Add tests (#1) (#5)

* add models tests (#1)

also replace single quote to double one to confort PEP docstring
+ move _check_output to class properties to make it available for
mocking

* alpm tests implementation

* try to replace os with pathlib

* update tests for pathlib

* fix includes glob and trim version from dependencies

* build_tools package tests

* repository component tests

* add sign tests

* complete status tests

* handle exceptions in actual_version calls

* complete core tests

* move configuration to root conftest

* application tests

* complete application tests

* change copyright to more generic one

* base web tests

* complete web tests

* complete testkit

also add argument parsers test

tests/ahriman/core/alpm/test_pacman.py

@@ -0,0 +1,10 @@
+from ahriman.core.alpm.pacman import Pacman
+
+
+def test_all_packages(pacman: Pacman) -> None:
+    """
+    package list must not be empty
+    """
+    packages = pacman.all_packages()
+    assert packages
+    assert "pacman" in packages