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# -*- coding: utf-8 -*-
"""
Integration tests for dialect detection.
Author: G.J.J. van den Burg
"""
import argparse
import gzip
import json
import multiprocessing
import os
import time
import warnings
import chardet
import termcolor
import clevercsv
THIS_DIR = os.path.abspath(os.path.dirname(__file__))
SOURCE_DIR = os.path.join(THIS_DIR, "data")
TEST_FILES = os.path.join(SOURCE_DIR, "files")
TEST_DIALECTS = os.path.join(SOURCE_DIR, "dialects")
LOG_SUCCESS = os.path.join(THIS_DIR, "success.log")
LOG_ERROR = os.path.join(THIS_DIR, "error.log")
LOG_FAILED = os.path.join(THIS_DIR, "failed.log")
LOG_METHOD = os.path.join(THIS_DIR, "method.log")
LOG_RUNTIME = os.path.join(THIS_DIR, "runtime.log")
LOG_SUCCESS_PARTIAL = os.path.join(THIS_DIR, "success_partial.log")
LOG_ERROR_PARTIAL = os.path.join(THIS_DIR, "error_partial.log")
LOG_FAILED_PARTIAL = os.path.join(THIS_DIR, "failed_partial.log")
LOG_METHOD_PARTIAL = os.path.join(THIS_DIR, "method_partial.log")
LOG_RUNTIME_PARTIAL = os.path.join(THIS_DIR, "runtime_partial.log")
TIMEOUT = 5 * 60
N_BYTES_PARTIAL = 10000
def log_result(name, kind, verbose, partial):
table = {
"error": (LOG_ERROR, LOG_ERROR_PARTIAL, "yellow"),
"success": (LOG_SUCCESS, LOG_SUCCESS_PARTIAL, "green"),
"failure": (LOG_FAILED, LOG_FAILED_PARTIAL, "red"),
}
outfull, outpartial, color = table.get(kind)
fname = outpartial if partial else outfull
with open(fname, "a") as fp:
fp.write(name + "\n")
if verbose:
termcolor.cprint(name, color=color)
def log_method(name, method, partial):
fname = LOG_METHOD_PARTIAL if partial else LOG_METHOD
with open(fname, "a") as fp:
fp.write(f"{name},{method}\n")
def log_runtime(name, runtime, partial):
fname = LOG_RUNTIME_PARTIAL if partial else LOG_RUNTIME
with open(fname, "a") as fp:
fp.write(f"{name},{runtime}\n")
def worker(args, return_dict, **kwargs):
det = clevercsv.Detector()
filename, encoding, partial = args
return_dict["error"] = False
return_dict["dialect"] = None
return_dict["method"] = None
return_dict["runtime"] = float("nan")
with gzip.open(filename, "rt", newline="", encoding=encoding) as fp:
data = fp.read(N_BYTES_PARTIAL) if partial else fp.read()
try:
t = time.time()
return_dict["dialect"] = det.detect(data, **kwargs)
return_dict["runtime"] = time.time() - t
return_dict["method"] = det.method_
except clevercsv.Error:
return_dict["error"] = True
def run_with_timeout(args, kwargs, limit):
manager = multiprocessing.Manager()
return_dict = manager.dict()
p = multiprocessing.Process(
target=worker, args=(args, return_dict), kwargs=kwargs
)
p.start()
p.join(limit)
if p.is_alive():
p.terminate()
return None, True, None, float("nan")
return (
return_dict["dialect"],
return_dict["error"],
return_dict["method"],
return_dict["runtime"],
)
def run_test(name, gz_filename, annotation, verbose=1, partial=False):
if "encoding" in annotation:
enc = annotation["encoding"]
else:
with gzip.open(gz_filename, "rb") as fid:
enc = chardet.detect(fid.read())["encoding"]
true_dialect = annotation["dialect"]
dialect, error, method, runtime = run_with_timeout(
(gz_filename, enc, partial), {"verbose": verbose > 1}, TIMEOUT
)
if error:
return log_result(name, "error", verbose, partial)
if dialect is None:
log_result(name, "failure", verbose, partial)
elif dialect.delimiter != true_dialect["delimiter"]:
log_result(name, "failure", verbose, partial)
elif dialect.quotechar != true_dialect["quotechar"]:
log_result(name, "failure", verbose, partial)
elif dialect.escapechar != true_dialect["escapechar"]:
log_result(name, "failure", verbose, partial)
else:
log_result(name, "success", verbose, partial)
log_method(name, method, partial)
log_runtime(name, runtime, partial)
def load_test_cases():
cases = []
for f in sorted(os.listdir(TEST_FILES)):
base = f[: -len(".csv.gz")]
dialect_file = os.path.join(TEST_DIALECTS, base + ".json")
if not os.path.exists(dialect_file):
continue
filename = os.path.join(TEST_FILES, f)
with open(dialect_file, "r") as fid:
annotation = json.load(fid)
if not annotation["filename"] == f[: -len(".gz")]:
warnings.warn(
"filename doesn't match! Input file: %s\nDialect file: %s"
% (filename, dialect_file)
)
continue
if annotation["status"] == "skip":
continue
cases.append((base, filename, annotation))
return cases
def clear_output_files(partial):
files = {
True: [
LOG_SUCCESS_PARTIAL,
LOG_FAILED_PARTIAL,
LOG_ERROR_PARTIAL,
LOG_METHOD_PARTIAL,
LOG_RUNTIME_PARTIAL,
],
False: [LOG_SUCCESS, LOG_FAILED, LOG_ERROR, LOG_METHOD, LOG_RUNTIME],
}
delete = lambda f: os.unlink(f) if os.path.exists(f) else None
any(map(delete, files[partial]))
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument(
"--partial",
help="Run test with partial file data",
action="store_true",
)
parser.add_argument("-v", "--verbose", help="Be verbose", action="count")
return parser.parse_args()
def main():
args = parse_args()
clear_output_files(args.partial)
cases = load_test_cases()
for name, gz_filename, annotation in cases:
run_test(
name,
gz_filename,
annotation,
verbose=args.verbose,
partial=args.partial,
)
if __name__ == "__main__":
main()
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