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"""Common TestCase used for testing llvm.py subcommands."""
import shutil
import os
import subprocess
import unittest
from tempfile import mkdtemp
from uuid import uuid4
from linaropy.cd import cd
# TODO: move this somewhere more public (maybe linaropy?)
def debug(test):
"""
Decorator that dumps the output of any subprocess.CalledProcessError
exception. Use this to decorate a test function when you can't tell what the
problem is.
"""
def wrapper(*args, **kwargs):
# Catch any exceptions so we can dump all the output
try:
self = args[0]
self.maxDiff = None # So we can see large diffs between
# expected/actual
test(*args, **kwargs)
except subprocess.CalledProcessError as exc:
print("Error in {}:".format(test.__name__))
print("Command {} exited with error code {}:\n{}".format(
exc.cmd, exc.returncode, exc.output))
return wrapper
class LLVMTestCase(unittest.TestCase):
python = "python3"
script = os.path.join("scripts", "llvm.py")
@classmethod
def create_dummy_commit(cls, commitMessage="Dummy commit"):
filename = "filethatshouldntexist" + str(uuid4())
cls.run_quietly(["touch", filename])
try:
cls.run_quietly(["git", "add", filename])
cls.run_quietly(["git", "commit", "-m", commitMessage])
except subprocess.CalledProcessError as exc:
print("Command {} exited with error code {}:\n{}".format(
exc.cmd, exc.returncode, exc.output))
@classmethod
def create_dummy_repo(cls, repopath, originpath=None):
if originpath is not None:
cls.run_quietly(["git", "clone", originpath, repopath])
else:
if not os.path.isdir(repopath):
os.makedirs(repopath)
with cd(repopath):
cls.run_quietly(["git", "init"])
with cd(repopath):
cls.create_dummy_commit()
@classmethod
def add_worktree(cls, repopath, worktreepath, branch):
with cd(repopath):
cls.run_quietly(["git", "worktree", "add", worktreepath,
"-b", branch])
@staticmethod
def run_with_output(*args, **kwargs):
"""Helper for running a command and capturing stdout and stderr"""
kwargs["stderr"] = subprocess.STDOUT
return str(subprocess.check_output(*args, **kwargs), 'utf-8')
@staticmethod
def run_quietly(*args, **kwargs):
"""
Helper for running a command and ignoring stdout and stderr. Exceptions
are still thrown if something goes wrong
"""
kwargs["stdout"] = subprocess.DEVNULL
kwargs["stderr"] = subprocess.DEVNULL
return subprocess.check_call(*args, **kwargs)
@classmethod
def command_with_defaults(cls, subcommand, *args, **kwargs):
"""Build a list representing an llvm subcommand with the given args."""
command = [cls.python, cls.script]
command.append(subcommand)
if len(args):
command.extend(args)
return command
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