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#!/usr/bin/env python3

# Copyright (c) 2009, Giampaolo Rodola'. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Contracts tests. These tests mainly check API sanity in terms of
returned types and APIs availability.
Some of these are duplicates of tests test_system.py and test_process.py.
"""

import signal

import psutil
from psutil import AIX
from psutil import FREEBSD
from psutil import LINUX
from psutil import MACOS
from psutil import NETBSD
from psutil import OPENBSD
from psutil import POSIX
from psutil import SUNOS
from psutil import WINDOWS
from psutil.tests import AARCH64
from psutil.tests import GITHUB_ACTIONS
from psutil.tests import HAS_CPU_FREQ
from psutil.tests import HAS_NET_IO_COUNTERS
from psutil.tests import HAS_SENSORS_FANS
from psutil.tests import HAS_SENSORS_TEMPERATURES
from psutil.tests import SKIP_SYSCONS
from psutil.tests import PsutilTestCase
from psutil.tests import create_sockets
from psutil.tests import enum
from psutil.tests import is_namedtuple
from psutil.tests import kernel_version
from psutil.tests import pytest

# ===================================================================
# --- APIs availability
# ===================================================================

# Make sure code reflects what doc promises in terms of APIs
# availability.


class TestAvailConstantsAPIs(PsutilTestCase):
    def test_PROCFS_PATH(self):
        assert hasattr(psutil, "PROCFS_PATH") == (LINUX or SUNOS or AIX)

    def test_win_priority(self):
        assert hasattr(psutil, "ABOVE_NORMAL_PRIORITY_CLASS") == WINDOWS
        assert hasattr(psutil, "BELOW_NORMAL_PRIORITY_CLASS") == WINDOWS
        assert hasattr(psutil, "HIGH_PRIORITY_CLASS") == WINDOWS
        assert hasattr(psutil, "IDLE_PRIORITY_CLASS") == WINDOWS
        assert hasattr(psutil, "NORMAL_PRIORITY_CLASS") == WINDOWS
        assert hasattr(psutil, "REALTIME_PRIORITY_CLASS") == WINDOWS

    def test_linux_ioprio_linux(self):
        assert hasattr(psutil, "IOPRIO_CLASS_NONE") == LINUX
        assert hasattr(psutil, "IOPRIO_CLASS_RT") == LINUX
        assert hasattr(psutil, "IOPRIO_CLASS_BE") == LINUX
        assert hasattr(psutil, "IOPRIO_CLASS_IDLE") == LINUX

    def test_linux_ioprio_windows(self):
        assert hasattr(psutil, "IOPRIO_HIGH") == WINDOWS
        assert hasattr(psutil, "IOPRIO_NORMAL") == WINDOWS
        assert hasattr(psutil, "IOPRIO_LOW") == WINDOWS
        assert hasattr(psutil, "IOPRIO_VERYLOW") == WINDOWS

    @pytest.mark.skipif(
        GITHUB_ACTIONS and LINUX,
        reason="unsupported on GITHUB_ACTIONS + LINUX",
    )
    def test_rlimit(self):
        assert hasattr(psutil, "RLIM_INFINITY") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_AS") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_CORE") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_CPU") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_DATA") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_FSIZE") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_MEMLOCK") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_NOFILE") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_NPROC") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_RSS") == LINUX or FREEBSD
        assert hasattr(psutil, "RLIMIT_STACK") == LINUX or FREEBSD

        assert hasattr(psutil, "RLIMIT_LOCKS") == LINUX
        if POSIX:
            if kernel_version() >= (2, 6, 8):
                assert hasattr(psutil, "RLIMIT_MSGQUEUE") == LINUX
            if kernel_version() >= (2, 6, 12):
                assert hasattr(psutil, "RLIMIT_NICE") == LINUX
            if kernel_version() >= (2, 6, 12):
                assert hasattr(psutil, "RLIMIT_RTPRIO") == LINUX
            if kernel_version() >= (2, 6, 25):
                assert hasattr(psutil, "RLIMIT_RTTIME") == LINUX
            if kernel_version() >= (2, 6, 8):
                assert hasattr(psutil, "RLIMIT_SIGPENDING") == LINUX

        assert hasattr(psutil, "RLIMIT_SWAP") == FREEBSD
        assert hasattr(psutil, "RLIMIT_SBSIZE") == FREEBSD
        assert hasattr(psutil, "RLIMIT_NPTS") == FREEBSD


class TestAvailSystemAPIs(PsutilTestCase):
    def test_win_service_iter(self):
        assert hasattr(psutil, "win_service_iter") == WINDOWS

    def test_win_service_get(self):
        assert hasattr(psutil, "win_service_get") == WINDOWS

    @pytest.mark.skipif(MACOS and AARCH64, reason="skipped due to #1892")
    def test_cpu_freq(self):
        assert hasattr(psutil, "cpu_freq") == (
            LINUX or MACOS or WINDOWS or FREEBSD or OPENBSD
        )

    def test_sensors_temperatures(self):
        assert hasattr(psutil, "sensors_temperatures") == (LINUX or FREEBSD)

    def test_sensors_fans(self):
        assert hasattr(psutil, "sensors_fans") == LINUX

    def test_battery(self):
        assert hasattr(psutil, "sensors_battery") == (
            LINUX or WINDOWS or FREEBSD or MACOS
        )


class TestAvailProcessAPIs(PsutilTestCase):
    def test_environ(self):
        assert hasattr(psutil.Process, "environ") == (
            LINUX
            or MACOS
            or WINDOWS
            or AIX
            or SUNOS
            or FREEBSD
            or OPENBSD
            or NETBSD
        )

    def test_uids(self):
        assert hasattr(psutil.Process, "uids") == POSIX

    def test_gids(self):
        assert hasattr(psutil.Process, "uids") == POSIX

    def test_terminal(self):
        assert hasattr(psutil.Process, "terminal") == POSIX

    def test_ionice(self):
        assert hasattr(psutil.Process, "ionice") == (LINUX or WINDOWS)

    @pytest.mark.skipif(
        GITHUB_ACTIONS and LINUX,
        reason="unsupported on GITHUB_ACTIONS + LINUX",
    )
    def test_rlimit(self):
        assert hasattr(psutil.Process, "rlimit") == (LINUX or FREEBSD)

    def test_io_counters(self):
        hasit = hasattr(psutil.Process, "io_counters")
        assert hasit == (not (MACOS or SUNOS))

    def test_num_fds(self):
        assert hasattr(psutil.Process, "num_fds") == POSIX

    def test_num_handles(self):
        assert hasattr(psutil.Process, "num_handles") == WINDOWS

    def test_cpu_affinity(self):
        assert hasattr(psutil.Process, "cpu_affinity") == (
            LINUX or WINDOWS or FREEBSD
        )

    def test_cpu_num(self):
        assert hasattr(psutil.Process, "cpu_num") == (
            LINUX or FREEBSD or SUNOS
        )

    def test_memory_maps(self):
        hasit = hasattr(psutil.Process, "memory_maps")
        assert hasit == (not (OPENBSD or NETBSD or AIX or MACOS))


# ===================================================================
# --- API types
# ===================================================================


class TestSystemAPITypes(PsutilTestCase):
    """Check the return types of system related APIs.
    https://github.com/giampaolo/psutil/issues/1039.
    """

    @classmethod
    def setUpClass(cls):
        cls.proc = psutil.Process()

    def assert_ntuple_of_nums(self, nt, type_=float, gezero=True):
        assert is_namedtuple(nt)
        for n in nt:
            assert isinstance(n, type_)
            if gezero:
                assert n >= 0

    def test_cpu_times(self):
        self.assert_ntuple_of_nums(psutil.cpu_times())
        for nt in psutil.cpu_times(percpu=True):
            self.assert_ntuple_of_nums(nt)

    def test_cpu_percent(self):
        assert isinstance(psutil.cpu_percent(interval=None), float)
        assert isinstance(psutil.cpu_percent(interval=0.00001), float)

    def test_cpu_times_percent(self):
        self.assert_ntuple_of_nums(psutil.cpu_times_percent(interval=None))
        self.assert_ntuple_of_nums(psutil.cpu_times_percent(interval=0.0001))

    def test_cpu_count(self):
        assert isinstance(psutil.cpu_count(), int)

    # TODO: remove this once 1892 is fixed
    @pytest.mark.skipif(MACOS and AARCH64, reason="skipped due to #1892")
    @pytest.mark.skipif(not HAS_CPU_FREQ, reason="not supported")
    def test_cpu_freq(self):
        if psutil.cpu_freq() is None:
            raise pytest.skip("cpu_freq() returns None")
        self.assert_ntuple_of_nums(psutil.cpu_freq(), type_=(float, int))

    def test_disk_io_counters(self):
        # Duplicate of test_system.py. Keep it anyway.
        for k, v in psutil.disk_io_counters(perdisk=True).items():
            assert isinstance(k, str)
            self.assert_ntuple_of_nums(v, type_=int)

    def test_disk_partitions(self):
        # Duplicate of test_system.py. Keep it anyway.
        for disk in psutil.disk_partitions():
            assert isinstance(disk.device, str)
            assert isinstance(disk.mountpoint, str)
            assert isinstance(disk.fstype, str)
            assert isinstance(disk.opts, str)

    @pytest.mark.skipif(SKIP_SYSCONS, reason="requires root")
    def test_net_connections(self):
        with create_sockets():
            ret = psutil.net_connections('all')
            assert len(ret) == len(set(ret))
            for conn in ret:
                assert is_namedtuple(conn)

    def test_net_if_addrs(self):
        # Duplicate of test_system.py. Keep it anyway.
        for ifname, addrs in psutil.net_if_addrs().items():
            assert isinstance(ifname, str)
            for addr in addrs:
                assert isinstance(addr.family, enum.IntEnum)
                assert isinstance(addr.address, str)
                assert isinstance(addr.netmask, (str, type(None)))
                assert isinstance(addr.broadcast, (str, type(None)))

    def test_net_if_stats(self):
        # Duplicate of test_system.py. Keep it anyway.
        for ifname, info in psutil.net_if_stats().items():
            assert isinstance(ifname, str)
            assert isinstance(info.isup, bool)
            assert isinstance(info.duplex, enum.IntEnum)
            assert isinstance(info.speed, int)
            assert isinstance(info.mtu, int)

    @pytest.mark.skipif(not HAS_NET_IO_COUNTERS, reason="not supported")
    def test_net_io_counters(self):
        # Duplicate of test_system.py. Keep it anyway.
        for ifname in psutil.net_io_counters(pernic=True):
            assert isinstance(ifname, str)

    @pytest.mark.skipif(not HAS_SENSORS_FANS, reason="not supported")
    def test_sensors_fans(self):
        # Duplicate of test_system.py. Keep it anyway.
        for name, units in psutil.sensors_fans().items():
            assert isinstance(name, str)
            for unit in units:
                assert isinstance(unit.label, str)
                assert isinstance(unit.current, (float, int, type(None)))

    @pytest.mark.skipif(not HAS_SENSORS_TEMPERATURES, reason="not supported")
    def test_sensors_temperatures(self):
        # Duplicate of test_system.py. Keep it anyway.
        for name, units in psutil.sensors_temperatures().items():
            assert isinstance(name, str)
            for unit in units:
                assert isinstance(unit.label, str)
                assert isinstance(unit.current, (float, int, type(None)))
                assert isinstance(unit.high, (float, int, type(None)))
                assert isinstance(unit.critical, (float, int, type(None)))

    def test_boot_time(self):
        # Duplicate of test_system.py. Keep it anyway.
        assert isinstance(psutil.boot_time(), float)

    def test_users(self):
        # Duplicate of test_system.py. Keep it anyway.
        for user in psutil.users():
            assert isinstance(user.name, str)
            assert isinstance(user.terminal, (str, type(None)))
            assert isinstance(user.host, (str, type(None)))
            assert isinstance(user.pid, (int, type(None)))
            if isinstance(user.pid, int):
                assert user.pid > 0


class TestProcessWaitType(PsutilTestCase):
    @pytest.mark.skipif(not POSIX, reason="not POSIX")
    def test_negative_signal(self):
        p = psutil.Process(self.spawn_subproc().pid)
        p.terminate()
        code = p.wait()
        assert code == -signal.SIGTERM
        assert isinstance(code, enum.IntEnum)
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