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"""Test cases for procedures defined in file_utils.py"""
import os
import unittest
from dataclasses import dataclass
from typing import Callable
from unittest import mock
from gn3.file_utils import extract_uploaded_file
from gn3.file_utils import get_dir_hash
from gn3.file_utils import jsonfile_to_dict
from gn3.file_utils import cache_ipfs_file
@dataclass
class MockFile:
"""Mock File object returned by request.files"""
filename: str
save: Callable
class TestFileUtils(unittest.TestCase):
"""Test cases for procedures defined in file_utils.py"""
def test_get_dir_hash(self):
"""Test that a directory is hashed correctly"""
test_dir = os.path.join(os.path.dirname(__file__), "test_data")
self.assertEqual("3aeafab7d53b4f76d223366ae7ee9738",
get_dir_hash(test_dir))
def test_get_dir_hash_non_existent_dir(self):
"""Test thata an error is raised when the dir does not exist"""
self.assertRaises(FileNotFoundError, get_dir_hash,
"/non-existent-file")
def test_jsonfile_to_dict(self):
"""Test that a json file is parsed correctly""" ""
json_file = os.path.join(os.path.dirname(__file__), "test_data",
"metadata.json")
self.assertEqual("Longer description",
jsonfile_to_dict(json_file).get("description"))
def test_jsonfile_to_dict_nonexistent_file(self):
"""Test that a ValueError is raised when the json file is
non-existent"""
self.assertRaises(FileNotFoundError, jsonfile_to_dict,
"/non-existent-dir")
@mock.patch("gn3.file_utils.tarfile")
@mock.patch("gn3.file_utils.secure_filename")
def test_extract_uploaded_file(self, mock_file, mock_tarfile):
"""Test that the gzip file is extracted to the right location"""
mock_file.return_value = "upload-data.tar.gz"
mock_fileobj = MockFile(save=mock.MagicMock(),
filename="upload-data.tar.gz")
mock_tarfile.return_value = mock.Mock()
result = extract_uploaded_file(mock_fileobj,
"/tmp",
token="abcdef-abcdef")
mock_fileobj.save.assert_called_once_with("/tmp/abcdef-abcdef/"
"upload-data.tar.gz")
mock_tarfile.open.assert_called_once_with("/tmp/abcdef-abcdef/"
"upload-data.tar.gz")
mock_tarfile.open.return_value.extractall.assert_called_once_with(
path='/tmp/abcdef-abcdef')
mock_file.assert_called_once_with("upload-data.tar.gz")
self.assertEqual(result, {"status": 0, "token": "abcdef-abcdef"})
@mock.patch("gn3.file_utils.secure_filename")
def test_extract_uploaded_file_non_existent_gzip(self, mock_file):
"""Test that the right error message is returned when there is a problem
extracting the file"""
mock_file.return_value = os.path.join(os.path.dirname(__file__),
"CTtyodSTh5") # Does not exist!
mock_fileobj = MockFile(save=mock.MagicMock(), filename="")
result = extract_uploaded_file(mock_fileobj, "/tmp")
self.assertEqual(result, {
"status": 128,
"error": "gzip failed to unpack file"
})
def test_cache_ipfs_file_cache_hit(self):
"""Test that the correct file location is returned if there's a cache hit"""
# Create empty file
test_dir = "/tmp/QmQPeNsJPyVWPFDVHb77w8G42Fvo15z4bG2X8D2GhfbSXc-test"
if not os.path.exists(test_dir):
os.mkdir(test_dir)
open(f"{test_dir}/genotype.txt", "a").close()
file_loc = cache_ipfs_file(
ipfs_file=("/ipfs/"
"QmQPeNsJPyVWPFDVHb"
"77w8G42Fvo15z4bG2X8D2GhfbSXc-test/"
"genotype.txt"),
cache_dir="/tmp")
# Clean up
os.remove(f"{test_dir}/genotype.txt")
os.rmdir(test_dir)
self.assertEqual(file_loc, f"{test_dir}/genotype.txt")
@mock.patch("gn3.file_utils.ipfshttpclient")
def test_cache_ipfs_file_cache_miss(self,
mock_ipfs):
"""Test that a file is cached if there's a cache miss"""
mock_ipfs_client = mock.MagicMock()
mock_ipfs.connect.return_value = mock_ipfs_client
test_dir = "/tmp/QmQPeNsJPyVWPFDVHb77w8G42Fvo15z4bG2X8D2GhfbSXc-test"
self.assertEqual(cache_ipfs_file(
ipfs_file=("/ipfs/"
"QmQPeNsJPyVWPFDVHb"
"77w8G42Fvo15z4bG2X8D2GhfbSXc-test/"
"genotype.txt"),
cache_dir="/tmp"
), f"{test_dir}/genotype.txt")
mock_ipfs_client.get.assert_called_once_with(
("/ipfs/"
"QmQPeNsJPyVWPFDVHb"
"77w8G42Fvo15z4bG2X8D2GhfbSXc-test/"
"genotype.txt"),
target=f"{test_dir}"
)
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