feat: changes screen implementation (#117)

Add support of changes generation. Changes will be generated (unless explicitly asked not to) automatically during check process (i.e. `repo-update --dry-run` and aliases) and uploaded to the remote server. Changes can be reviewed either by web interface or by special subcommands.

Changes will be automatically cleared during next successful build

tests/ahriman/application/handlers/test_handler_change.py

@@ -0,0 +1,98 @@
+import argparse
+import pytest
+
+from pytest_mock import MockerFixture
+
+from ahriman.application.handlers import Change
+from ahriman.core.configuration import Configuration
+from ahriman.core.database import SQLite
+from ahriman.core.repository import Repository
+from ahriman.models.action import Action
+from ahriman.models.changes import Changes
+
+
+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.action = Action.List
+    args.exit_code = False
+    args.package = "package"
+    return args
+
+
+def test_run(args: argparse.Namespace, configuration: Configuration, repository: Repository,
+             mocker: MockerFixture) -> None:
+    """
+    must run command
+    """
+    args = _default_args(args)
+    mocker.patch("ahriman.core.repository.Repository.load", return_value=repository)
+    application_mock = mocker.patch("ahriman.core.status.client.Client.package_changes_get",
+                                    return_value=Changes("sha", "change"))
+    check_mock = mocker.patch("ahriman.application.handlers.Handler.check_if_empty")
+    print_mock = mocker.patch("ahriman.core.formatters.Printer.print")
+
+    _, repository_id = configuration.check_loaded()
+    Change.run(args, repository_id, configuration, report=False)
+    application_mock.assert_called_once_with(args.package)
+    check_mock.assert_called_once_with(False, False)
+    print_mock.assert_called_once_with(verbose=True, log_fn=pytest.helpers.anyvar(int), separator="")
+
+
+def test_run_empty_exception(args: argparse.Namespace, configuration: Configuration, repository: Repository,
+                             mocker: MockerFixture) -> None:
+    """
+    must raise ExitCode exception on empty changes result
+    """
+    args = _default_args(args)
+    args.exit_code = True
+    mocker.patch("ahriman.core.repository.Repository.load", return_value=repository)
+    mocker.patch("ahriman.core.status.client.Client.package_changes_get", return_value=Changes())
+    check_mock = mocker.patch("ahriman.application.handlers.Handler.check_if_empty")
+
+    _, repository_id = configuration.check_loaded()
+    Change.run(args, repository_id, configuration, report=False)
+    check_mock.assert_called_once_with(True, True)
+
+
+def test_run_remove(args: argparse.Namespace, configuration: Configuration, repository: Repository,
+                    mocker: MockerFixture) -> None:
+    """
+    must remove package changes
+    """
+    args = _default_args(args)
+    args.action = Action.Remove
+    mocker.patch("ahriman.core.repository.Repository.load", return_value=repository)
+    update_mock = mocker.patch("ahriman.core.status.client.Client.package_changes_set")
+
+    _, repository_id = configuration.check_loaded()
+    Change.run(args, repository_id, configuration, report=False)
+    update_mock.assert_called_once_with(args.package, Changes())
+
+
+def test_imply_with_report(args: argparse.Namespace, configuration: Configuration, database: SQLite,
+                           mocker: MockerFixture) -> None:
+    """
+    must create application object with native reporting
+    """
+    args = _default_args(args)
+    mocker.patch("ahriman.core.database.SQLite.load", return_value=database)
+    load_mock = mocker.patch("ahriman.core.repository.Repository.load")
+
+    _, repository_id = configuration.check_loaded()
+    Change.run(args, repository_id, configuration, report=False)
+    load_mock.assert_called_once_with(repository_id, configuration, database, report=True, refresh_pacman_database=0)
+
+
+def test_disallow_multi_architecture_run() -> None:
+    """
+    must not allow multi architecture run
+    """
+    assert not Change.ALLOW_MULTI_ARCHITECTURE_RUN