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"""Tests for autoreload extension.
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"""
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# -----------------------------------------------------------------------------
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# Copyright (c) 2012 IPython Development Team.
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#
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# Distributed under the terms of the Modified BSD License.
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#
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# The full license is in the file COPYING.txt, distributed with this software.
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# -----------------------------------------------------------------------------
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# -----------------------------------------------------------------------------
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# Imports
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# -----------------------------------------------------------------------------
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import os
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import platform
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import pytest
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import sys
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import tempfile
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import textwrap
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import shutil
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import random
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import time
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from io import StringIO
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import IPython.testing.tools as tt
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from unittest import TestCase
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from IPython.extensions.autoreload import AutoreloadMagics
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from IPython.core.events import EventManager, pre_run_cell
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if platform.python_implementation() == "PyPy":
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pytest.skip(
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"Current autoreload implementation is extremly slow on PyPy",
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allow_module_level=True,
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)
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# -----------------------------------------------------------------------------
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# Test fixture
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# -----------------------------------------------------------------------------
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noop = lambda *a, **kw: None
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class FakeShell:
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def __init__(self):
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self.ns = {}
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self.user_ns = self.ns
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self.user_ns_hidden = {}
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self.events = EventManager(self, {"pre_run_cell", pre_run_cell})
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self.auto_magics = AutoreloadMagics(shell=self)
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self.events.register("pre_run_cell", self.auto_magics.pre_run_cell)
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register_magics = set_hook = noop
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def run_code(self, code):
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self.events.trigger("pre_run_cell")
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exec(code, self.user_ns)
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self.auto_magics.post_execute_hook()
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def push(self, items):
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self.ns.update(items)
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def magic_autoreload(self, parameter):
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self.auto_magics.autoreload(parameter)
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def magic_aimport(self, parameter, stream=None):
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self.auto_magics.aimport(parameter, stream=stream)
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self.auto_magics.post_execute_hook()
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class Fixture(TestCase):
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"""Fixture for creating test module files"""
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test_dir = None
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old_sys_path = None
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filename_chars = "abcdefghijklmopqrstuvwxyz0123456789"
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def setUp(self):
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self.test_dir = tempfile.mkdtemp()
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self.old_sys_path = list(sys.path)
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sys.path.insert(0, self.test_dir)
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self.shell = FakeShell()
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def tearDown(self):
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shutil.rmtree(self.test_dir)
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sys.path = self.old_sys_path
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self.test_dir = None
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self.old_sys_path = None
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self.shell = None
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def get_module(self):
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module_name = "tmpmod_" + "".join(random.sample(self.filename_chars, 20))
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if module_name in sys.modules:
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del sys.modules[module_name]
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file_name = os.path.join(self.test_dir, module_name + ".py")
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return module_name, file_name
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def write_file(self, filename, content):
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"""
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Write a file, and force a timestamp difference of at least one second
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Notes
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-----
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Python's .pyc files record the timestamp of their compilation
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with a time resolution of one second.
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Therefore, we need to force a timestamp difference between .py
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and .pyc, without having the .py file be timestamped in the
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future, and without changing the timestamp of the .pyc file
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(because that is stored in the file). The only reliable way
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to achieve this seems to be to sleep.
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"""
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content = textwrap.dedent(content)
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# Sleep one second + eps
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time.sleep(1.05)
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# Write
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with open(filename, "w") as f:
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f.write(content)
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def new_module(self, code):
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code = textwrap.dedent(code)
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mod_name, mod_fn = self.get_module()
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with open(mod_fn, "w") as f:
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f.write(code)
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return mod_name, mod_fn
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# -----------------------------------------------------------------------------
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# Test automatic reloading
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# -----------------------------------------------------------------------------
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def pickle_get_current_class(obj):
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"""
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Original issue comes from pickle; hence the name.
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"""
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name = obj.__class__.__name__
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module_name = getattr(obj, "__module__", None)
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obj2 = sys.modules[module_name]
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for subpath in name.split("."):
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obj2 = getattr(obj2, subpath)
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return obj2
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class TestAutoreload(Fixture):
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def test_reload_enums(self):
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mod_name, mod_fn = self.new_module(
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textwrap.dedent(
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"""
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from enum import Enum
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class MyEnum(Enum):
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A = 'A'
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B = 'B'
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"""
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)
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)
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self.shell.magic_autoreload("2")
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self.shell.magic_aimport(mod_name)
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self.write_file(
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mod_fn,
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textwrap.dedent(
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"""
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from enum import Enum
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class MyEnum(Enum):
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A = 'A'
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B = 'B'
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C = 'C'
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"""
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),
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)
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with tt.AssertNotPrints(
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("[autoreload of %s failed:" % mod_name), channel="stderr"
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):
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self.shell.run_code("pass") # trigger another reload
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def test_reload_class_type(self):
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self.shell.magic_autoreload("2")
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mod_name, mod_fn = self.new_module(
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"""
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class Test():
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def meth(self):
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return "old"
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"""
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)
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assert "test" not in self.shell.ns
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assert "result" not in self.shell.ns
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self.shell.run_code("from %s import Test" % mod_name)
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self.shell.run_code("test = Test()")
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self.write_file(
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mod_fn,
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"""
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class Test():
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def meth(self):
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return "new"
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""",
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)
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test_object = self.shell.ns["test"]
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# important to trigger autoreload logic !
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self.shell.run_code("pass")
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test_class = pickle_get_current_class(test_object)
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assert isinstance(test_object, test_class)
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# extra check.
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self.shell.run_code("import pickle")
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self.shell.run_code("p = pickle.dumps(test)")
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def test_reload_class_attributes(self):
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self.shell.magic_autoreload("2")
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mod_name, mod_fn = self.new_module(
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textwrap.dedent(
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"""
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class MyClass:
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def __init__(self, a=10):
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self.a = a
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self.b = 22
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# self.toto = 33
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def square(self):
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print('compute square')
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return self.a*self.a
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"""
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)
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)
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self.shell.run_code("from %s import MyClass" % mod_name)
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self.shell.run_code("first = MyClass(5)")
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self.shell.run_code("first.square()")
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with self.assertRaises(AttributeError):
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self.shell.run_code("first.cube()")
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with self.assertRaises(AttributeError):
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self.shell.run_code("first.power(5)")
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self.shell.run_code("first.b")
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with self.assertRaises(AttributeError):
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self.shell.run_code("first.toto")
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# remove square, add power
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self.write_file(
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mod_fn,
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textwrap.dedent(
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"""
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class MyClass:
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def __init__(self, a=10):
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self.a = a
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self.b = 11
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def power(self, p):
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print('compute power '+str(p))
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return self.a**p
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"""
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),
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)
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self.shell.run_code("second = MyClass(5)")
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for object_name in {"first", "second"}:
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self.shell.run_code(f"{object_name}.power(5)")
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with self.assertRaises(AttributeError):
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self.shell.run_code(f"{object_name}.cube()")
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with self.assertRaises(AttributeError):
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self.shell.run_code(f"{object_name}.square()")
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self.shell.run_code(f"{object_name}.b")
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self.shell.run_code(f"{object_name}.a")
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with self.assertRaises(AttributeError):
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self.shell.run_code(f"{object_name}.toto")
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def test_autoload_newly_added_objects(self):
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self.shell.magic_autoreload("3")
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mod_code = """
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def func1(): pass
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"""
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mod_name, mod_fn = self.new_module(textwrap.dedent(mod_code))
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self.shell.run_code(f"from {mod_name} import *")
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self.shell.run_code("func1()")
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with self.assertRaises(NameError):
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self.shell.run_code("func2()")
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with self.assertRaises(NameError):
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self.shell.run_code("t = Test()")
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with self.assertRaises(NameError):
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self.shell.run_code("number")
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# ----------- TEST NEW OBJ LOADED --------------------------
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new_code = """
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def func1(): pass
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def func2(): pass
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class Test: pass
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number = 0
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from enum import Enum
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class TestEnum(Enum):
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A = 'a'
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"""
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self.write_file(mod_fn, textwrap.dedent(new_code))
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# test function now exists in shell's namespace namespace
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self.shell.run_code("func2()")
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# test function now exists in module's dict
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self.shell.run_code(f"import sys; sys.modules['{mod_name}'].func2()")
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# test class now exists
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self.shell.run_code("t = Test()")
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# test global built-in var now exists
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self.shell.run_code("number")
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# test the enumerations gets loaded successfully
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self.shell.run_code("TestEnum.A")
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# ----------- TEST NEW OBJ CAN BE CHANGED --------------------
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new_code = """
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def func1(): return 'changed'
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def func2(): return 'changed'
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class Test:
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def new_func(self):
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return 'changed'
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number = 1
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from enum import Enum
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class TestEnum(Enum):
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A = 'a'
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B = 'added'
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"""
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self.write_file(mod_fn, textwrap.dedent(new_code))
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self.shell.run_code("assert func1() == 'changed'")
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self.shell.run_code("assert func2() == 'changed'")
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self.shell.run_code("t = Test(); assert t.new_func() == 'changed'")
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self.shell.run_code("assert number == 1")
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self.shell.run_code("assert TestEnum.B.value == 'added'")
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# ----------- TEST IMPORT FROM MODULE --------------------------
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new_mod_code = """
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from enum import Enum
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class Ext(Enum):
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A = 'ext'
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def ext_func():
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return 'ext'
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class ExtTest:
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def meth(self):
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return 'ext'
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ext_int = 2
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"""
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new_mod_name, new_mod_fn = self.new_module(textwrap.dedent(new_mod_code))
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current_mod_code = f"""
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from {new_mod_name} import *
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"""
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self.write_file(mod_fn, textwrap.dedent(current_mod_code))
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self.shell.run_code("assert Ext.A.value == 'ext'")
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self.shell.run_code("assert ext_func() == 'ext'")
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self.shell.run_code("t = ExtTest(); assert t.meth() == 'ext'")
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self.shell.run_code("assert ext_int == 2")
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def _check_smoketest(self, use_aimport=True):
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"""
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Functional test for the automatic reloader using either
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'%autoreload 1' or '%autoreload 2'
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"""
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mod_name, mod_fn = self.new_module(
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"""
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x = 9
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z = 123 # this item will be deleted
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def foo(y):
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return y + 3
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class Baz(object):
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def __init__(self, x):
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self.x = x
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def bar(self, y):
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return self.x + y
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@property
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def quux(self):
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return 42
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def zzz(self):
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'''This method will be deleted below'''
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return 99
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class Bar: # old-style class: weakref doesn't work for it on Python < 2.7
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def foo(self):
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return 1
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"""
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)
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#
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# Import module, and mark for reloading
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#
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if use_aimport:
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self.shell.magic_autoreload("1")
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self.shell.magic_aimport(mod_name)
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stream = StringIO()
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self.shell.magic_aimport("", stream=stream)
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self.assertIn(("Modules to reload:\n%s" % mod_name), stream.getvalue())
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with self.assertRaises(ImportError):
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self.shell.magic_aimport("tmpmod_as318989e89ds")
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else:
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self.shell.magic_autoreload("2")
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self.shell.run_code("import %s" % mod_name)
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stream = StringIO()
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self.shell.magic_aimport("", stream=stream)
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self.assertTrue(
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"Modules to reload:\nall-except-skipped" in stream.getvalue()
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)
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self.assertIn(mod_name, self.shell.ns)
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mod = sys.modules[mod_name]
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#
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# Test module contents
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#
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old_foo = mod.foo
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old_obj = mod.Baz(9)
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old_obj2 = mod.Bar()
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def check_module_contents():
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self.assertEqual(mod.x, 9)
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self.assertEqual(mod.z, 123)
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self.assertEqual(old_foo(0), 3)
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self.assertEqual(mod.foo(0), 3)
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obj = mod.Baz(9)
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self.assertEqual(old_obj.bar(1), 10)
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self.assertEqual(obj.bar(1), 10)
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self.assertEqual(obj.quux, 42)
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self.assertEqual(obj.zzz(), 99)
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obj2 = mod.Bar()
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self.assertEqual(old_obj2.foo(), 1)
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self.assertEqual(obj2.foo(), 1)
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check_module_contents()
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#
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# Simulate a failed reload: no reload should occur and exactly
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# one error message should be printed
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#
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self.write_file(
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mod_fn,
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"""
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a syntax error
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""",
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)
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with tt.AssertPrints(
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("[autoreload of %s failed:" % mod_name), channel="stderr"
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):
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self.shell.run_code("pass") # trigger reload
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with tt.AssertNotPrints(
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("[autoreload of %s failed:" % mod_name), channel="stderr"
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):
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self.shell.run_code("pass") # trigger another reload
|
|
|
check_module_contents()
|
|
|
|
|
|
#
|
|
|
# Rewrite module (this time reload should succeed)
|
|
|
#
|
|
|
self.write_file(
|
|
|
mod_fn,
|
|
|
"""
|
|
|
x = 10
|
|
|
|
|
|
def foo(y):
|
|
|
return y + 4
|
|
|
|
|
|
class Baz(object):
|
|
|
def __init__(self, x):
|
|
|
self.x = x
|
|
|
def bar(self, y):
|
|
|
return self.x + y + 1
|
|
|
@property
|
|
|
def quux(self):
|
|
|
return 43
|
|
|
|
|
|
class Bar: # old-style class
|
|
|
def foo(self):
|
|
|
return 2
|
|
|
""",
|
|
|
)
|
|
|
|
|
|
def check_module_contents():
|
|
|
self.assertEqual(mod.x, 10)
|
|
|
self.assertFalse(hasattr(mod, "z"))
|
|
|
|
|
|
self.assertEqual(old_foo(0), 4) # superreload magic!
|
|
|
self.assertEqual(mod.foo(0), 4)
|
|
|
|
|
|
obj = mod.Baz(9)
|
|
|
self.assertEqual(old_obj.bar(1), 11) # superreload magic!
|
|
|
self.assertEqual(obj.bar(1), 11)
|
|
|
|
|
|
self.assertEqual(old_obj.quux, 43)
|
|
|
self.assertEqual(obj.quux, 43)
|
|
|
|
|
|
self.assertFalse(hasattr(old_obj, "zzz"))
|
|
|
self.assertFalse(hasattr(obj, "zzz"))
|
|
|
|
|
|
obj2 = mod.Bar()
|
|
|
self.assertEqual(old_obj2.foo(), 2)
|
|
|
self.assertEqual(obj2.foo(), 2)
|
|
|
|
|
|
self.shell.run_code("pass") # trigger reload
|
|
|
check_module_contents()
|
|
|
|
|
|
#
|
|
|
# Another failure case: deleted file (shouldn't reload)
|
|
|
#
|
|
|
os.unlink(mod_fn)
|
|
|
|
|
|
self.shell.run_code("pass") # trigger reload
|
|
|
check_module_contents()
|
|
|
|
|
|
#
|
|
|
# Disable autoreload and rewrite module: no reload should occur
|
|
|
#
|
|
|
if use_aimport:
|
|
|
self.shell.magic_aimport("-" + mod_name)
|
|
|
stream = StringIO()
|
|
|
self.shell.magic_aimport("", stream=stream)
|
|
|
self.assertTrue(("Modules to skip:\n%s" % mod_name) in stream.getvalue())
|
|
|
|
|
|
# This should succeed, although no such module exists
|
|
|
self.shell.magic_aimport("-tmpmod_as318989e89ds")
|
|
|
else:
|
|
|
self.shell.magic_autoreload("0")
|
|
|
|
|
|
self.write_file(
|
|
|
mod_fn,
|
|
|
"""
|
|
|
x = -99
|
|
|
""",
|
|
|
)
|
|
|
|
|
|
self.shell.run_code("pass") # trigger reload
|
|
|
self.shell.run_code("pass")
|
|
|
check_module_contents()
|
|
|
|
|
|
#
|
|
|
# Re-enable autoreload: reload should now occur
|
|
|
#
|
|
|
if use_aimport:
|
|
|
self.shell.magic_aimport(mod_name)
|
|
|
else:
|
|
|
self.shell.magic_autoreload("")
|
|
|
|
|
|
self.shell.run_code("pass") # trigger reload
|
|
|
self.assertEqual(mod.x, -99)
|
|
|
|
|
|
def test_smoketest_aimport(self):
|
|
|
self._check_smoketest(use_aimport=True)
|
|
|
|
|
|
def test_smoketest_autoreload(self):
|
|
|
self._check_smoketest(use_aimport=False)
|
|
|
|
