Implement datetime handling in pytest-bdd

- This was awful and convoluted

Co-authored-by: Micah Jerome Ellison <micah.jerome.ellison@gmail.com>

tests/unit/test_display.py

@@ -0,0 +1,23 @@
+import argparse
+import jrnl
+import pytest
+from unittest import mock
+from jrnl.jrnl import _display_search_results
+
+
+# fmt: off
+# see: https://github.com/psf/black/issues/664
+@pytest.mark.parametrize("export_format", [ "pretty", "short","markdown"])
+#fmt: on
+@mock.patch.object(argparse, "Namespace", return_value={"export": "markdown", "filename": "irrele.vant"})
+def test_export_format(mock_args, export_format):
+
+    test_journal = jrnl.Journal.Journal
+    mock_args.export = export_format
+    #fmt: off
+    # see: https://github.com/psf/black/issues/664
+    with mock.patch("builtins.print") as mock_spy_print, \
+    mock.patch('jrnl.Journal.Journal.pprint') as mock_pprint:
+        _display_search_results(mock_args, test_journal)
+    mock_spy_print.assert_called_once_with(mock_pprint())
+    #fmt: on