Refactor flow for easier access to some files (avoid things like jrnl.Journal.Journal and jrnl.jrnl co-existing) (#1662)

* run format

* rename cli.py to main.py

* rename jrnl.py to controller.py

* move journal class files into journals dir

* rename start -> run in controller.py

tests/unit/test_controller.py

@@ -0,0 +1,51 @@
+# Copyright © 2012-2023 jrnl contributors
+# License: https://www.gnu.org/licenses/gpl-3.0.html
+
+import random
+import string
+from unittest import mock
+
+import pytest
+
+import jrnl
+from jrnl.args import parse_args
+from jrnl.controller import _display_search_results
+
+
+@pytest.fixture
+def random_string():
+    return "".join(random.choices(string.ascii_uppercase + string.digits, k=25))
+
+
+@pytest.mark.parametrize("export_format", ["pretty", "short"])
+@mock.patch("builtins.print")
+@mock.patch("jrnl.controller.Journal.pprint")
+def test_display_search_results_pretty_short(mock_pprint, mock_print, export_format):
+    mock_args = parse_args(["--format", export_format])
+    test_journal = mock.Mock(wraps=jrnl.journals.Journal)
+
+    _display_search_results(mock_args, test_journal)
+
+    mock_print.assert_called_once_with(mock_pprint.return_value)
+
+
+@pytest.mark.parametrize(
+    "export_format", ["markdown", "json", "xml", "yaml", "fancy", "dates"]
+)
+@mock.patch("jrnl.plugins.get_exporter")
+@mock.patch("builtins.print")
+def test_display_search_results_builtin_plugins(
+    mock_print, mock_exporter, export_format, random_string
+):
+    test_filename = random_string
+    mock_args = parse_args(["--format", export_format, "--file", test_filename])
+
+    test_journal = mock.Mock(wraps=jrnl.journals.Journal)
+    mock_export = mock.Mock()
+    mock_exporter.return_value.export = mock_export
+
+    _display_search_results(mock_args, test_journal)
+
+    mock_exporter.assert_called_once_with(export_format)
+    mock_export.assert_called_once_with(test_journal, test_filename)
+    mock_print.assert_called_once_with(mock_export.return_value)