger())
        self.assertEqual(child.log, log)

    def test_parent_not_logging_configurable(self):
        class Parent(Configurable):
            pass

        class Child(LoggingConfigurable):
            pass

        parent = Parent()
        child = Child(parent=parent)
        self.assertEqual(child.log, get_logger())


class MyParent(Configurable):
    pass


class MyParent2(MyParent):
    pass


class TestParentConfigurable(TestCase):
    def test_parent_config(self):
        cfg = Config(
            {
                "MyParent": {
                    "MyConfigurable": {
                        "b": 2.0,
                    }
                }
            }
        )
        parent = MyParent(config=cfg)
        myc = MyConfigurable(parent=parent)
        self.assertEqual(myc.b, parent.config.MyParent.MyConfigurable.b)

    def test_parent_inheritance(self):
        cfg = Config(
            {
                "MyParent": {
                    "MyConfigurable": {
                        "b": 2.0,
                    }
                }
            }
        )
        parent = MyParent2(config=cfg)
        myc = MyConfigurable(parent=parent)
        self.assertEqual(myc.b, parent.config.MyParent.MyConfigurable.b)

    def test_multi_parent(self):
        cfg = Config(
            {
                "MyParent2": {
                    "MyParent": {
                        "MyConfigurable": {
                            "b": 2.0,
                        }
                    },
                    # this one shouldn't count
                    "MyConfigurable": {
                        "b": 3.0,
                    },
                }
            }
        )
        parent2 = MyParent2(config=cfg)
        parent = MyParent(parent=parent2)
        myc = MyConfigurable(parent=parent)
        self.assertEqual(myc.b, parent.config.MyParent2.MyParent.MyConfigurable.b)

    def test_parent_priority(self):
        cfg = Config(
            {
                "MyConfigurable": {
                    "b": 2.0,
                },
                "MyParent": {
                    "MyConfigurable": {
                        "b": 3.0,
                    }
                },
                "MyParent2": {
                    "MyConfigurable": {
                        "b": 4.0,
                    }
                },
            }
        )
        parent = MyParent2(config=cfg)
        myc = MyConfigurable(parent=parent)
        self.assertEqual(myc.b, parent.config.MyParent2.MyConfigurable.b)

    def test_multi_parent_priority(self):
        cfg = Config(
            {
                "MyConfigurable": {
                    "b": 2.0,
                },
                "MyParent": {
                    "MyConfigurable": {
                        "b": 3.0,
                    },
                },
                "MyParent2": {
                    "MyConfigurable": {
                        "b": 4.0,
                    },
                    "MyParent": {
                        "MyConfigurable": {
                            "b": 5.0,
                        },
                    },
                },
            }
        )
        parent2 = MyParent2(config=cfg)
        parent = MyParent2(parent=parent2)
        myc = MyConfigurable(parent=parent)
        self.assertEqual(myc.b, parent.config.MyParent2.MyParent.MyConfigurable.b)


class Containers(Configurable):
    lis = List().tag(config=True)

    def _lis_default(self):
        return [-1]

    s = Set().tag(config=True)

    def _s_default(self):
        return {"a"}

    d = Dict().tag(config=True)

    def _d_default(self):
        return {"a": "b"}


class TestConfigContainers(TestCase):
    def test_extend(self):
        c = Config()
        c.Containers.lis.extend(list(range(5)))
        obj = Containers(config=c)
        self.assertEqual(obj.lis, list(range(-1, 5)))

    def test_insert(self):
        c = Config()
        c.Containers.lis.insert(0, "a")
        c.Containers.lis.insert(1, "b")
        obj = Containers(config=c)
        self.assertEqual(obj.lis, ["a", "b", -1])

    def test_prepend(self):
        c = Config()
        c.Containers.lis.prepend([1, 2])
        c.Containers.lis.prepend([2, 3])
        obj = Containers(config=c)
        self.assertEqual(obj.lis, [2, 3, 1, 2, -1])

    def test_prepend_extend(self):
        c = Config()
        c.Containers.lis.prepend([1, 2])
        c.Containers.lis.extend([2, 3])
        obj = Containers(config=c)
        self.assertEqual(obj.lis, [1, 2, -1, 2, 3])

    def test_append_extend(self):
        c = Config()
        c.Containers.lis.append([1, 2])
        c.Containers.lis.extend([2, 3])
        obj = Containers(config=c)
        self.assertEqual(obj.lis, [-1, [1, 2], 2, 3])

    def test_extend_append(self):
        c = Config()
        c.Containers.lis.extend([2, 3])
        c.Containers.lis.append([1, 2])
        obj = Containers(config=c)
        self.assertEqual(obj.lis, [-1, 2, 3, [1, 2]])

    def test_insert_extend(self):
        c = Config()
        c.Containers.lis.insert(0, 1)
        c.Containers.lis.extend([2, 3])
        obj = Containers(config=c)
        self.assertEqual(obj.lis, [1, -1, 2, 3])

    def test_set_update(self):
        c = Config()
        c.Containers.s.update({0, 1, 2})
        c.Containers.s.update({3})
        obj = Containers(config=c)
        self.assertEqual(obj.s, {"a", 0, 1, 2, 3})

    def test_dict_update(self):
        c = Config()
        c.Containers.d.update({"c": "d"})
        c.Containers.d.update({"e": "f"})
        obj = Containers(config=c)
        self.assertEqual(obj.d, {"a": "b", "c": "d", "e": "f"})

    def test_update_twice(self):
        c = Config()
        c.MyConfigurable.a = 5
        m = MyConfigurable(config=c)
        self.assertEqual(m.a, 5)

        c2 = Config()
        c2.MyConfigurable.a = 10
        m.update_config(c2)
        self.assertEqual(m.a, 10)

        c2.MyConfigurable.a = 15
        m.update_config(c2)
        self.assertEqual(m.a, 15)

    def test_update_self(self):
        """update_config with same config object still triggers config_changed"""
        c = Config()
        c.MyConfigurable.a = 5
        m = MyConfigurable(config=c)
        self.assertEqual(m.a, 5)
        c.MyConfigurable.a = 10
        m.update_config(c)
        self.assertEqual(m.a, 10)

    def test_config_default(self):
        class SomeSingleton(SingletonConfigurable):
            pass

        class DefaultConfigurable(Configurable):
            a = Integer().tag(config=True)

            def _config_default(self):
                if SomeSingleton.initialized():
                    return SomeSingleton.instance().config
                return Config()

        c = Config()
        c.DefaultConfigurable.a = 5

        d1 = DefaultConfigurable()
        self.assertEqual(d1.a, 0)

        single = SomeSingleton.instance(config=c)

        d2 = DefaultConfigurable()
        self.assertIs(d2.config, single.config)
        self.assertEqual(d2.a, 5)

    def test_config_default_deprecated(self):
        """Make sure configurables work even with the deprecations in traitlets"""

        class SomeSingleton(SingletonConfigurable):
            pass

        # reset deprecation limiter
        _deprecations_shown.clear()
        with expected_warnings([]):

            class DefaultConfigurable(Configurable):
                a = Integer(config=True)

                def _config_default(self):
                    if SomeSingleton.initialized():
                        return SomeSingleton.instance().config
                    return Config()

        c = Config()
        c.DefaultConfigurable.a = 5

        d1 = DefaultConfigurable()
        self.assertEqual(d1.a, 0)

        single = SomeSingleton.instance(config=c)

        d2 = DefaultConfigurable()
        self.assertIs(d2.config, single.config)
        self.assertEqual(d2.a, 5)

    def test_kwarg_config_priority(self):
        # a, c set in kwargs
        # a, b set in config
        # verify that:
        # - kwargs are set before config
        # - kwargs have priority over config
        class A(Configurable):
            a = Unicode("default", config=True)
            b = Unicode("default", config=True)
            c = Unicode("default", config=True)
            c_during_config = Unicode("never")

            @validate("b")
            def _record_c(self, proposal):
                # setting b from config records c's value at the time
                self.c_during_config = self.c
                return proposal.value

        cfg = Config()
        cfg.A.a = "a-config"
        cfg.A.b = "b-config"
        obj = A(a="a-kwarg", c="c-kwarg", config=cfg)
        assert obj.a == "a-kwarg"
        assert obj.b == "b-config"
        assert obj.c == "c-kwarg"
        assert obj.c_during_config == "c-kwarg"


class TestLogger(TestCase):
    class A(LoggingConfigurable):
        foo = Integer(config=True)
        bar = Integer(config=True)
        baz = Integer(config=True)

    @mark.skipif(not hasattr(TestCase, "assertLogs"), reason="requires TestCase.assertLogs")
    def test_warn_match(self):
        logger = logging.getLogger("test_warn_match")
        cfg = Config({"A": {"bat": 5}})
        with self.assertLogs(logger, logging.WARNING) as captured:
            TestLogger.A(config=cfg, log=logger)

        output = "\n".join(captured.output)
        self.assertIn("Did you mean one of: `bar, baz`?", output)
        self.assertIn("Config option `bat` not recognized by `A`.", output)

        cfg = Config({"A": {"fool": 5}})
        with self.assertLogs(logger, logging.WARNING) as captured:
            TestLogger.A(config=cfg, log=logger)

        output = "\n".join(captured.output)
        self.assertIn("Config option `fool` not recognized by `A`.", output)
        self.assertIn("Did you mean `foo`?", output)

        cfg = Config({"A": {"totally_wrong": 5}})
        with self.assertLogs(logger, logging.WARNING) as captured:
            TestLogger.A(config=cfg, log=logger)

        output = "\n".join(captured.output)
        self.assertIn("Config option `totally_wrong` not recognized by `A`.", output)
        self.assertNotIn("Did you mean", output)


def test_logger_adapter(caplog, capsys):
    logger = logging.getLogger("Application")
    adapter = logging.LoggerAdapter(logger, {"key": "adapted"})

    app = Application(log=adapter, log_level=logging.INFO)
    app.log_format = "%(key)s %(message)s"
    app.log.info("test message")

    assert "adapted test message" in capsys.readouterr().err