IPython/core/tests/test_magic.py

# -*- coding: utf-8 -*-
"""Tests for various magic functions."""

import asyncio
import io
import os
import re
import shlex
import sys
import warnings
from importlib import invalidate_caches
from io import StringIO
from pathlib import Path
from textwrap import dedent
from unittest import TestCase, mock

import pytest

from IPython import get_ipython
from IPython.core import magic
from IPython.core.error import UsageError
from IPython.core.magic import (
    Magics,
    cell_magic,
    line_magic,
    magics_class,
    register_cell_magic,
    register_line_magic,
)
from IPython.core.magics import code, execution, logging, osm, script
from IPython.testing import decorators as dec
from IPython.testing import tools as tt
from IPython.utils.io import capture_output
from IPython.utils.process import find_cmd
from IPython.utils.tempdir import TemporaryDirectory, TemporaryWorkingDirectory

from .test_debugger import PdbTestInput


@magic.magics_class
class DummyMagics(magic.Magics): pass

def test_extract_code_ranges():
    instr = "1 3 5-6 7-9 10:15 17: :10 10- -13 :"
    expected = [
        (0, 1),
        (2, 3),
        (4, 6),
        (6, 9),
        (9, 14),
        (16, None),
        (None, 9),
        (9, None),
        (None, 13),
        (None, None),
    ]
    actual = list(code.extract_code_ranges(instr))
    assert actual == expected

def test_extract_symbols():
    source = """import foo\na = 10\ndef b():\n    return 42\n\n\nclass A: pass\n\n\n"""
    symbols_args = ["a", "b", "A", "A,b", "A,a", "z"]
    expected = [([], ['a']),
                (["def b():\n    return 42\n"], []),
                (["class A: pass\n"], []),
                (["class A: pass\n", "def b():\n    return 42\n"], []),
                (["class A: pass\n"], ['a']),
                ([], ['z'])]
    for symbols, exp in zip(symbols_args, expected):
        assert code.extract_symbols(source, symbols) == exp


def test_extract_symbols_raises_exception_with_non_python_code():
    source = ("=begin A Ruby program :)=end\n"
              "def hello\n"
              "puts 'Hello world'\n"
              "end")
    with pytest.raises(SyntaxError):
        code.extract_symbols(source, "hello")


def test_magic_not_found():
    # magic not found raises UsageError
    with pytest.raises(UsageError):
        _ip.magic('doesntexist')

    # ensure result isn't success when a magic isn't found
    result = _ip.run_cell('%doesntexist')
    assert isinstance(result.error_in_exec, UsageError)


def test_cell_magic_not_found():
    # magic not found raises UsageError
    with pytest.raises(UsageError):
        _ip.run_cell_magic('doesntexist', 'line', 'cell')

    # ensure result isn't success when a magic isn't found
    result = _ip.run_cell('%%doesntexist')
    assert isinstance(result.error_in_exec, UsageError)


def test_magic_error_status():
    def fail(shell):
        1/0
    _ip.register_magic_function(fail)
    result = _ip.run_cell('%fail')
    assert isinstance(result.error_in_exec, ZeroDivisionError)


def test_config():
    """ test that config magic does not raise
    can happen if Configurable init is moved too early into
    Magics.__init__ as then a Config object will be registered as a
    magic.
    """
    ## should not raise.
    _ip.magic('config')

def test_config_available_configs():
    """ test that config magic prints available configs in unique and
    sorted order. """
    with capture_output() as captured:
        _ip.magic('config')

    stdout = captured.stdout
    config_classes = stdout.strip().split('\n')[1:]
    assert config_classes == sorted(set(config_classes))

def test_config_print_class():
    """ test that config with a classname prints the class's options. """
    with capture_output() as captured:
        _ip.magic('config TerminalInteractiveShell')

    stdout = captured.stdout
    assert re.match(
        "TerminalInteractiveShell.* options", stdout.splitlines()[0]
    ), f"{stdout}\n\n1st line of stdout not like 'TerminalInteractiveShell.* options'"


def test_rehashx():
    # clear up everything
    _ip.alias_manager.clear_aliases()
    del _ip.db['syscmdlist']

    _ip.magic('rehashx')
    # Practically ALL ipython development systems will have more than 10 aliases

    assert len(_ip.alias_manager.aliases) > 10
    for name, cmd in _ip.alias_manager.aliases:
        # we must strip dots from alias names
        assert "." not in name

    # rehashx must fill up syscmdlist
    scoms = _ip.db['syscmdlist']
    assert len(scoms) > 10


def test_magic_parse_options():
    """Test that we don't mangle paths when parsing magic options."""
    ip = get_ipython()
    path = 'c:\\x'
    m = DummyMagics(ip)
    opts = m.parse_options('-f %s' % path,'f:')[0]
    # argv splitting is os-dependent
    if os.name == 'posix':
        expected = 'c:x'
    else:
        expected = path
    assert opts["f"] == expected


def test_magic_parse_long_options():
    """Magic.parse_options can handle --foo=bar long options"""
    ip = get_ipython()
    m = DummyMagics(ip)
    opts, _ = m.parse_options("--foo --bar=bubble", "a", "foo", "bar=")
    assert "foo" in opts
    assert "bar" in opts
    assert opts["bar"] == "bubble"


def doctest_hist_f():
    """Test %hist -f with temporary filename.

    In [9]: import tempfile

    In [10]: tfile = tempfile.mktemp('.py','tmp-ipython-')

    In [11]: %hist -nl -f $tfile 3

    In [13]: import os; os.unlink(tfile)
    """


def doctest_hist_op():
    """Test %hist -op

    In [1]: class b(float):
       ...:     pass
       ...:

    In [2]: class s(object):
       ...:     def __str__(self):
       ...:         return 's'
       ...:

    In [3]:

    In [4]: class r(b):
       ...:     def __repr__(self):
       ...:         return 'r'
       ...:

    In [5]: class sr(s,r): pass
       ...:

    In [6]:

    In [7]: bb=b()

    In [8]: ss=s()

    In [9]: rr=r()

    In [10]: ssrr=sr()

    In [11]: 4.5
    Out[11]: 4.5

    In [12]: str(ss)
    Out[12]: 's'

    In [13]:

    In [14]: %hist -op
    >>> class b:
    ...     pass
    ...
    >>> class s(b):
    ...     def __str__(self):
    ...         return 's'
    ...
    >>>
    >>> class r(b):
    ...     def __repr__(self):
    ...         return 'r'
    ...
    >>> class sr(s,r): pass
    >>>
    >>> bb=b()
    >>> ss=s()
    >>> rr=r()
    >>> ssrr=sr()
    >>> 4.5
    4.5
    >>> str(ss)
    's'
    >>>
    """

def test_hist_pof():
    ip = get_ipython()
    ip.run_cell("1+2", store_history=True)
    #raise Exception(ip.history_manager.session_number)
    #raise Exception(list(ip.history_manager._get_range_session()))
    with TemporaryDirectory() as td:
        tf = os.path.join(td, 'hist.py')
        ip.run_line_magic('history', '-pof %s' % tf)
        assert os.path.isfile(tf)


def test_macro():
    ip = get_ipython()
    ip.history_manager.reset()   # Clear any existing history.
    cmds = ["a=1", "def b():\n  return a**2", "print(a,b())"]
    for i, cmd in enumerate(cmds, start=1):
        ip.history_manager.store_inputs(i, cmd)
    ip.magic("macro test 1-3")
    assert ip.user_ns["test"].value == "\n".join(cmds) + "\n"

    # List macros
    assert "test" in ip.magic("macro")


def test_macro_run():
    """Test that we can run a multi-line macro successfully."""
    ip = get_ipython()
    ip.history_manager.reset()
    cmds = ["a=10", "a+=1", "print(a)", "%macro test 2-3"]
    for cmd in cmds:
        ip.run_cell(cmd, store_history=True)
    assert ip.user_ns["test"].value == "a+=1\nprint(a)\n"
    with tt.AssertPrints("12"):
        ip.run_cell("test")
    with tt.AssertPrints("13"):
        ip.run_cell("test")


def test_magic_magic():
    """Test %magic"""
    ip = get_ipython()
    with capture_output() as captured:
        ip.magic("magic")

    stdout = captured.stdout
    assert "%magic" in stdout
    assert "IPython" in stdout
    assert "Available" in stdout


@dec.skipif_not_numpy
def test_numpy_reset_array_undec():
    "Test '%reset array' functionality"
    _ip.ex("import numpy as np")
    _ip.ex("a = np.empty(2)")
    assert "a" in _ip.user_ns
    _ip.magic("reset -f array")
    assert "a" not in _ip.user_ns


def test_reset_out():
    "Test '%reset out' magic"
    _ip.run_cell("parrot = 'dead'", store_history=True)
    # test '%reset -f out', make an Out prompt
    _ip.run_cell("parrot", store_history=True)
    assert "dead" in [_ip.user_ns[x] for x in ("_", "__", "___")]
    _ip.magic("reset -f out")
    assert "dead" not in [_ip.user_ns[x] for x in ("_", "__", "___")]
    assert len(_ip.user_ns["Out"]) == 0


def test_reset_in():
    "Test '%reset in' magic"
    # test '%reset -f in'
    _ip.run_cell("parrot", store_history=True)
    assert "parrot" in [_ip.user_ns[x] for x in ("_i", "_ii", "_iii")]
    _ip.magic("%reset -f in")
    assert "parrot" not in [_ip.user_ns[x] for x in ("_i", "_ii", "_iii")]
    assert len(set(_ip.user_ns["In"])) == 1


def test_reset_dhist():
    "Test '%reset dhist' magic"
    _ip.run_cell("tmp = [d for d in _dh]")  # copy before clearing
    _ip.magic("cd " + os.path.dirname(pytest.__file__))
    _ip.magic("cd -")
    assert len(_ip.user_ns["_dh"]) > 0
    _ip.magic("reset -f dhist")
    assert len(_ip.user_ns["_dh"]) == 0
    _ip.run_cell("_dh = [d for d in tmp]")  # restore


def test_reset_in_length():
    "Test that '%reset in' preserves In[] length"
    _ip.run_cell("print 'foo'")
    _ip.run_cell("reset -f in")
    assert len(_ip.user_ns["In"]) == _ip.displayhook.prompt_count + 1


class TestResetErrors(TestCase):

    def test_reset_redefine(self):

        @magics_class
        class KernelMagics(Magics):
              @line_magic
              def less(self, shell): pass

        _ip.register_magics(KernelMagics)

        with self.assertLogs() as cm:
            # hack, we want to just capture logs, but assertLogs fails if not
            # logs get produce.
            # so log one things we ignore.
            import logging as log_mod
            log = log_mod.getLogger()
            log.info('Nothing')
            # end hack.
            _ip.run_cell("reset -f")

        assert len(cm.output) == 1
        for out in cm.output:
            assert "Invalid alias" not in out

def test_tb_syntaxerror():
    """test %tb after a SyntaxError"""
    ip = get_ipython()
    ip.run_cell("for")

    # trap and validate stdout
    save_stdout = sys.stdout
    try:
        sys.stdout = StringIO()
        ip.run_cell("%tb")
        out = sys.stdout.getvalue()
    finally:
        sys.stdout = save_stdout
    # trim output, and only check the last line
    last_line = out.rstrip().splitlines()[-1].strip()
    assert last_line == "SyntaxError: invalid syntax"


def test_time():
    ip = get_ipython()

    with tt.AssertPrints("Wall time: "):
        ip.run_cell("%time None")

    ip.run_cell("def f(kmjy):\n"
                "    %time print (2*kmjy)")

    with tt.AssertPrints("Wall time: "):
        with tt.AssertPrints("hihi", suppress=False):
            ip.run_cell("f('hi')")

def test_time_last_not_expression():
    ip.run_cell("%%time\n"
                "var_1 = 1\n"
                "var_2 = 2\n")
    assert ip.user_ns['var_1'] == 1
    del ip.user_ns['var_1']
    assert ip.user_ns['var_2'] == 2
    del ip.user_ns['var_2']


@dec.skip_win32
def test_time2():
    ip = get_ipython()

    with tt.AssertPrints("CPU times: user "):
        ip.run_cell("%time None")

def test_time3():
    """Erroneous magic function calls, issue gh-3334"""
    ip = get_ipython()
    ip.user_ns.pop('run', None)

    with tt.AssertNotPrints("not found", channel='stderr'):
        ip.run_cell("%%time\n"
                    "run = 0\n"
                    "run += 1")

def test_multiline_time():
    """Make sure last statement from time return a value."""
    ip = get_ipython()
    ip.user_ns.pop('run', None)

    ip.run_cell(dedent("""\
        %%time
        a = "ho"
        b = "hey"
        a+b
        """
        )
    )
    assert ip.user_ns_hidden["_"] == "hohey"


def test_time_local_ns():
    """
    Test that local_ns is actually global_ns when running a cell magic
    """
    ip = get_ipython()
    ip.run_cell("%%time\n" "myvar = 1")
    assert ip.user_ns["myvar"] == 1
    del ip.user_ns["myvar"]


def test_doctest_mode():
    "Toggle doctest_mode twice, it should be a no-op and run without error"
    _ip.magic('doctest_mode')
    _ip.magic('doctest_mode')


def test_parse_options():
    """Tests for basic options parsing in magics."""
    # These are only the most minimal of tests, more should be added later.  At
    # the very least we check that basic text/unicode calls work OK.
    m = DummyMagics(_ip)
    assert m.parse_options("foo", "")[1] == "foo"
    assert m.parse_options("foo", "")[1] == "foo"


def test_parse_options_preserve_non_option_string():
    """Test to assert preservation of non-option part of magic-block, while parsing magic options."""
    m = DummyMagics(_ip)
    opts, stmt = m.parse_options(
        " -n1  -r 13 _ = 314 + foo", "n:r:", preserve_non_opts=True
    )
    assert opts == {"n": "1", "r": "13"}
    assert stmt == "_ = 314 + foo"


def test_run_magic_preserve_code_block():
    """Test to assert preservation of non-option part of magic-block, while running magic."""
    _ip.user_ns["spaces"] = []
    _ip.magic("timeit -n1 -r1 spaces.append([s.count(' ') for s in ['document']])")
    assert _ip.user_ns["spaces"] == [[0]]


def test_dirops():
    """Test various directory handling operations."""
    # curpath = lambda :os.path.splitdrive(os.getcwd())[1].replace('\\','/')
    curpath = os.getcwd
    startdir = os.getcwd()
    ipdir = os.path.realpath(_ip.ipython_dir)
    try:
        _ip.magic('cd "%s"' % ipdir)
        assert curpath() == ipdir
        _ip.magic('cd -')
        assert curpath() == startdir
        _ip.magic('pushd "%s"' % ipdir)
        assert curpath() == ipdir
        _ip.magic('popd')
        assert curpath() == startdir
    finally:
        os.chdir(startdir)


def test_cd_force_quiet():
    """Test OSMagics.cd_force_quiet option"""
    _ip.config.OSMagics.cd_force_quiet = True
    osmagics = osm.OSMagics(shell=_ip)

    startdir = os.getcwd()
    ipdir = os.path.realpath(_ip.ipython_dir)

    try:
        with tt.AssertNotPrints(ipdir):
            osmagics.cd('"%s"' % ipdir)
        with tt.AssertNotPrints(startdir):
            osmagics.cd('-')
    finally:
        os.chdir(startdir)


def test_xmode():
    # Calling xmode three times should be a no-op
    xmode = _ip.InteractiveTB.mode
    for i in range(4):
        _ip.magic("xmode")
    assert _ip.InteractiveTB.mode == xmode

def test_reset_hard():
    monitor = []
    class A(object):
        def __del__(self):
            monitor.append(1)
        def __repr__(self):
            return "<A instance>"

    _ip.user_ns["a"] = A()
    _ip.run_cell("a")

    assert monitor == []
    _ip.magic("reset -f")
    assert monitor == [1]

class TestXdel(tt.TempFileMixin):
    def test_xdel(self):
        """Test that references from %run are cleared by xdel."""
        src = ("class A(object):\n"
               "    monitor = []\n"
               "    def __del__(self):\n"
               "        self.monitor.append(1)\n"
               "a = A()\n")
        self.mktmp(src)
        # %run creates some hidden references...
        _ip.magic("run %s" % self.fname)
        # ... as does the displayhook.
        _ip.run_cell("a")

        monitor = _ip.user_ns["A"].monitor
        assert monitor == []

        _ip.magic("xdel a")

        # Check that a's __del__ method has been called.
        assert monitor == [1]

def doctest_who():
    """doctest for %who

    In [1]: %reset -sf

    In [2]: alpha = 123

    In [3]: beta = 'beta'

    In [4]: %who int
    alpha

    In [5]: %who str
    beta

    In [6]: %whos
    Variable   Type    Data/Info
    ----------------------------
    alpha      int     123
    beta       str     beta

    In [7]: %who_ls
    Out[7]: ['alpha', 'beta']
    """

def test_whos():
    """Check that whos is protected against objects where repr() fails."""
    class A(object):
        def __repr__(self):
            raise Exception()
    _ip.user_ns['a'] = A()
    _ip.magic("whos")

def doctest_precision():
    """doctest for %precision

    In [1]: f = get_ipython().display_formatter.formatters['text/plain']

    In [2]: %precision 5
    Out[2]: '%.5f'

    In [3]: f.float_format
    Out[3]: '%.5f'

    In [4]: %precision %e
    Out[4]: '%e'

    In [5]: f(3.1415927)
    Out[5]: '3.141593e+00'
    """

def test_debug_magic():
    """Test debugging a small code with %debug

    In [1]: with PdbTestInput(['c']):
       ...:     %debug print("a b") #doctest: +ELLIPSIS
       ...:
    ...
    ipdb> c
    a b
    In [2]:
    """

def test_psearch():
    with tt.AssertPrints("dict.fromkeys"):
        _ip.run_cell("dict.fr*?")
    with tt.AssertPrints("π.is_integer"):
        _ip.run_cell("π = 3.14;\nπ.is_integ*?")

def test_timeit_shlex():
    """test shlex issues with timeit (#1109)"""
    _ip.ex("def f(*a,**kw): pass")
    _ip.magic('timeit -n1 "this is a bug".count(" ")')
    _ip.magic('timeit -r1 -n1 f(" ", 1)')
    _ip.magic('timeit -r1 -n1 f(" ", 1, " ", 2, " ")')
    _ip.magic('timeit -r1 -n1 ("a " + "b")')
    _ip.magic('timeit -r1 -n1 f("a " + "b")')
    _ip.magic('timeit -r1 -n1 f("a " + "b ")')


def test_timeit_special_syntax():
    "Test %%timeit with IPython special syntax"
    @register_line_magic
    def lmagic(line):
        ip = get_ipython()
        ip.user_ns['lmagic_out'] = line

    # line mode test
    _ip.run_line_magic("timeit", "-n1 -r1 %lmagic my line")
    assert _ip.user_ns["lmagic_out"] == "my line"
    # cell mode test
    _ip.run_cell_magic("timeit", "-n1 -r1", "%lmagic my line2")
    assert _ip.user_ns["lmagic_out"] == "my line2"


def test_timeit_return():
    """
    test whether timeit -o return object
    """

    res = _ip.run_line_magic('timeit','-n10 -r10 -o 1')
    assert(res is not None)

def test_timeit_quiet():
    """
    test quiet option of timeit magic
    """
    with tt.AssertNotPrints("loops"):
        _ip.run_cell("%timeit -n1 -r1 -q 1")

def test_timeit_return_quiet():
    with tt.AssertNotPrints("loops"):
        res = _ip.run_line_magic('timeit', '-n1 -r1 -q -o 1')
    assert (res is not None)

def test_timeit_invalid_return():
    with pytest.raises(SyntaxError):
        _ip.run_line_magic('timeit', 'return')

@dec.skipif(execution.profile is None)
def test_prun_special_syntax():
    "Test %%prun with IPython special syntax"
    @register_line_magic
    def lmagic(line):
        ip = get_ipython()
        ip.user_ns['lmagic_out'] = line

    # line mode test
    _ip.run_line_magic("prun", "-q %lmagic my line")
    assert _ip.user_ns["lmagic_out"] == "my line"
    # cell mode test
    _ip.run_cell_magic("prun", "-q", "%lmagic my line2")
    assert _ip.user_ns["lmagic_out"] == "my line2"


@dec.skipif(execution.profile is None)
def test_prun_quotes():
    "Test that prun does not clobber string escapes (GH #1302)"
    _ip.magic(r"prun -q x = '\t'")
    assert _ip.user_ns["x"] == "\t"


def test_extension():
    # Debugging information for failures of this test
    print('sys.path:')
    for p in sys.path:
        print(' ', p)
    print('CWD', os.getcwd())

    pytest.raises(ImportError, _ip.magic, "load_ext daft_extension")
    daft_path = os.path.join(os.path.dirname(__file__), "daft_extension")
    sys.path.insert(0, daft_path)
    try:
        _ip.user_ns.pop('arq', None)
        invalidate_caches()   # Clear import caches
        _ip.magic("load_ext daft_extension")
        assert _ip.user_ns["arq"] == 185
        _ip.magic("unload_ext daft_extension")
        assert 'arq' not in _ip.user_ns
    finally:
        sys.path.remove(daft_path)


def test_notebook_export_json():
    pytest.importorskip("nbformat")
    _ip = get_ipython()
    _ip.history_manager.reset()   # Clear any existing history.
    cmds = ["a=1", "def b():\n  return a**2", "print('noël, été', b())"]
    for i, cmd in enumerate(cmds, start=1):
        _ip.history_manager.store_inputs(i, cmd)
    with TemporaryDirectory() as td:
        outfile = os.path.join(td, "nb.ipynb")
        _ip.magic("notebook -e %s" % outfile)


class TestEnv(TestCase):

    def test_env(self):
        env = _ip.magic("env")
        self.assertTrue(isinstance(env, dict))

    def test_env_secret(self):
        env = _ip.magic("env")
        hidden = "<hidden>"
        with mock.patch.dict(
            os.environ,
            {
                "API_KEY": "abc123",
                "SECRET_THING": "ssshhh",
                "JUPYTER_TOKEN": "",
                "VAR": "abc"
            }
        ):
            env = _ip.magic("env")
        assert env["API_KEY"] == hidden
        assert env["SECRET_THING"] == hidden
        assert env["JUPYTER_TOKEN"] == hidden
        assert env["VAR"] == "abc"

    def test_env_get_set_simple(self):
        env = _ip.magic("env var val1")
        self.assertEqual(env, None)
        self.assertEqual(os.environ['var'], 'val1')
        self.assertEqual(_ip.magic("env var"), 'val1')
        env = _ip.magic("env var=val2")
        self.assertEqual(env, None)
        self.assertEqual(os.environ['var'], 'val2')

    def test_env_get_set_complex(self):
        env = _ip.magic("env var 'val1 '' 'val2")
        self.assertEqual(env, None)
        self.assertEqual(os.environ['var'], "'val1 '' 'val2")
        self.assertEqual(_ip.magic("env var"), "'val1 '' 'val2")
        env = _ip.magic('env var=val2 val3="val4')
        self.assertEqual(env, None)
        self.assertEqual(os.environ['var'], 'val2 val3="val4')

    def test_env_set_bad_input(self):
        self.assertRaises(UsageError, lambda: _ip.magic("set_env var"))

    def test_env_set_whitespace(self):
        self.assertRaises(UsageError, lambda: _ip.magic("env var A=B"))


class CellMagicTestCase(TestCase):

    def check_ident(self, magic):
        # Manually called, we get the result
        out = _ip.run_cell_magic(magic, "a", "b")
        assert out == ("a", "b")
        # Via run_cell, it goes into the user's namespace via displayhook
        _ip.run_cell("%%" + magic + " c\nd\n")
        assert _ip.user_ns["_"] == ("c", "d\n")

    def test_cell_magic_func_deco(self):
        "Cell magic using simple decorator"
        @register_cell_magic
        def cellm(line, cell):
            return line, cell

        self.check_ident('cellm')

    def test_cell_magic_reg(self):
        "Cell magic manually registered"
        def cellm(line, cell):
            return line, cell

        _ip.register_magic_function(cellm, 'cell', 'cellm2')
        self.check_ident('cellm2')

    def test_cell_magic_class(self):
        "Cell magics declared via a class"
        @magics_class
        class MyMagics(Magics):

            @cell_magic
            def cellm3(self, line, cell):
                return line, cell

        _ip.register_magics(MyMagics)
        self.check_ident('cellm3')

    def test_cell_magic_class2(self):
        "Cell magics declared via a class, #2"
        @magics_class
        class MyMagics2(Magics):

            @cell_magic('cellm4')
            def cellm33(self, line, cell):
                return line, cell

        _ip.register_magics(MyMagics2)
        self.check_ident('cellm4')
        # Check that nothing is registered as 'cellm33'
        c33 = _ip.find_cell_magic('cellm33')
        assert c33 == None

def test_file():
    """Basic %%writefile"""
    ip = get_ipython()
    with TemporaryDirectory() as td:
        fname = os.path.join(td, 'file1')
        ip.run_cell_magic("writefile", fname, u'\n'.join([
            'line1',
            'line2',
        ]))
        s = Path(fname).read_text()
        assert "line1\n" in s
        assert "line2" in s


@dec.skip_win32
def test_file_single_quote():
    """Basic %%writefile with embedded single quotes"""
    ip = get_ipython()
    with TemporaryDirectory() as td:
        fname = os.path.join(td, '\'file1\'')
        ip.run_cell_magic("writefile", fname, u'\n'.join([
            'line1',
            'line2',
        ]))
        s = Path(fname).read_text()
        assert "line1\n" in s
        assert "line2" in s


@dec.skip_win32
def test_file_double_quote():
    """Basic %%writefile with embedded double quotes"""
    ip = get_ipython()
    with TemporaryDirectory() as td:
        fname = os.path.join(td, '"file1"')
        ip.run_cell_magic("writefile", fname, u'\n'.join([
            'line1',
            'line2',
        ]))
        s = Path(fname).read_text()
        assert "line1\n" in s
        assert "line2" in s


def test_file_var_expand():
    """%%writefile $filename"""
    ip = get_ipython()
    with TemporaryDirectory() as td:
        fname = os.path.join(td, 'file1')
        ip.user_ns['filename'] = fname
        ip.run_cell_magic("writefile", '$filename', u'\n'.join([
            'line1',
            'line2',
        ]))
        s = Path(fname).read_text()
        assert "line1\n" in s
        assert "line2" in s


def test_file_unicode():
    """%%writefile with unicode cell"""
    ip = get_ipython()
    with TemporaryDirectory() as td:
        fname = os.path.join(td, 'file1')
        ip.run_cell_magic("writefile", fname, u'\n'.join([
            u'liné1',
            u'liné2',
        ]))
        with io.open(fname, encoding='utf-8') as f:
            s = f.read()
        assert "liné1\n" in s
        assert "liné2" in s


def test_file_amend():
    """%%writefile -a amends files"""
    ip = get_ipython()
    with TemporaryDirectory() as td:
        fname = os.path.join(td, 'file2')
        ip.run_cell_magic("writefile", fname, u'\n'.join([
            'line1',
            'line2',
        ]))
        ip.run_cell_magic("writefile", "-a %s" % fname, u'\n'.join([
            'line3',
            'line4',
        ]))
        s = Path(fname).read_text()
        assert "line1\n" in s
        assert "line3\n" in s


def test_file_spaces():
    """%%file with spaces in filename"""
    ip = get_ipython()
    with TemporaryWorkingDirectory() as td:
        fname = "file name"
        ip.run_cell_magic("file", '"%s"'%fname, u'\n'.join([
            'line1',
            'line2',
        ]))
        s = Path(fname).read_text()
        assert "line1\n" in s
        assert "line2" in s


def test_script_config():
    ip = get_ipython()
    ip.config.ScriptMagics.script_magics = ['whoda']
    sm = script.ScriptMagics(shell=ip)
    assert "whoda" in sm.magics["cell"]


@pytest.fixture
def event_loop():
    yield asyncio.get_event_loop_policy().get_event_loop()


@dec.skip_iptest_but_not_pytest
@dec.skip_win32
@pytest.mark.skipif(
    sys.platform == "win32", reason="This test does not run under Windows"
)
def test_script_out(event_loop):
    assert event_loop.is_running() is False

    ip = get_ipython()
    ip.run_cell_magic("script", "--out output sh", "echo 'hi'")
    assert event_loop.is_running() is False
    assert ip.user_ns["output"] == "hi\n"


@dec.skip_iptest_but_not_pytest
@dec.skip_win32
@pytest.mark.skipif(
    sys.platform == "win32", reason="This test does not run under Windows"
)
def test_script_err(event_loop):
    ip = get_ipython()
    assert event_loop.is_running() is False
    ip.run_cell_magic("script", "--err error sh", "echo 'hello' >&2")
    assert event_loop.is_running() is False
    assert ip.user_ns["error"] == "hello\n"


@dec.skip_iptest_but_not_pytest
@dec.skip_win32
@pytest.mark.skipif(
    sys.platform == "win32", reason="This test does not run under Windows"
)
def test_script_out_err():

    ip = get_ipython()
    ip.run_cell_magic(
        "script", "--out output --err error sh", "echo 'hi'\necho 'hello' >&2"
    )
    assert ip.user_ns["output"] == "hi\n"
    assert ip.user_ns["error"] == "hello\n"


@dec.skip_iptest_but_not_pytest
@dec.skip_win32
@pytest.mark.skipif(
    sys.platform == "win32", reason="This test does not run under Windows"
)
async def test_script_bg_out(event_loop):
    ip = get_ipython()
    ip.run_cell_magic("script", "--bg --out output sh", "echo 'hi'")
    assert (await ip.user_ns["output"].read()) == b"hi\n"
    ip.user_ns["output"].close()
    event_loop.stop()


@dec.skip_iptest_but_not_pytest
@dec.skip_win32
@pytest.mark.skipif(
    sys.platform == "win32", reason="This test does not run under Windows"
)
async def test_script_bg_err():
    ip = get_ipython()
    ip.run_cell_magic("script", "--bg --err error sh", "echo 'hello' >&2")
    assert (await ip.user_ns["error"].read()) == b"hello\n"
    ip.user_ns["error"].close()


@dec.skip_iptest_but_not_pytest
@dec.skip_win32
@pytest.mark.skipif(
    sys.platform == "win32", reason="This test does not run under Windows"
)
async def test_script_bg_out_err():
    ip = get_ipython()
    ip.run_cell_magic(
        "script", "--bg --out output --err error sh", "echo 'hi'\necho 'hello' >&2"
    )
    assert (await ip.user_ns["output"].read()) == b"hi\n"
    assert (await ip.user_ns["error"].read()) == b"hello\n"
    ip.user_ns["output"].close()
    ip.user_ns["error"].close()


def test_script_defaults():
    ip = get_ipython()
    for cmd in ['sh', 'bash', 'perl', 'ruby']:
        try:
            find_cmd(cmd)
        except Exception:
            pass
        else:
            assert cmd in ip.magics_manager.magics["cell"]


@magics_class
class FooFoo(Magics):
    """class with both %foo and %%foo magics"""
    @line_magic('foo')
    def line_foo(self, line):
        "I am line foo"
        pass

    @cell_magic("foo")
    def cell_foo(self, line, cell):
        "I am cell foo, not line foo"
        pass

def test_line_cell_info():
    """%%foo and %foo magics are distinguishable to inspect"""
    ip = get_ipython()
    ip.magics_manager.register(FooFoo)
    oinfo = ip.object_inspect("foo")
    assert oinfo["found"] is True
    assert oinfo["ismagic"] is True

    oinfo = ip.object_inspect("%%foo")
    assert oinfo["found"] is True
    assert oinfo["ismagic"] is True
    assert oinfo["docstring"] == FooFoo.cell_foo.__doc__

    oinfo = ip.object_inspect("%foo")
    assert oinfo["found"] is True
    assert oinfo["ismagic"] is True
    assert oinfo["docstring"] == FooFoo.line_foo.__doc__


def test_multiple_magics():
    ip = get_ipython()
    foo1 = FooFoo(ip)
    foo2 = FooFoo(ip)
    mm = ip.magics_manager
    mm.register(foo1)
    assert mm.magics["line"]["foo"].__self__ is foo1
    mm.register(foo2)
    assert mm.magics["line"]["foo"].__self__ is foo2


def test_alias_magic():
    """Test %alias_magic."""
    ip = get_ipython()
    mm = ip.magics_manager

    # Basic operation: both cell and line magics are created, if possible.
    ip.run_line_magic("alias_magic", "timeit_alias timeit")
    assert "timeit_alias" in mm.magics["line"]
    assert "timeit_alias" in mm.magics["cell"]

    # --cell is specified, line magic not created.
    ip.run_line_magic("alias_magic", "--cell timeit_cell_alias timeit")
    assert "timeit_cell_alias" not in mm.magics["line"]
    assert "timeit_cell_alias" in mm.magics["cell"]

    # Test that line alias is created successfully.
    ip.run_line_magic("alias_magic", "--line env_alias env")
    assert ip.run_line_magic("env", "") == ip.run_line_magic("env_alias", "")

    # Test that line alias with parameters passed in is created successfully.
    ip.run_line_magic(
        "alias_magic", "--line history_alias history --params " + shlex.quote("3")
    )
    assert "history_alias" in mm.magics["line"]


def test_save():
    """Test %save."""
    ip = get_ipython()
    ip.history_manager.reset()   # Clear any existing history.
    cmds = ["a=1", "def b():\n  return a**2", "print(a, b())"]
    for i, cmd in enumerate(cmds, start=1):
        ip.history_manager.store_inputs(i, cmd)
    with TemporaryDirectory() as tmpdir:
        file = os.path.join(tmpdir, "testsave.py")
        ip.run_line_magic("save", "%s 1-10" % file)
        content = Path(file).read_text()
        assert content.count(cmds[0]) == 1
        assert "coding: utf-8" in content
        ip.run_line_magic("save", "-a %s 1-10" % file)
        content = Path(file).read_text()
        assert content.count(cmds[0]) == 2
        assert "coding: utf-8" in content


def test_save_with_no_args():
    ip = get_ipython()
    ip.history_manager.reset()  # Clear any existing history.
    cmds = ["a=1", "def b():\n    return a**2", "print(a, b())", "%save"]
    for i, cmd in enumerate(cmds, start=1):
        ip.history_manager.store_inputs(i, cmd)

    with TemporaryDirectory() as tmpdir:
        path = os.path.join(tmpdir, "testsave.py")
        ip.run_line_magic("save", path)
        content = Path(path).read_text()
        expected_content = dedent(
            """\
            # coding: utf-8
            a=1
            def b():
                return a**2
            print(a, b())
            """
        )
        assert content == expected_content


def test_store():
    """Test %store."""
    ip = get_ipython()
    ip.run_line_magic('load_ext', 'storemagic')

    # make sure the storage is empty
    ip.run_line_magic("store", "-z")
    ip.user_ns["var"] = 42
    ip.run_line_magic("store", "var")
    ip.user_ns["var"] = 39
    ip.run_line_magic("store", "-r")
    assert ip.user_ns["var"] == 42

    ip.run_line_magic("store", "-d var")
    ip.user_ns["var"] = 39
    ip.run_line_magic("store", "-r")
    assert ip.user_ns["var"] == 39


def _run_edit_test(arg_s, exp_filename=None,
                        exp_lineno=-1,
                        exp_contents=None,
                        exp_is_temp=None):
    ip = get_ipython()
    M = code.CodeMagics(ip)
    last_call = ['','']
    opts,args = M.parse_options(arg_s,'prxn:')
    filename, lineno, is_temp = M._find_edit_target(ip, args, opts, last_call)

    if exp_filename is not None:
        assert exp_filename == filename
    if exp_contents is not None:
        with io.open(filename, 'r', encoding='utf-8') as f:
            contents = f.read()
        assert exp_contents == contents
    if exp_lineno != -1:
        assert exp_lineno == lineno
    if exp_is_temp is not None:
        assert exp_is_temp == is_temp


def test_edit_interactive():
    """%edit on interactively defined objects"""
    ip = get_ipython()
    n = ip.execution_count
    ip.run_cell("def foo(): return 1", store_history=True)

    with pytest.raises(code.InteractivelyDefined) as e:
        _run_edit_test("foo")
    assert e.value.index == n


def test_edit_cell():
    """%edit [cell id]"""
    ip = get_ipython()

    ip.run_cell("def foo(): return 1", store_history=True)

    # test
    _run_edit_test("1", exp_contents=ip.user_ns['In'][1], exp_is_temp=True)

def test_edit_fname():
    """%edit file"""
    # test
    _run_edit_test("test file.py", exp_filename="test file.py")

def test_bookmark():
    ip = get_ipython()
    ip.run_line_magic('bookmark', 'bmname')
    with tt.AssertPrints('bmname'):
        ip.run_line_magic('bookmark', '-l')
    ip.run_line_magic('bookmark', '-d bmname')

def test_ls_magic():
    ip = get_ipython()
    json_formatter = ip.display_formatter.formatters['application/json']
    json_formatter.enabled = True
    lsmagic = ip.magic('lsmagic')
    with warnings.catch_warnings(record=True) as w:
        j = json_formatter(lsmagic)
    assert sorted(j) == ["cell", "line"]
    assert w == []  # no warnings


def test_strip_initial_indent():
    def sii(s):
        lines = s.splitlines()
        return '\n'.join(code.strip_initial_indent(lines))

    assert sii("  a = 1\nb = 2") == "a = 1\nb = 2"
    assert sii("  a\n    b\nc") == "a\n  b\nc"
    assert sii("a\n  b") == "a\n  b"

def test_logging_magic_quiet_from_arg():
    _ip.config.LoggingMagics.quiet = False
    lm = logging.LoggingMagics(shell=_ip)
    with TemporaryDirectory() as td:
        try:
            with tt.AssertNotPrints(re.compile("Activating.*")):
                lm.logstart('-q {}'.format(
                        os.path.join(td, "quiet_from_arg.log")))
        finally:
            _ip.logger.logstop()

def test_logging_magic_quiet_from_config():
    _ip.config.LoggingMagics.quiet = True
    lm = logging.LoggingMagics(shell=_ip)
    with TemporaryDirectory() as td:
        try:
            with tt.AssertNotPrints(re.compile("Activating.*")):
                lm.logstart(os.path.join(td, "quiet_from_config.log"))
        finally:
            _ip.logger.logstop()


def test_logging_magic_not_quiet():
    _ip.config.LoggingMagics.quiet = False
    lm = logging.LoggingMagics(shell=_ip)
    with TemporaryDirectory() as td:
        try:
            with tt.AssertPrints(re.compile("Activating.*")):
                lm.logstart(os.path.join(td, "not_quiet.log"))
        finally:
            _ip.logger.logstop()


def test_time_no_var_expand():
    _ip.user_ns['a'] = 5
    _ip.user_ns['b'] = []
    _ip.magic('time b.append("{a}")')
    assert _ip.user_ns['b'] == ['{a}']


# this is slow, put at the end for local testing.
def test_timeit_arguments():
    "Test valid timeit arguments, should not cause SyntaxError (GH #1269)"
    if sys.version_info < (3,7):
        _ip.magic("timeit -n1 -r1 ('#')")
    else:
        # 3.7 optimize no-op statement like above out, and complain there is
        # nothing in the for loop.
        _ip.magic("timeit -n1 -r1 a=('#')")


TEST_MODULE = """
print('Loaded my_tmp')
if __name__ == "__main__":
    print('I just ran a script')
"""


def test_run_module_from_import_hook():
    "Test that a module can be loaded via an import hook"
    with TemporaryDirectory() as tmpdir:
        fullpath = os.path.join(tmpdir, 'my_tmp.py')
        Path(fullpath).write_text(TEST_MODULE)

        import importlib.abc
        import importlib.util

        class MyTempImporter(importlib.abc.MetaPathFinder, importlib.abc.SourceLoader):
            def find_spec(self, fullname, path, target=None):
                if fullname == "my_tmp":
                    return importlib.util.spec_from_loader(fullname, self)

            def get_filename(self, fullname):
                if fullname != "my_tmp":
                    raise ImportError(f"unexpected module name '{fullname}'")
                return fullpath

            def get_data(self, path):
                if not Path(path).samefile(fullpath):
                    raise OSError(f"expected path '{fullpath}', got '{path}'")
                return Path(fullpath).read_text()

        sys.meta_path.insert(0, MyTempImporter())

        with capture_output() as captured:
            _ip.magic("run -m my_tmp")
            _ip.run_cell("import my_tmp")

        output = "Loaded my_tmp\nI just ran a script\nLoaded my_tmp\n"
        assert output == captured.stdout

        sys.meta_path.pop(0)