openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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#!/usr/bin/env python3
import os
import unittest
from openpilot.tools.lib.url_file import URLFile
from tools.lib.tests import temporary_cache_dir
class TestFileDownload(unittest.TestCase):
def compare_loads(self, url, start=0, length=None):
"""Compares range between cached and non cached version"""
file_cached = URLFile(url, cache=True)
file_downloaded = URLFile(url, cache=False)
file_cached.seek(start)
file_downloaded.seek(start)
self.assertEqual(file_cached.get_length(), file_downloaded.get_length())
self.assertLessEqual(length + start if length is not None else 0, file_downloaded.get_length())
response_cached = file_cached.read(ll=length)
response_downloaded = file_downloaded.read(ll=length)
self.assertEqual(response_cached, response_downloaded)
# Now test with cache in place
file_cached = URLFile(url, cache=True)
file_cached.seek(start)
response_cached = file_cached.read(ll=length)
self.assertEqual(file_cached.get_length(), file_downloaded.get_length())
self.assertEqual(response_cached, response_downloaded)
@temporary_cache_dir
def test_small_file(self):
# Make sure we don't force cache
os.environ["FILEREADER_CACHE"] = "0"
small_file_url = "https://raw.githubusercontent.com/commaai/openpilot/master/docs/SAFETY.md"
# If you want large file to be larger than a chunk
# large_file_url = "https://commadataci.blob.core.windows.net/openpilotci/0375fdf7b1ce594d/2019-06-13--08-32-25/3/fcamera.hevc"
# Load full small file
self.compare_loads(small_file_url)
file_small = URLFile(small_file_url)
length = file_small.get_length()
self.compare_loads(small_file_url, length - 100, 100)
self.compare_loads(small_file_url, 50, 100)
# Load small file 100 bytes at a time
for i in range(length // 100):
self.compare_loads(small_file_url, 100 * i, 100)
@temporary_cache_dir
def test_large_file(self):
large_file_url = "https://commadataci.blob.core.windows.net/openpilotci/0375fdf7b1ce594d/2019-06-13--08-32-25/3/qlog.bz2"
# Load the end 100 bytes of both files
file_large = URLFile(large_file_url)
length = file_large.get_length()
self.compare_loads(large_file_url, length - 100, 100)
self.compare_loads(large_file_url)
if __name__ == "__main__":
unittest.main()