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# coding=utf-8
"""
Cmd2 unit/functional testing
"""
import argparse
import sys
from contextlib import (
redirect_stderr,
redirect_stdout,
)
from typing import (
List,
Optional,
Union,
)
from unittest import (
mock,
)
from pytest import (
fixture,
)
import cmd2
from cmd2.rl_utils import (
readline,
)
from cmd2.utils import (
StdSim,
)
def verify_help_text(
cmd2_app: cmd2.Cmd, help_output: Union[str, List[str]], verbose_strings: Optional[List[str]] = None
) -> None:
"""This function verifies that all expected commands are present in the help text.
:param cmd2_app: instance of cmd2.Cmd
:param help_output: output of help, either as a string or list of strings
:param verbose_strings: optional list of verbose strings to search for
"""
if isinstance(help_output, str):
help_text = help_output
else:
help_text = ''.join(help_output)
commands = cmd2_app.get_visible_commands()
for command in commands:
assert command in help_text
if verbose_strings:
for verbose_string in verbose_strings:
assert verbose_string in help_text
# Help text for the history command
HELP_HISTORY = """Usage: history [-h] [-r | -e | -o FILE | -t TRANSCRIPT_FILE | -c] [-s] [-x]
[-v] [-a]
[arg]
View, run, edit, save, or clear previously entered commands
positional arguments:
arg empty all history items
a one history item by number
a..b, a:b, a:, ..b items by indices (inclusive)
string items containing string
/regex/ items matching regular expression
optional arguments:
-h, --help show this help message and exit
-r, --run run selected history items
-e, --edit edit and then run selected history items
-o, --output_file FILE
output commands to a script file, implies -s
-t, --transcript TRANSCRIPT_FILE
output commands and results to a transcript file,
implies -s
-c, --clear clear all history
formatting:
-s, --script output commands in script format, i.e. without command
numbers
-x, --expanded output fully parsed commands with any aliases and
macros expanded, instead of typed commands
-v, --verbose display history and include expanded commands if they
differ from the typed command
-a, --all display all commands, including ones persisted from
previous sessions
"""
# Output from the shortcuts command with default built-in shortcuts
SHORTCUTS_TXT = """Shortcuts for other commands:
!: shell
?: help
@: run_script
@@: _relative_run_script
"""
# Output from the set command
SET_TXT = (
"Name Value Description \n"
"====================================================================================================================\n"
"allow_style Terminal Allow ANSI text style sequences in output (valid values: \n"
" Always, Never, Terminal) \n"
"always_show_hint False Display tab completion hint even when completion suggestions\n"
" print \n"
"debug False Show full traceback on exception \n"
"echo False Echo command issued into output \n"
"editor vim Program used by 'edit' \n"
"feedback_to_output False Include nonessentials in '|', '>' results \n"
"max_completion_items 50 Maximum number of CompletionItems to display during tab \n"
" completion \n"
"quiet False Don't print nonessential feedback \n"
"scripts_add_to_history True Scripts and pyscripts add commands to history \n"
"timing False Report execution times \n"
)
def normalize(block):
"""Normalize a block of text to perform comparison.
Strip newlines from the very beginning and very end Then split into separate lines and strip trailing whitespace
from each line.
"""
assert isinstance(block, str)
block = block.strip('\n')
return [line.rstrip() for line in block.splitlines()]
def run_cmd(app, cmd):
"""Clear out and err StdSim buffers, run the command, and return out and err"""
saved_sysout = sys.stdout
sys.stdout = app.stdout
# This will be used to capture app.stdout and sys.stdout
copy_cmd_stdout = StdSim(app.stdout)
# This will be used to capture sys.stderr
copy_stderr = StdSim(sys.stderr)
try:
app.stdout = copy_cmd_stdout
with redirect_stdout(copy_cmd_stdout):
with redirect_stderr(copy_stderr):
app.onecmd_plus_hooks(cmd)
finally:
app.stdout = copy_cmd_stdout.inner_stream
sys.stdout = saved_sysout
out = copy_cmd_stdout.getvalue()
err = copy_stderr.getvalue()
return normalize(out), normalize(err)
@fixture
def base_app():
return cmd2.Cmd(include_py=True, include_ipy=True)
# These are odd file names for testing quoting of them
odd_file_names = ['nothingweird', 'has spaces', '"is_double_quoted"', "'is_single_quoted'"]
def complete_tester(text: str, line: str, begidx: int, endidx: int, app) -> Optional[str]:
"""
This is a convenience function to test cmd2.complete() since
in a unit test environment there is no actual console readline
is monitoring. Therefore we use mock to provide readline data
to complete().
:param text: the string prefix we are attempting to match
:param line: the current input line with leading whitespace removed
:param begidx: the beginning index of the prefix text
:param endidx: the ending index of the prefix text
:param app: the cmd2 app that will run completions
:return: The first matched string or None if there are no matches
Matches are stored in app.completion_matches
These matches also have been sorted by complete()
"""
def get_line():
return line
def get_begidx():
return begidx
def get_endidx():
return endidx
# Run the readline tab completion function with readline mocks in place
with mock.patch.object(readline, 'get_line_buffer', get_line):
with mock.patch.object(readline, 'get_begidx', get_begidx):
with mock.patch.object(readline, 'get_endidx', get_endidx):
return app.complete(text, 0)
def find_subcommand(action: argparse.ArgumentParser, subcmd_names: List[str]) -> argparse.ArgumentParser:
if not subcmd_names:
return action
cur_subcmd = subcmd_names.pop(0)
for sub_action in action._actions:
if isinstance(sub_action, argparse._SubParsersAction):
for choice_name, choice in sub_action.choices.items():
if choice_name == cur_subcmd:
return find_subcommand(choice, subcmd_names)
break
raise ValueError(f"Could not find subcommand '{subcmd_names}'")
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