remove py2 remnants and use mocks in tests

fstring wip
Run pyupgrade
fix broken pyupgrade fstring
run pyupgrade on plugin dir
fixup! remove py2 remnants and use mocks in tests
small print bugfix
The file=sys.stderr was part of the format(), so an error got printed to
stdout
Drop use of codecs package
Use builtins.open() instead
fixup! remove py2 remnants and use mocks in tests

features/steps/core.py

@@ -1,5 +1,4 @@
-from __future__ import unicode_literals
-from __future__ import absolute_import
+from unittest.mock import patch
 
 from behave import given, when, then
 from jrnl import cli, install, Journal, util, plugins
@@ -10,10 +9,13 @@ import os
 import json
 import yaml
 import keyring
+import tzlocal
+import shlex
+import sys
 
 
 class TestKeyring(keyring.backend.KeyringBackend):
-    """A test keyring that just stores its valies in a hash"""
+    """A test keyring that just stores its values in a hash"""
 
     priority = 1
     keys = defaultdict(dict)
@@ -31,15 +33,6 @@ class TestKeyring(keyring.backend.KeyringBackend):
 keyring.set_keyring(TestKeyring())
 
 
-try:
-    from io import StringIO
-except ImportError:
-    from cStringIO import StringIO
-import tzlocal
-import shlex
-import sys
-
-
 def ushlex(command):
     if sys.version_info[0] == 3:
         return shlex.split(command)
@@ -73,18 +66,41 @@ def set_config(context, config_file):
             cf.write("version: {}".format(__version__))
 
 
+def _mock_getpass(inputs):
+    def prompt_return(prompt="Password: "):
+        print(prompt)
+        return next(inputs)
+    return prompt_return
+
+
+def _mock_input(inputs):
+    def prompt_return(prompt=""):
+        val = next(inputs)
+        print(prompt, val)
+        return val
+    return prompt_return
+
+
 @when('we run "{command}" and enter')
-@when('we run "{command}" and enter "{inputs}"')
-def run_with_input(context, command, inputs=None):
-    text = inputs or context.text
+@when('we run "{command}" and enter "{inputs1}"')
+@when('we run "{command}" and enter "{inputs1}" and "{inputs2}"')
+def run_with_input(context, command, inputs1="", inputs2=""):
+    # create an iterator through all inputs. These inputs will be fed one by one
+    # to the mocked calls for 'input()', 'util.getpass()' and 'sys.stdin.read()'
+    text = iter((inputs1, inputs2)) if inputs1 else iter(context.text.split("\n"))
     args = ushlex(command)[1:]
-    buffer = StringIO(text.strip())
-    util.STDIN = buffer
-    try:
-        cli.run(args or [])
-        context.exit_status = 0
-    except SystemExit as e:
-        context.exit_status = e.code
+    with patch("builtins.input", side_effect=_mock_input(text)) as mock_input:
+        with patch("jrnl.util.getpass", side_effect=_mock_getpass(text)) as mock_getpass:
+            with patch("sys.stdin.read", side_effect=text) as mock_read:
+                try:
+                    cli.run(args or [])
+                    context.exit_status = 0
+                except SystemExit as e:
+                    context.exit_status = e.code
+
+                # assert at least one of the mocked input methods got called
+                assert mock_input.called or mock_getpass.called or mock_read.called
+
 
 
 @when('we run "{command}"')
@@ -190,28 +206,24 @@ def check_output_time_inline(context, text):
 def check_output_inline(context, text=None):
     text = text or context.text
     out = context.stdout_capture.getvalue()
-    if isinstance(out, bytes):
-        out = out.decode('utf-8')
     assert text in out, text
 
 
 @then('the output should not contain "{text}"')
 def check_output_not_inline(context, text):
     out = context.stdout_capture.getvalue()
-    if isinstance(out, bytes):
-        out = out.decode('utf-8')
     assert text not in out
 
 
 @then('we should see the message "{text}"')
 def check_message(context, text):
-    out = context.messages.getvalue()
+    out = context.stderr_capture.getvalue()
     assert text in out, [text, out]
 
 
 @then('we should not see the message "{text}"')
 def check_not_message(context, text):
-    out = context.messages.getvalue()
+    out = context.stderr_capture.getvalue()
     assert text not in out, [text, out]