add ability to check for service updates

tests/ahriman/application/handlers/test_handler_service_updates.py

@@ -0,0 +1,58 @@
+import argparse
+
+from pytest_mock import MockerFixture
+
+from ahriman import version
+from ahriman.application.handlers import ServiceUpdates
+from ahriman.core.configuration import Configuration
+from ahriman.core.repository import Repository
+from ahriman.models.package import Package
+
+
+def _default_args(args: argparse.Namespace) -> argparse.Namespace:
+    """
+    default arguments for these test cases
+
+    Args:
+        args(argparse.Namespace): command line arguments fixture
+
+    Returns:
+        argparse.Namespace: generated arguments for these test cases
+    """
+    args.exit_code = False
+    return args
+
+
+def test_run(args: argparse.Namespace, configuration: Configuration, repository: Repository,
+             package_ahriman: Package, mocker: MockerFixture) -> None:
+    """
+    must run command
+    """
+    package_ahriman.version = "0.0.0"
+    args = _default_args(args)
+    mocker.patch("ahriman.core.repository.Repository.load", return_value=repository)
+    package_mock = mocker.patch("ahriman.models.package.Package.from_aur", return_value=package_ahriman)
+    application_mock = mocker.patch("ahriman.core.formatters.Printer.print")
+    check_mock = mocker.patch("ahriman.application.handlers.Handler.check_if_empty")
+
+    ServiceUpdates.run(args, "x86_64", configuration, report=False, unsafe=False)
+    package_mock.assert_called_once_with(package_ahriman.base, repository.pacman)
+    application_mock.assert_called_once_with(verbose=True, separator=" -> ")
+    check_mock.assert_called_once_with(args.exit_code, True)
+
+
+def test_run_skip(args: argparse.Namespace, configuration: Configuration, repository: Repository,
+                  package_ahriman: Package, mocker: MockerFixture) -> None:
+    """
+    must do not perform any actions if package is up-to-date
+    """
+    package_ahriman.version = f"{version.__version__}-1"
+    args = _default_args(args)
+    mocker.patch("ahriman.core.repository.Repository.load", return_value=repository)
+    mocker.patch("ahriman.models.package.Package.from_aur", return_value=package_ahriman)
+    application_mock = mocker.patch("ahriman.core.formatters.Printer.print")
+    check_mock = mocker.patch("ahriman.application.handlers.Handler.check_if_empty")
+
+    ServiceUpdates.run(args, "x86_64", configuration, report=False, unsafe=False)
+    application_mock.assert_not_called()
+    check_mock.assert_not_called()