moved tests to testenv

19 files changed, 1520 insertions, 5 deletions

diff --git a/testenv/tests/__init__.py b/testenv/tests/__init__.py
new file mode 100644
index 00000000..d1faace6
--- /dev/null
+++ b/testenv/tests/__init__.py
@@ -0,0 +1,59 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import sys
+
+from typing import Dict
+from typing import Optional
+
+import fake_rpi.RPi
+
+
+# =====
+class _GPIO(fake_rpi.RPi._GPIO):  # pylint: disable=protected-access
+    def __init__(self) -> None:
+        super().__init__()
+        self.__states: Dict[int, int] = {}
+
+    @fake_rpi.RPi.printf
+    def setup(self, channel: int, state: int, initial: int=0, pull_up_down: Optional[int]=None) -> None:
+        _ = state  # Makes linter happy
+        _ = pull_up_down  # Makes linter happy
+        self.__states[int(channel)] = int(initial)
+
+    @fake_rpi.RPi.printf
+    def output(self, channel: int, state: int) -> None:
+        self.__states[int(channel)] = int(state)
+
+    @fake_rpi.RPi.printf
+    def input(self, channel: int) -> int:  # pylint: disable=arguments-differ
+        return self.__states[int(channel)]
+
+    @fake_rpi.RPi.printf
+    def cleanup(self, channel: Optional[int]=None) -> None:  # pylint: disable=arguments-differ
+        _ = channel  # Makes linter happy
+        self.__states = {}
+
+
+# =====
+fake_rpi.RPi.GPIO = _GPIO()
+sys.modules["RPi"] = fake_rpi.RPi
diff --git a/testenv/tests/apps/__init__.py b/testenv/tests/apps/__init__.py
new file mode 100644
index 00000000..1e91f7fa
--- /dev/null
+++ b/testenv/tests/apps/__init__.py
@@ -0,0 +1,20 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
diff --git a/testenv/tests/apps/test_cleanup.py b/testenv/tests/apps/test_cleanup.py
new file mode 100644
index 00000000..3e2e4c72
--- /dev/null
+++ b/testenv/tests/apps/test_cleanup.py
@@ -0,0 +1,71 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import os
+import secrets
+import multiprocessing
+import multiprocessing.queues
+import time
+
+import setproctitle
+
+from kvmd.apps.cleanup import main
+
+
+# =====
+def test_ok(tmpdir) -> None:  # type: ignore
+    queue: multiprocessing.queues.Queue = multiprocessing.Queue()
+
+    ustreamer_tmp_path = os.path.abspath(str(tmpdir.join("ustr-" + secrets.token_hex(3))))
+    os.symlink("/usr/bin/ustreamer", ustreamer_tmp_path)
+
+    ustreamer_sock_path = os.path.abspath(str(tmpdir.join("ustreamer-fake.sock")))
+    open(ustreamer_sock_path, "w").close()
+    kvmd_sock_path = os.path.abspath(str(tmpdir.join("kvmd-fake.sock")))
+    open(kvmd_sock_path, "w").close()
+
+    def ustreamer_fake() -> None:
+        setproctitle.setproctitle(os.path.basename(ustreamer_tmp_path))
+        queue.put(True)
+        while True:
+            time.sleep(1)
+
+    proc = multiprocessing.Process(target=ustreamer_fake, daemon=True)
+    proc.start()
+    assert queue.get(timeout=5)
+
+    assert proc.is_alive()
+    main([
+        "kvmd-cleanup",
+        "--set-options",
+        "kvmd/server/port=0",
+        "kvmd/server/unix=" + kvmd_sock_path,
+        "kvmd/streamer/port=0",
+        "kvmd/streamer/unix=" + ustreamer_sock_path,
+        "kvmd/streamer/cmd=" + ustreamer_tmp_path,
+    ])
+
+    assert not os.path.exists(ustreamer_sock_path)
+    assert not os.path.exists(kvmd_sock_path)
+
+    assert not proc.is_alive()
+    proc.join()
diff --git a/testenv/tests/apps/test_htpasswd.py b/testenv/tests/apps/test_htpasswd.py
new file mode 100644
index 00000000..52a38640
--- /dev/null
+++ b/testenv/tests/apps/test_htpasswd.py
@@ -0,0 +1,170 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import os
+import hashlib
+import tempfile
+import builtins
+import getpass
+
+from typing import List
+from typing import Generator
+from typing import Any
+
+import passlib.apache
+
+import pytest
+
+from kvmd.apps.htpasswd import main
+
+
+# =====
+def _make_passwd(user: str) -> str:
+    return hashlib.md5(user.encode()).hexdigest()
+
+
[email protected](name="htpasswd", params=[[], ["admin"], ["admin", "user"]])
+def _htpasswd_fixture(request) -> Generator[passlib.apache.HtpasswdFile, None, None]:  # type: ignore
+    (fd, path) = tempfile.mkstemp()
+    os.close(fd)
+    htpasswd = passlib.apache.HtpasswdFile(path)
+    for user in request.param:
+        htpasswd.set_password(user, _make_passwd(user))
+    htpasswd.save()
+    yield htpasswd
+    os.remove(path)
+
+
+def _run_htpasswd(cmd: List[str], htpasswd_path: str, internal_type: str="htpasswd") -> None:
+    cmd = ["kvmd-htpasswd", *cmd, "--set-options"]
+    if internal_type != "htpasswd":  # By default
+        cmd.append("kvmd/auth/internal_type=" + internal_type)
+    if htpasswd_path:
+        cmd.append("kvmd/auth/internal/file=" + htpasswd_path)
+    main(cmd)
+
+
+# =====
+def test_ok__list(htpasswd: passlib.apache.HtpasswdFile, capsys) -> None:  # type: ignore
+    _run_htpasswd(["list"], htpasswd.path)
+    (out, err) = capsys.readouterr()
+    assert len(err) == 0
+    assert sorted(filter(None, out.split("\n"))) == sorted(htpasswd.users()) == sorted(set(htpasswd.users()))
+
+
+# =====
+def test_ok__set_change_stdin(htpasswd: passlib.apache.HtpasswdFile, mocker) -> None:  # type: ignore
+    old_users = set(htpasswd.users())
+    if old_users:
+        assert htpasswd.check_password("admin", _make_passwd("admin"))
+
+        mocker.patch.object(builtins, "input", (lambda: " test "))
+        _run_htpasswd(["set", "admin", "--read-stdin"], htpasswd.path)
+
+        htpasswd.load(force=True)
+        assert htpasswd.check_password("admin", " test ")
+        assert old_users == set(htpasswd.users())
+
+
+def test_ok__set_add_stdin(htpasswd: passlib.apache.HtpasswdFile, mocker) -> None:  # type: ignore
+    old_users = set(htpasswd.users())
+    if old_users:
+        mocker.patch.object(builtins, "input", (lambda: " test "))
+        _run_htpasswd(["set", "new", "--read-stdin"], htpasswd.path)
+
+        htpasswd.load(force=True)
+        assert htpasswd.check_password("new", " test ")
+        assert old_users.union(["new"]) == set(htpasswd.users())
+
+
+# =====
+def test_ok__set_change_getpass(htpasswd: passlib.apache.HtpasswdFile, mocker) -> None:  # type: ignore
+    old_users = set(htpasswd.users())
+    if old_users:
+        assert htpasswd.check_password("admin", _make_passwd("admin"))
+
+        mocker.patch.object(getpass, "getpass", (lambda *_, **__: " test "))
+        _run_htpasswd(["set", "admin"], htpasswd.path)
+
+        htpasswd.load(force=True)
+        assert htpasswd.check_password("admin", " test ")
+        assert old_users == set(htpasswd.users())
+
+
+def test_fail__set_change_getpass(htpasswd: passlib.apache.HtpasswdFile, mocker) -> None:  # type: ignore
+    old_users = set(htpasswd.users())
+    if old_users:
+        assert htpasswd.check_password("admin", _make_passwd("admin"))
+
+        count = 0
+
+        def fake_getpass(*_: Any, **__: Any) -> str:
+            nonlocal count
+            assert count <= 1
+            if count == 0:
+                passwd = " test "
+            else:
+                passwd = "test "
+            count += 1
+            return passwd
+
+        mocker.patch.object(getpass, "getpass", fake_getpass)
+        with pytest.raises(SystemExit, match="Sorry, passwords do not match"):
+            _run_htpasswd(["set", "admin"], htpasswd.path)
+        assert count == 2
+
+        htpasswd.load(force=True)
+        assert htpasswd.check_password("admin", _make_passwd("admin"))
+        assert old_users == set(htpasswd.users())
+
+
+# =====
+def test_ok__del(htpasswd: passlib.apache.HtpasswdFile) -> None:
+    old_users = set(htpasswd.users())
+
+    if old_users:
+        assert htpasswd.check_password("admin", _make_passwd("admin"))
+
+    _run_htpasswd(["del", "admin"], htpasswd.path)
+
+    htpasswd.load(force=True)
+    assert not htpasswd.check_password("admin", _make_passwd("admin"))
+    assert old_users.difference(["admin"]) == set(htpasswd.users())
+
+
+# =====
+def test_fail__not_htpasswd() -> None:
+    with pytest.raises(SystemExit, match="Error: KVMD internal auth not using 'htpasswd'"):
+        _run_htpasswd(["list"], "", internal_type="http")
+
+
+def test_fail__unknown_plugin() -> None:
+    with pytest.raises(SystemExit, match="Config error: Unknown plugin 'auth/foobar'"):
+        _run_htpasswd(["list"], "", internal_type="foobar")
+
+
+def test_fail__invalid_passwd(mocker, tmpdir) -> None:  # type: ignore
+    path = os.path.abspath(str(tmpdir.join("htpasswd")))
+    open(path, "w").close()
+    mocker.patch.object(builtins, "input", (lambda: "\n"))
+    with pytest.raises(SystemExit, match="The argument is not a valid passwd characters"):
+        _run_htpasswd(["set", "admin", "--read-stdin"], path)
diff --git a/testenv/tests/auth/__init__.py b/testenv/tests/auth/__init__.py
new file mode 100644
index 00000000..cdaa6cfb
--- /dev/null
+++ b/testenv/tests/auth/__init__.py
@@ -0,0 +1,43 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import contextlib
+
+from typing import AsyncGenerator
+from typing import Any
+
+from kvmd.yamlconf import make_config
+
+from kvmd.plugins.auth import BaseAuthService
+from kvmd.plugins.auth import get_auth_service_class
+
+
+# =====
[email protected]
+async def get_configured_auth_service(name: str, **kwargs: Any) -> AsyncGenerator[BaseAuthService, None]:
+    service_class = get_auth_service_class(name)
+    config = make_config(kwargs, service_class.get_options())
+    service = service_class(**config._unpack())  # pylint: disable=protected-access
+    try:
+        yield service
+    finally:
+        await service.cleanup()
diff --git a/testenv/tests/auth/test_service_htpasswd.py b/testenv/tests/auth/test_service_htpasswd.py
new file mode 100644
index 00000000..6378d896
--- /dev/null
+++ b/testenv/tests/auth/test_service_htpasswd.py
@@ -0,0 +1,54 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import os
+
+import passlib.apache
+
+import pytest
+
+from . import get_configured_auth_service
+
+
+# =====
[email protected]
+async def test_ok__htpasswd_service(tmpdir) -> None:  # type: ignore
+    path = os.path.abspath(str(tmpdir.join("htpasswd")))
+
+    htpasswd = passlib.apache.HtpasswdFile(path, new=True)
+    htpasswd.set_password("admin", "pass")
+    htpasswd.save()
+
+    async with get_configured_auth_service("htpasswd", file=path) as service:
+        assert not (await service.login("user", "foo"))
+        assert not (await service.login("admin", "foo"))
+        assert not (await service.login("user", "pass"))
+        assert (await service.login("admin", "pass"))
+
+        htpasswd.set_password("admin", "bar")
+        htpasswd.set_password("user", "bar")
+        htpasswd.save()
+
+        assert (await service.login("admin", "bar"))
+        assert (await service.login("user", "bar"))
+        assert not (await service.login("admin", "foo"))
+        assert not (await service.login("user", "foo"))
diff --git a/testenv/tests/auth/test_service_http.py b/testenv/tests/auth/test_service_http.py
new file mode 100644
index 00000000..c6f2b631
--- /dev/null
+++ b/testenv/tests/auth/test_service_http.py
@@ -0,0 +1,79 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+from typing import Dict
+from typing import AsyncGenerator
+
+import aiohttp.web
+import aiohttp_basicauth
+
+import pytest
+
+from . import get_configured_auth_service
+
+
+# =====
+async def _handle_auth(request: aiohttp.web.BaseRequest) -> aiohttp.web.Response:
+    status = 400
+    if request.method == "POST":
+        credentials = (await request.json())
+        if credentials["user"] == "admin" and credentials["passwd"] == "pass":
+            status = 200
+    return aiohttp.web.Response(text=str(status), status=status)
+
+
[email protected](name="auth_server_port")
+async def _auth_server_port_fixture(aiohttp_server) -> AsyncGenerator[int, None]:  # type: ignore
+    auth = aiohttp_basicauth.BasicAuthMiddleware(
+        username="server-admin",
+        password="server-pass",
+        force=False,
+    )
+
+    app = aiohttp.web.Application(middlewares=[auth])
+    app.router.add_post("/auth", _handle_auth)
+    app.router.add_post("/auth_plus_basic", auth.required(_handle_auth))
+
+    server = await aiohttp_server(app)
+    try:
+        yield server.port
+    finally:
+        await server.close()
+
+
+# =====
[email protected]
[email protected]("kwargs", [
+    {},
+    {"verify": False},
+    {"user": "server-admin", "passwd": "server-pass"},
+])
+async def test_ok(auth_server_port: int, kwargs: Dict) -> None:
+    url = "http://localhost:%d/%s" % (
+        auth_server_port,
+        ("auth_plus_basic" if kwargs.get("user") else "auth"),
+    )
+    async with get_configured_auth_service("http", url=url, **kwargs) as service:
+        assert not (await service.login("user", "foobar"))
+        assert not (await service.login("admin", "foobar"))
+        assert not (await service.login("user", "pass"))
+        assert (await service.login("admin", "pass"))
diff --git a/testenv/tests/test_aioregion.py b/testenv/tests/test_aioregion.py
new file mode 100644
index 00000000..601f5280
--- /dev/null
+++ b/testenv/tests/test_aioregion.py
@@ -0,0 +1,113 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import asyncio
+
+import pytest
+
+from kvmd.aioregion import RegionIsBusyError
+from kvmd.aioregion import AioExclusiveRegion
+
+
+# =====
[email protected]
+async def test_ok__access_one() -> None:
+    region = AioExclusiveRegion(RegionIsBusyError)
+
+    async def func() -> None:
+        assert not region.is_busy()
+        with region:
+            assert region.is_busy()
+        assert not region.is_busy()
+
+    await func()
+
+    assert not region.is_busy()
+    region.exit()
+    assert not region.is_busy()
+
+
[email protected]
+async def test_fail__access_one() -> None:
+    region = AioExclusiveRegion(RegionIsBusyError)
+
+    async def func() -> None:
+        assert not region.is_busy()
+        with region:
+            assert region.is_busy()
+            region.enter()
+        assert not region.is_busy()
+
+    with pytest.raises(RegionIsBusyError):
+        await func()
+
+    assert not region.is_busy()
+    region.exit()
+    assert not region.is_busy()
+
+
+# =====
[email protected]
+async def test_ok__access_two() -> None:
+    region = AioExclusiveRegion(RegionIsBusyError)
+
+    async def func1() -> None:
+        with region:
+            await asyncio.sleep(1)
+        print("done func1()")
+
+    async def func2() -> None:
+        await asyncio.sleep(2)
+        print("waiking up func2()")
+        with region:
+            await asyncio.sleep(1)
+        print("done func2()")
+
+    await asyncio.gather(func1(), func2())
+
+    assert not region.is_busy()
+    region.exit()
+    assert not region.is_busy()
+
+
[email protected]
+async def test_fail__access_two() -> None:
+    region = AioExclusiveRegion(RegionIsBusyError)
+
+    async def func1() -> None:
+        with region:
+            await asyncio.sleep(2)
+        print("done func1()")
+
+    async def func2() -> None:
+        await asyncio.sleep(1)
+        with region:
+            await asyncio.sleep(1)
+        print("done func2()")
+
+    results = await asyncio.gather(func1(), func2(), return_exceptions=True)
+    assert results[0] is None
+    assert type(results[1]) == RegionIsBusyError  # pylint: disable=unidiomatic-typecheck
+
+    assert not region.is_busy()
+    region.exit()
+    assert not region.is_busy()
diff --git a/testenv/tests/test_gpio.py b/testenv/tests/test_gpio.py
new file mode 100644
index 00000000..6a02816d
--- /dev/null
+++ b/testenv/tests/test_gpio.py
@@ -0,0 +1,58 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import pytest
+
+from kvmd import gpio
+
+
+# =====
[email protected]("pin", [0, 1, 13])
+def test_ok__loopback_initial_false(pin: int) -> None:
+    with gpio.bcm():
+        assert gpio.set_output(pin) == pin
+        assert gpio.read(pin) is False
+        gpio.write(pin, True)
+        assert gpio.read(pin) is True
+
+
[email protected]("pin", [0, 1, 13])
+def test_ok__loopback_initial_true(pin: int) -> None:
+    with gpio.bcm():
+        assert gpio.set_output(pin, True) == pin
+        assert gpio.read(pin) is True
+        gpio.write(pin, False)
+        assert gpio.read(pin) is False
+
+
[email protected]("pin", [0, 1, 13])
+def test_ok__input(pin: int) -> None:
+    with gpio.bcm():
+        assert gpio.set_input(pin) == pin
+        assert gpio.read(pin) is False
+
+
+def test_fail__invalid_pin() -> None:
+    with pytest.raises(AssertionError):
+        gpio.set_output(-1)
+    with pytest.raises(AssertionError):
+        gpio.set_input(-1)
diff --git a/testenv/tests/test_keymap.py b/testenv/tests/test_keymap.py
new file mode 100644
index 00000000..f69accb1
--- /dev/null
+++ b/testenv/tests/test_keymap.py
@@ -0,0 +1,36 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import pytest
+
+from kvmd.keymap import KEYMAP
+
+
+# =====
+def test_ok__keymap() -> None:
+    assert type(KEYMAP["KeyA"]) == int  # pylint: disable=unidiomatic-typecheck
+    assert KEYMAP["KeyA"] == 1
+
+
+def test_fail__keymap() -> None:
+    with pytest.raises(KeyError):
+        print(KEYMAP["keya"])
diff --git a/testenv/tests/test_logging.py b/testenv/tests/test_logging.py
new file mode 100644
index 00000000..e6372e33
--- /dev/null
+++ b/testenv/tests/test_logging.py
@@ -0,0 +1,35 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import pytest
+
+from kvmd.logging import get_logger
+
+
+# =====
[email protected]("depth, name", [
+    (0, "tests.test_logging"),
+    (1, "_pytest.python"),
+    (2, "pluggy.callers"),
+])
+def test_ok__get_logger(depth: int, name: str) -> None:
+    assert get_logger(depth).name == name
diff --git a/testenv/tests/validators/__init__.py b/testenv/tests/validators/__init__.py
new file mode 100644
index 00000000..1e91f7fa
--- /dev/null
+++ b/testenv/tests/validators/__init__.py
@@ -0,0 +1,20 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
diff --git a/testenv/tests/validators/test_auth.py b/testenv/tests/validators/test_auth.py
new file mode 100644
index 00000000..f3cdf939
--- /dev/null
+++ b/testenv/tests/validators/test_auth.py
@@ -0,0 +1,130 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+from typing import List
+from typing import Any
+
+import pytest
+
+from kvmd.validators import ValidatorError
+from kvmd.validators.auth import valid_user
+from kvmd.validators.auth import valid_users_list
+from kvmd.validators.auth import valid_passwd
+from kvmd.validators.auth import valid_auth_token
+
+
+# =====
[email protected]("arg", [
+    "test-",
+    "glados",
+    "test",
+    "_",
+    "_foo_bar_",
+    " aix",
+])
+def test_ok__valid_user(arg: Any) -> None:
+    assert valid_user(arg) == arg.strip()
+
+
[email protected]("arg", [
+    "тест",
+    "-molestia",
+    "te~st",
+    "-",
+    "-foo_bar",
+    "  ",
+    "",
+    None,
+])
+def test_fail__valid_user(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_user(arg))
+
+
+# =====
[email protected]("arg, retval", [
+    ("foo, bar, ",     ["foo", "bar"]),
+    ("foo bar",      ["foo", "bar"]),
+    (["foo", "bar"], ["foo", "bar"]),
+    ("",             []),
+    (" ",            []),
+    (", ",           []),
+    (", foo, ",      ["foo"]),
+    ([],             []),
+])
+def test_ok__valid_users_list(arg: Any, retval: List) -> None:
+    assert valid_users_list(arg) == retval
+
+
[email protected]("arg", [None, [None], [""], [" "], ["user,"]])
+def test_fail__valid_users_list(arg: Any) -> None:  # pylint: disable=invalid-name
+    with pytest.raises(ValidatorError):
+        print(valid_users_list(arg))
+
+
+# =====
[email protected]("arg", [
+    "glados",
+    "test",
+    "_",
+    "_foo_bar_",
+    " aix",
+    "   ",
+    "",
+    " O(*#&@)FD*S)D(F   ",
+])
+def test_ok__valid_passwd(arg: Any) -> None:
+    assert valid_passwd(arg) == arg
+
+
[email protected]("arg", [
+    "тест",
+    "\n",
+    " \n",
+    "\n\n",
+    "\r",
+    None,
+])
+def test_fail__valid_passwd(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_passwd(arg))
+
+
+# =====
[email protected]("arg", [
+    ("0" * 64) + " ",
+    ("f" * 64) + " ",
+])
+def test_ok__valid_auth_token(arg: Any) -> None:
+    assert valid_auth_token(arg) == arg.strip()
+
+
[email protected]("arg", [
+    ("F" * 64),
+    "0" * 63,
+    "0" * 65,
+    "",
+    None,
+])
+def test_fail__valid_auth_token(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_auth_token(arg))
diff --git a/testenv/tests/validators/test_basic.py b/testenv/tests/validators/test_basic.py
new file mode 100644
index 00000000..96feb666
--- /dev/null
+++ b/testenv/tests/validators/test_basic.py
@@ -0,0 +1,144 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+from typing import List
+from typing import Any
+
+import pytest
+
+from kvmd.validators import ValidatorError
+from kvmd.validators.basic import valid_bool
+from kvmd.validators.basic import valid_number
+from kvmd.validators.basic import valid_int_f1
+from kvmd.validators.basic import valid_float_f01
+from kvmd.validators.basic import valid_string_list
+
+
+# =====
[email protected]("arg, retval", [
+    ("1",     True),
+    ("true",  True),
+    ("TRUE",  True),
+    ("yes ",  True),
+    (1,       True),
+    (True,    True),
+    ("0",     False),
+    ("false", False),
+    ("FALSE", False),
+    ("no ",   False),
+    (0,       False),
+    (False,   False),
+])
+def test_ok__valid_bool(arg: Any, retval: bool) -> None:
+    assert valid_bool(arg) == retval
+
+
[email protected]("arg", ["test", "", None, -1, "x"])
+def test_fail__valid_bool(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_bool(arg))
+
+
+# =====
[email protected]("arg", ["1 ", "-1", 1, -1, 0, 100500])
+def test_ok__valid_number(arg: Any) -> None:
+    assert valid_number(arg) == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, "1x", 100500.0])
+def test_fail__valid_number(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_number(arg))
+
+
[email protected]("arg", [-5, 0, 5, "-5 ", "0 ", "5 "])
+def test_ok__valid_number__min_max(arg: Any) -> None:
+    assert valid_number(arg, -5, 5) == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, -6, 6, "-6 ", "6 "])
+def test_fail__valid_number__min_max(arg: Any) -> None:  # pylint: disable=invalid-name
+    with pytest.raises(ValidatorError):
+        print(valid_number(arg, -5, 5))
+
+
+# =====
[email protected]("arg", [1, 5, "5 "])
+def test_ok__valid_int_f1(arg: Any) -> None:
+    value = valid_int_f1(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, -6, "-6 ", 0, "0 ", "5.0"])
+def test_fail__valid_int_f1(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_int_f1(arg))
+
+
+# =====
[email protected]("arg", [0.1, 1, 5, "5 ", "5.0 "])
+def test_ok__valid_float_f01(arg: Any) -> None:
+    value = valid_float_f01(arg)
+    assert type(value) == float  # pylint: disable=unidiomatic-typecheck
+    assert value == float(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, 0.0, "0.0", -6, "-6", 0, "0"])
+def test_fail__valid_float_f01(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_float_f01(arg))
+
+
+# =====
[email protected]("arg, retval", [
+    ("a, b, c",       ["a", "b", "c"]),
+    ("a b c",         ["a", "b", "c"]),
+    (["a", "b", "c"], ["a", "b", "c"]),
+    ("",              []),
+    (" ",             []),
+    (", ",            []),
+    (", a, ",         ["a"]),
+    ([],              []),
+])
+def test_ok__valid_string_list(arg: Any, retval: List) -> None:
+    assert valid_string_list(arg) == retval
+
+
[email protected]("arg, retval", [
+    ("1, 2, 3", [1, 2, 3]),
+    ("1 2 3",   [1, 2, 3]),
+    ([1, 2, 3], [1, 2, 3]),
+    ("",        []),
+    (" ",       []),
+    (", ",      []),
+    (", 1, ",   [1]),
+    ([],        []),
+])
+def test_ok__valid_string_list__subval(arg: Any, retval: List) -> None:  # pylint: disable=invalid-name
+    assert valid_string_list(arg, subval=int) == retval
+
+
[email protected]("arg", [None, [None]])
+def test_fail__valid_string_list(arg: Any) -> None:  # pylint: disable=invalid-name
+    with pytest.raises(ValidatorError):
+        print(valid_string_list(arg))
diff --git a/testenv/tests/validators/test_hw.py b/testenv/tests/validators/test_hw.py
new file mode 100644
index 00000000..2c93d3eb
--- /dev/null
+++ b/testenv/tests/validators/test_hw.py
@@ -0,0 +1,72 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+from typing import Any
+
+import pytest
+
+from kvmd.validators import ValidatorError
+from kvmd.validators.hw import valid_tty_speed
+from kvmd.validators.hw import valid_gpio_pin
+from kvmd.validators.hw import valid_gpio_pin_optional
+
+
+# =====
[email protected]("arg", ["1200 ", 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200])
+def test_ok__valid_tty_speed(arg: Any) -> None:
+    value = valid_tty_speed(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, 0, 1200.1])
+def test_fail__valid_tty_speed(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_tty_speed(arg))
+
+
+# =====
[email protected]("arg", ["0 ", 0, 1, 13])
+def test_ok__valid_gpio_pin(arg: Any) -> None:
+    value = valid_gpio_pin(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, -1, -13, 1.1])
+def test_fail__valid_gpio_pin(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_gpio_pin(arg))
+
+
+# =====
[email protected]("arg", ["0 ", -1, 0, 1, 13])
+def test_ok__valid_gpio_pin_optional(arg: Any) -> None:
+    value = valid_gpio_pin_optional(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, -2, -13, 1.1])
+def test_fail__valid_gpio_pin_optional(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_gpio_pin_optional(arg))
diff --git a/testenv/tests/validators/test_kvm.py b/testenv/tests/validators/test_kvm.py
new file mode 100644
index 00000000..f1050b36
--- /dev/null
+++ b/testenv/tests/validators/test_kvm.py
@@ -0,0 +1,169 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+from typing import Any
+
+import pytest
+
+from kvmd.keymap import KEYMAP
+
+from kvmd.validators import ValidatorError
+from kvmd.validators.kvm import valid_atx_button
+from kvmd.validators.kvm import valid_kvm_target
+from kvmd.validators.kvm import valid_log_seek
+from kvmd.validators.kvm import valid_stream_quality
+from kvmd.validators.kvm import valid_stream_fps
+from kvmd.validators.kvm import valid_hid_key
+from kvmd.validators.kvm import valid_hid_mouse_move
+from kvmd.validators.kvm import valid_hid_mouse_button
+from kvmd.validators.kvm import valid_hid_mouse_wheel
+
+
+# =====
[email protected]("arg", ["POWER ", "POWER_LONG ", "RESET "])
+def test_ok__valid_atx_button(arg: Any) -> None:
+    assert valid_atx_button(arg) == arg.strip().lower()
+
+
[email protected]("arg", ["test", "", None])
+def test_fail__valid_atx_button(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_atx_button(arg))
+
+
+# =====
[email protected]("arg", ["KVM ", "SERVER "])
+def test_ok__valid_kvm_target(arg: Any) -> None:
+    assert valid_kvm_target(arg) == arg.strip().lower()
+
+
[email protected]("arg", ["test", "", None])
+def test_fail__valid_kvm_target(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_kvm_target(arg))
+
+
+# =====
[email protected]("arg", ["0 ", 0, 1, 13])
+def test_ok__valid_log_seek(arg: Any) -> None:
+    value = valid_log_seek(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, -1, -13, 1.1])
+def test_fail__valid_log_seek(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_log_seek(arg))
+
+
+# =====
[email protected]("arg", ["1 ", 20, 100])
+def test_ok__valid_stream_quality(arg: Any) -> None:
+    value = valid_stream_quality(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, 0, 101, 1.1])
+def test_fail__valid_stream_quality(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_stream_quality(arg))
+
+
+# =====
[email protected]("arg", ["1 ", 30])
+def test_ok__valid_stream_fps(arg: Any) -> None:
+    value = valid_stream_fps(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, 31, 1.1])
+def test_fail__valid_stream_fps(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_stream_fps(arg))
+
+
+# =====
+def test_ok__valid_hid_key() -> None:
+    for key in KEYMAP:
+        print(valid_hid_key(key))
+        print(valid_hid_key(key + " "))
+
+
[email protected]("arg", ["test", "", None, "keya"])
+def test_fail__valid_hid_key(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_hid_key(arg))
+
+
+# =====
[email protected]("arg", [-20000, "1 ", "-1", 1, -1, 0, "20000 "])
+def test_ok__valid_hid_mouse_move(arg: Any) -> None:
+    assert valid_hid_mouse_move(arg) == int(str(arg).strip())
+
+
+def test_ok__valid_hid_mouse_move__m50000() -> None:
+    assert valid_hid_mouse_move(-50000) == -32768
+
+
+def test_ok__valid_hid_mouse_move__p50000() -> None:
+    assert valid_hid_mouse_move(50000) == 32767
+
+
[email protected]("arg", ["test", "", None, 1.1])
+def test_fail__valid_hid_mouse_move(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_hid_mouse_move(arg))
+
+
+# =====
[email protected]("arg", ["LEFT ", "RIGHT "])
+def test_ok__valid_hid_mouse_button(arg: Any) -> None:
+    assert valid_hid_mouse_button(arg) == arg.strip().lower()
+
+
[email protected]("arg", ["test", "", None])
+def test_fail__valid_hid_mouse_button(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_hid_mouse_button(arg))
+
+
+# =====
[email protected]("arg", [-100, "1 ", "-1", 1, -1, 0, "100 "])
+def test_ok__valid_hid_mouse_wheel(arg: Any) -> None:
+    assert valid_hid_mouse_wheel(arg) == int(str(arg).strip())
+
+
+def test_ok__valid_hid_mouse_wheel__m200() -> None:
+    assert valid_hid_mouse_wheel(-200) == -128
+
+
+def test_ok__valid_hid_mouse_wheel__p200() -> None:
+    assert valid_hid_mouse_wheel(200) == 127
+
+
[email protected]("arg", ["test", "", None, 1.1])
+def test_fail__valid_hid_mouse_wheel(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_hid_mouse_wheel(arg))
diff --git a/testenv/tests/validators/test_net.py b/testenv/tests/validators/test_net.py
new file mode 100644
index 00000000..eab67c9a
--- /dev/null
+++ b/testenv/tests/validators/test_net.py
@@ -0,0 +1,122 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+from typing import Any
+
+import pytest
+
+from kvmd.validators import ValidatorError
+from kvmd.validators.net import valid_ip_or_host
+from kvmd.validators.net import valid_ip
+from kvmd.validators.net import valid_rfc_host
+from kvmd.validators.net import valid_port
+
+
+# =====
[email protected]("arg", [
+    "yandex.ru ",
+    "foobar",
+    "foo-bar.ru",
+    "127.0.0.1",
+    "8.8.8.8",
+    "::",
+    "::1",
+    "2001:500:2f::f",
+])
+def test_ok__valid_ip_or_host(arg: Any) -> None:
+    assert valid_ip_or_host(arg) == arg.strip()
+
+
[email protected]("arg", [
+    "foo_bar.ru",
+    "1.1.1.",
+    ":",
+    "",
+    None,
+])
+def test_fail__valid_ip_or_host(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_ip_or_host(arg))
+
+
+# =====
[email protected]("arg", [
+    "127.0.0.1 ",
+    "8.8.8.8",
+    "::",
+    "::1",
+    "2001:500:2f::f",
+])
+def test_ok__valid_ip(arg: Any) -> None:
+    assert valid_ip(arg) == arg.strip()
+
+
[email protected]("arg", [
+    "ya.ru",
+    "1",
+    "1.1.1",
+    "1.1.1.",
+    ":",
+    "",
+    None,
+])
+def test_fail__valid_ip(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_ip(arg))
+
+
+# =====
[email protected]("arg", [
+    "yandex.ru ",
+    "foobar",
+    "foo-bar.ru",
+    "z0r.de",
+    "11.ru",
+    "127.0.0.1",
+])
+def test_ok__valid_rfc_host(arg: Any) -> None:
+    assert valid_rfc_host(arg) == arg.strip()
+
+
[email protected]("arg", [
+    "foobar.ru.",
+    "foo_bar.ru",
+    "",
+    None,
+])
+def test_fail__valid_rfc_host(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_rfc_host(arg))
+
+
+# =====
[email protected]("arg", ["0 ", 0, "22", 443, 65535])
+def test_ok__valid_port(arg: Any) -> None:
+    value = valid_port(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(arg).strip())
+
+
[email protected]("arg", ["test", "", None, 1.1])
+def test_fail__valid_port(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_port(arg))
diff --git a/testenv/tests/validators/test_os.py b/testenv/tests/validators/test_os.py
new file mode 100644
index 00000000..b280b4b3
--- /dev/null
+++ b/testenv/tests/validators/test_os.py
@@ -0,0 +1,118 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <[email protected]>                    #
+#                                                                            #
+#    This program is free software: you can redistribute it and/or modify    #
+#    it under the terms of the GNU General Public License as published by    #
+#    the Free Software Foundation, either version 3 of the License, or       #
+#    (at your option) any later version.                                     #
+#                                                                            #
+#    This program is distributed in the hope that it will be useful,         #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
+#    GNU General Public License for more details.                            #
+#                                                                            #
+#    You should have received a copy of the GNU General Public License       #
+#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+import os
+
+from typing import List
+from typing import Any
+
+import pytest
+
+from kvmd.validators import ValidatorError
+from kvmd.validators.os import valid_abs_path
+from kvmd.validators.os import valid_abs_path_exists
+from kvmd.validators.os import valid_unix_mode
+from kvmd.validators.os import valid_command
+
+
+# =====
[email protected]("arg, retval", [
+    ("/..",          "/"),
+    ("/root/..",     "/"),
+    ("/root",        "/root"),
+    ("/f/o/o/b/a/r", "/f/o/o/b/a/r"),
+    ("~",            os.path.abspath(".") + "/~"),
+    ("/foo~",        "/foo~"),
+    ("/foo/~",        "/foo/~"),
+    (".",            os.path.abspath(".")),
+])
+def test_ok__valid_abs_path(arg: Any, retval: str) -> None:
+    assert valid_abs_path(arg) == retval
+
+
[email protected]("arg", ["", " ", None])
+def test_fail__valid_abs_path(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_abs_path(arg))
+
+
+# =====
[email protected]("arg, retval", [
+    ("/..",          "/"),
+    ("/root/..",     "/"),
+    ("/root",        "/root"),
+    (".",            os.path.abspath(".")),
+])
+def test_ok__valid_abs_path_exists(arg: Any, retval: str) -> None:
+    assert valid_abs_path_exists(arg) == retval
+
+
[email protected]("arg", [
+    "/f/o/o/b/a/r",
+    "~",
+    "/foo~",
+    "/foo/~",
+    "",
+    None,
+])
+def test_fail__valid_abs_path_exists(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_abs_path_exists(arg))
+
+
+# =====
[email protected]("arg", [0, 5, "1000"])
+def test_ok__valid_unix_mode(arg: Any) -> None:
+    value = valid_unix_mode(arg)
+    assert type(value) == int  # pylint: disable=unidiomatic-typecheck
+    assert value == int(str(value).strip())
+
+
[email protected]("arg", ["test", "", None, -6, "-6", "5.0"])
+def test_fail__valid_unix_mode(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_unix_mode(arg))
+
+
+# =====
[email protected]("arg, retval", [
+    (["/bin/true"],          ["/bin/true"]),
+    (["/bin/true", 1, 2, 3], ["/bin/true", "1", "2", "3"]),
+    ("/bin/true, 1, 2, 3,",  ["/bin/true", "1", "2", "3"]),
+    ("/bin/true",            ["/bin/true"]),
+])
+def test_ok__valid_command(arg: Any, retval: List[str]) -> None:
+    assert valid_command(arg) == retval
+
+
[email protected]("arg", [
+    ["/bin/blahblahblah"],
+    ["/bin/blahblahblah", 1, 2, 3],
+    [" "],
+    [],
+    "/bin/blahblahblah, 1, 2, 3,",
+    "/bin/blahblahblah",
+    " ",
+])
+def test_fail__valid_command(arg: Any) -> None:
+    with pytest.raises(ValidatorError):
+        print(valid_command(arg))
diff --git a/testenv/tox.ini b/testenv/tox.ini
index 55d51892..b63b5071 100644
--- a/testenv/tox.ini
+++ b/testenv/tox.ini
@@ -8,14 +8,14 @@ sitepackages = true
 changedir = /src
 
 [testenv:flake8]
-commands = flake8 --config=testenv/linters/flake8.ini kvmd genmap.py tests
+commands = flake8 --config=testenv/linters/flake8.ini kvmd genmap.py testenv/tests
 deps =
 	flake8
 	flake8-double-quotes
 	-rrequirements.txt
 
 [testenv:pylint]
-commands = pylint --rcfile=testenv/linters/pylint.ini --output-format=colorized --reports=no kvmd genmap.py tests
+commands = pylint --rcfile=testenv/linters/pylint.ini --output-format=colorized --reports=no kvmd genmap.py testenv/tests
 deps =
 	pylint
 	pytest
@@ -24,19 +24,21 @@ deps =
 	-rrequirements.txt
 
 [testenv:mypy]
-commands = mypy --config-file=testenv/linters/mypy.ini --cache-dir=testenv/.mypy_cache kvmd genmap.py tests
+commands = mypy --config-file=testenv/linters/mypy.ini --cache-dir=testenv/.mypy_cache kvmd genmap.py testenv/tests
 deps =
 	mypy
 	-rrequirements.txt
 
 [testenv:vulture]
-commands = vulture --ignore-names=_format_P,Plugin --ignore-decorators=@_exposed,@_system_task,@pytest.fixture kvmd genmap.py tests testenv/linters/vulture-wl.py
+commands = vulture --ignore-names=_format_P,Plugin --ignore-decorators=@_exposed,@_system_task,@pytest.fixture kvmd genmap.py testenv/tests testenv/linters/vulture-wl.py
 deps =
 	vulture
 	-rrequirements.txt
 
 [testenv:pytest]
-commands = py.test -vv --cov-config=testenv/linters/coverage.ini --cov-report=term-missing --cov=kvmd tests
+commands = py.test -vv --cov-config=testenv/linters/coverage.ini --cov-report=term-missing --cov=kvmd testenv/tests
+setenv =
+	PYTHONPATH=/src
 deps =
 	pytest
 	pytest-cov