Added ability to auto-prompt for password for encrypted journals

Only uses password when prompted, and doesn't get in the way of other
input prompts. This allows us to run the same scenarios on both
encrypted journals and other journal types.

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

features/steps/core.py

@@ -130,6 +130,16 @@ def set_config(context, config_file):
             cf.write("version: {}".format(__version__))
 
 
+@given('we use the password "{password}" if prompted')
+def use_password_forever(context, password):
+    context.password = password
+
+
+@given('we use the password "{password}" {num:d} times if prompted')
+def use_password(context, password, num=1):
+    context.password = iter([password] * num)
+
+
 @given("we have a keyring")
 def set_keyring(context):
     keyring.set_keyring(TestKeyring())
@@ -210,8 +220,9 @@ def matches_editor_arg(context, regex):
 
 
 def _mock_getpass(inputs):
-    def prompt_return(prompt="Password: "):
-        print(prompt)
+    def prompt_return(prompt=""):
+        if type(inputs) == str:
+            return inputs
         try:
             return next(inputs)
         except StopIteration:
@@ -251,11 +262,16 @@ def run_with_input(context, command, inputs=""):
         context.editor_file = tmpfile
         Path(tmpfile).touch()
 
+    if "password" in context:
+        password = context.password
+    else:
+        password = text
+
     # fmt: off
     # see: https://github.com/psf/black/issues/664
     with \
         patch("builtins.input", side_effect=_mock_input(text)) as mock_input, \
-        patch("getpass.getpass", side_effect=_mock_getpass(text)) as mock_getpass, \
+        patch("getpass.getpass", side_effect=_mock_getpass(password)) as mock_getpass, \
         patch("sys.stdin.read", side_effect=text) as mock_read, \
         patch("subprocess.call", side_effect=_mock_editor) as mock_editor \
     :
@@ -323,12 +339,23 @@ def run(context, command, text="", cache_dir=None):
     def _mock_editor(command):
         context.editor_command = command
 
+    if "password" in context:
+        password = context.password
+    else:
+        password = iter(text)
+
     try:
-        with patch("sys.argv", args), patch(
-            "subprocess.call", side_effect=_mock_editor
-        ), patch("sys.stdin.read", side_effect=lambda: text):
+        # fmt: off
+        # see: https://github.com/psf/black/issues/664
+        with \
+            patch("sys.argv", args), \
+            patch("getpass.getpass", side_effect=_mock_getpass(password)), \
+            patch("subprocess.call", side_effect=_mock_editor), \
+            patch("sys.stdin.read", side_effect=lambda: text) \
+        :
             cli(args[1:])
             context.exit_status = 0
+        # fmt: on
     except SystemExit as e:
         context.exit_status = e.code