test_loader.py
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	# Copyright (C) 2018-2020 The Software Heritage developers
	# See the AUTHORS file at the top-level directory of this distribution
	# License: GNU General Public License version 3, or any later version
	# See top-level LICENSE file for more information

	import datetime
	import hashlib
	import logging

	from swh.model.model import Origin, OriginVisit, Snapshot

	from swh.loader.core.loader import BaseLoader, DVCSLoader
	from swh.loader.tests.common import assert_last_visit_matches


	ORIGIN = Origin(url="some-url")


	class DummyLoader:
	def cleanup(self):
	pass

	def prepare(self, args, *kwargs):
	pass

	def fetch_data(self):
	pass

	def get_snapshot_id(self):
	return None

	def prepare_origin_visit(self, args, *kwargs):
	self.origin = ORIGIN
	self.origin_url = ORIGIN.url
	self.visit_date = datetime.datetime.now(tz=datetime.timezone.utc)
	self.visit_type = "git"
	origin_url = self.storage.origin_add_one(ORIGIN)
	visit = OriginVisit(
	origin=origin_url, date=self.visit_date, type=self.visit_type,
	)
	self.visit = self.storage.origin_visit_add([visit])[0]


	class DummyDVCSLoader(DummyLoader, DVCSLoader):
	"""Unbuffered loader will send directly to storage new data

	"""

	def parse_config_file(self, args, *kwargs):
	return {
	"max_content_size": 100 * 1024 * 1024,
	"storage": {
	"cls": "pipeline",
	"steps": [{"cls": "retry",}, {"cls": "filter",}, {"cls": "memory",},],
	},
	}

	def get_contents(self):
	return []

	def get_directories(self):
	return []

	def get_revisions(self):
	return []

	def get_releases(self):
	return []

	def get_snapshot(self):
	return Snapshot(branches={})

	def eventful(self):
	return False


	class DummyBaseLoader(DummyLoader, BaseLoader):
	"""Buffered loader will send new data when threshold is reached

	"""

	def parse_config_file(self, args, *kwargs):
	return {
	"max_content_size": 100 * 1024 * 1024,
	"storage": {
	"cls": "pipeline",
	"steps": [
	{"cls": "retry",},
	{"cls": "filter",},
	{
	"cls": "buffer",
	"min_batch_size": {
	"content": 2,
	"content_bytes": 8,
	"directory": 2,
	"revision": 2,
	"release": 2,
	},
	},
	{"cls": "memory",},
	],
	},
	}

	def store_data(self):
	pass


	def test_base_loader():
	loader = DummyBaseLoader()
	result = loader.load()

	assert result == {"status": "eventful"}


	def test_dvcs_loader():
	loader = DummyDVCSLoader()
	result = loader.load()
	assert result == {"status": "eventful"}


	def test_loader_logger_default_name():
	loader = DummyBaseLoader()
	assert isinstance(loader.log, logging.Logger)
	assert loader.log.name == "swh.loader.core.tests.test_loader.DummyBaseLoader"

	loader = DummyDVCSLoader()
	assert isinstance(loader.log, logging.Logger)
	assert loader.log.name == "swh.loader.core.tests.test_loader.DummyDVCSLoader"


	def test_loader_logger_with_name():
	loader = DummyBaseLoader("some.logger.name")
	assert isinstance(loader.log, logging.Logger)
	assert loader.log.name == "some.logger.name"


	def test_loader_save_data_path(tmp_path):
	loader = DummyBaseLoader("some.logger.name.1")
	url = "http://bitbucket.org/something"
	loader.origin = Origin(url=url)
	loader.visit_date = datetime.datetime(year=2019, month=10, day=1)
	loader.config = {
	"save_data_path": tmp_path,
	}

	hash_url = hashlib.sha1(url.encode("utf-8")).hexdigest()
	expected_save_path = "%s/sha1:%s/%s/2019" % (str(tmp_path), hash_url[0:2], hash_url)

	save_path = loader.get_save_data_path()
	assert save_path == expected_save_path


	def _check_load_failure(caplog, loader, exc_class, exc_text):
	"""Check whether a failed load properly logged its exception, and that the
	snapshot didn't get referenced in storage"""
	for record in caplog.records:
	if record.levelname != "ERROR":
	continue
	assert "Loading failure" in record.message
	assert record.exc_info
	exc = record.exc_info[1]
	assert isinstance(exc, exc_class)
	assert exc_text in exc.args[0]

	# Check that the get_snapshot operation would have succeeded
	assert loader.get_snapshot() is not None

	# But that the snapshot didn't get loaded
	assert loader.loaded_snapshot_id is None

	# And confirm that the visit doesn't reference a snapshot
	visit = assert_last_visit_matches(loader.storage, ORIGIN.url, status="partial")
	assert visit.snapshot is None


	class DummyDVCSLoaderExc(DummyDVCSLoader):
	"""A loader which raises an exception when loading some contents"""

	def get_contents(self):
	raise RuntimeError("Failed to get contents!")


	def test_dvcs_loader_exc_partial_visit(caplog):
	logger_name = "dvcsloaderexc"
	caplog.set_level(logging.ERROR, logger=logger_name)

	loader = DummyDVCSLoaderExc(logging_class=logger_name)
	result = loader.load()

	assert result == {"status": "failed"}

	_check_load_failure(caplog, loader, RuntimeError, "Failed to get contents!")


	class BrokenStorageProxy:
	def __init__(self, storage):
	self.storage = storage

	def __getattr__(self, attr):
	return getattr(self.storage, attr)

	def snapshot_add(self, snapshots):
	raise RuntimeError("Failed to add snapshot!")


	class DummyDVCSLoaderStorageExc(DummyDVCSLoader):
	"""A loader which raises an exception when loading some contents"""

	def __init__(self, args, *kwargs):
	super().__init__(args, *kwargs)
	self.storage = BrokenStorageProxy(self.storage)


	def test_dvcs_loader_storage_exc_partial_visit(caplog):
	logger_name = "dvcsloaderexc"
	caplog.set_level(logging.ERROR, logger=logger_name)

	loader = DummyDVCSLoaderStorageExc(logging_class=logger_name)
	result = loader.load()

	assert result == {"status": "failed"}

	_check_load_failure(caplog, loader, RuntimeError, "Failed to add snapshot!")

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