money transfer --file: Use click.Path() (#469)

silkaj/money/transfer.py

@@ -105,6 +105,7 @@ Sending to many recipients is possible:\n\
     "file_path",
     "--file",
     "-f",
+    type=click.Path(exists=True, dir_okay=False, path_type=Path),
     help="File`s path containing a list of amounts in absolute or \
 relative reference and recipients` pubkeys",
     cls=tools.MutuallyExclusiveOption,
@@ -126,7 +127,7 @@ def transfer_money(
     amountsud: List[float],
     allsources: bool,
     recipients: List[str],
-    file_path: str,
+    file_path: Path,
     comment: str,
     outputbackchange: str,
     yes: bool,
@@ -196,7 +197,7 @@ No transaction sent.",
 
 
 def parse_file_containing_amounts_recipients(
-    file_path: str,
+    file_path: Path,
 ) -> Tuple[List[int], List[str]]:
     """
     Parse file in a specific format
@@ -213,7 +214,7 @@ def parse_file_containing_amounts_recipients(
     """
     reference = ""
     amounts, recipients = [], []
-    with Path(file_path).open(encoding="utf-8") as file:
+    with file_path.open(encoding="utf-8") as file:
         for n, raw_line in enumerate(file):
             line = shlex.split(raw_line, True)
             if line:

tests/unit/money/test_transfer_file.py

@@ -24,7 +24,7 @@ from silkaj.money.transfer import parse_file_containing_amounts_recipients
 from tests.patched.money import patched_get_ud_value
 from tests.patched.test_constants import mock_ud_value
 
-FILE_PATH = "recipients.txt"
+FILE_PATH = Path("recipients.txt")
 
 
 @pytest.mark.parametrize(
@@ -52,7 +52,7 @@ def test_parse_file_containing_amounts_recipients(
 
     runner = CliRunner()
     with runner.isolated_filesystem():
-        Path(FILE_PATH).write_text(file_content, encoding="utf-8")
+        FILE_PATH.write_text(file_content, encoding="utf-8")
         amounts, recipients = parse_file_containing_amounts_recipients(FILE_PATH)
     assert amounts == amounts_exp
     assert recipients == recipients_exp
@@ -78,7 +78,7 @@ SPEC_ERR = "No amounts or recipients specified"
 def test_parse_file_containing_amounts_recipients_errors(file_content, error, capsys):
     runner = CliRunner()
     with runner.isolated_filesystem():
-        Path(FILE_PATH).write_text(file_content, encoding="utf-8")
+        FILE_PATH.write_text(file_content, encoding="utf-8")
         with pytest.raises(SystemExit):
             parse_file_containing_amounts_recipients(FILE_PATH)
     assert error in capsys.readouterr().out