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# ############################################################################ #
# #
# ::: :::::::: #
# test.py :+: :+: :+: #
# +:+ +:+ +:+ #
# By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ #
# +#+#+#+#+#+ +#+ #
# Created: 2020/06/16 21:48:50 by charles #+# #+# #
# Updated: 2021/03/01 16:02:35 by cacharle ### ########.fr #
# #
# ############################################################################ #
import os
import re
import sys
import subprocess
from pathlib import Path
from typing import Optional, List, Dict, Union, Callable
from minishell_test.config import Config
from minishell_test.test.captured import Captured
from minishell_test.test.result import Result, LeakResult
from minishell_test import sandbox
HookType = Union[Callable[[str], str], List[Callable[[str], str]]]
HookStatusType = Union[Callable[[int], int], List[Callable[[int], int]]]
class Test:
def __init__(
self,
cmd: str,
setup: str = "",
files: List[str] = [],
exports: Dict[str, str] = {},
timeout: float = -1,
hook: HookType = [],
hook_status: HookStatusType = [],
):
""" Test class
cmd: command to execute
setup: command to execute before tested command
files: files to watch (check content after test)
exports: exported variables
timeout: maximum amount of time taken by the test
hook: function to execute on the output of the test
hook_status: function to execute on status code
"""
self.cmd = cmd
self.setup = setup
self.files = files
self.exports = exports
self.result: Optional[Union[Result, LeakResult]] = None
self.timeout = timeout if timeout > 0 else Config.timeout_test
if not isinstance(hook, list):
hook = [hook]
if not isinstance(hook_status, list):
hook_status = [hook_status]
self.hook = hook
self.hook_status = hook_status
def run(self, index: int) -> None:
""" Run the test for minishell and the reference shell and print the result out """
if Config.check_leaks:
self.hook = []
self.hook_status = []
captured = self._run_sandboxed([*Config.valgrind_cmd, "-c"])
self.result = LeakResult(self.full_cmd, captured)
self.result.put(index)
return
expected = self._run_sandboxed([Config.shell_reference_path, *Config.shell_reference_args, "-c"])
actual = self._run_sandboxed([Config.minishell_exec_path, "-c"])
self.result = Result(self.full_cmd, self.files, expected, actual)
self.result.put(index)
def _run_sandboxed(self, shell_cmd: List[Union[str, Path]]) -> Captured:
""" Run the command in a sandbox environment """
with sandbox.context():
if self.setup != "":
try:
subprocess.run(
self.setup,
shell=True,
cwd=Config.sandbox_dir,
stderr=subprocess.STDOUT,
stdout=subprocess.PIPE,
check=True
)
except subprocess.CalledProcessError as e:
print("Error: `{}` setup command failed for `{}`\n\twith '{}'"
.format(self.setup,
self.cmd,
"no stderr" if e.stdout is None
else e.stdout.decode().strip()))
sys.exit(1)
return self._run_capture(shell_cmd)
def _run_capture(self, shell_cmd: List[Union[str, Path]]) -> Captured:
""" Capture the output (stdout and stderr)
Capture the content of the watched files after the command is run
"""
# run the command in the sandbox
process = subprocess.Popen(
[*shell_cmd, self.cmd],
stderr=subprocess.STDOUT,
stdout=subprocess.PIPE,
cwd=Config.sandbox_dir,
env={
'PATH': Config.shell_path_variable,
'TERM': 'xterm-256color',
**self.exports,
},
)
# https://docs.python.org/3/library/subprocess.html#subprocess.Popen.communicate
try:
stdout, _ = process.communicate(
timeout=(self.timeout if not Config.check_leaks else Config.timeout_leaks))
except subprocess.TimeoutExpired:
process.kill()
# _, _ = process.communicate(timeout=2)
return Captured.timeout()
try:
output = stdout.decode()
except UnicodeDecodeError:
output = "UNICODE ERROR: {}".format(process.stdout)
# capture watched files content
files_content: List[Optional[str]] = []
for file_name in self.files:
try:
with open(os.path.join(Config.sandbox_dir, file_name), "rb") as f:
files_content.append(f.read().decode())
except FileNotFoundError:
files_content.append(None)
# apply output/status hooks
for hook in self.hook:
output = hook(output)
for hook_status in self.hook_status:
process.returncode = hook_status(process.returncode)
# replace reference prefix with minishell prefix
lines = output.split('\n')
for i, line in enumerate(lines):
lines[i] = line = re.sub("line [01]: ", "", lines[i], 1)
if line.startswith(Config.shell_reference_prefix):
lines[i] = Config.minishell_prefix + line[len(Config.shell_reference_prefix):]
output = '\n'.join(lines)
return Captured(output, process.returncode, files_content)
@property
def full_cmd(self) -> str:
""" Return the command prefixed by the setup and exports """
s = self.cmd
if len(self.exports) != 0:
s = "[EXPORTS {}] {}".format(
' '.join(["{}='{}'".format(k, v) for k, v in self.exports.items()]), s)
if self.setup != "":
s = "[SETUP {}] {}".format(self.setup, s)
return s
@classmethod
def try_run(cls, cmd: str) -> str:
test = Test(cmd)
test.run(0)
if isinstance(test.result, LeakResult):
return test.result.captured.output
elif isinstance(test.result, Result):
return test.result.actual.output
else:
return "No output"
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