test_scheduler.py
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test_scheduler.py
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	# Copyright (C) 2017-2021 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

	from collections import defaultdict
	import copy
	import datetime
	from datetime import timedelta
	import inspect
	import random
	from typing import Any, Dict, List, Optional, Tuple
	import uuid

	import attr
	from psycopg2.extras import execute_values
	import pytest

	from swh.model.hashutil import hash_to_bytes
	from swh.scheduler.exc import SchedulerException, StaleData, UnknownPolicy
	from swh.scheduler.interface import ListedOriginPageToken, SchedulerInterface
	from swh.scheduler.model import (
	LastVisitStatus,
	ListedOrigin,
	OriginVisitStats,
	SchedulerMetrics,
	)
	from swh.scheduler.utils import utcnow

	from .common import (
	LISTERS,
	TASK_TYPES,
	TEMPLATES,
	tasks_from_template,
	tasks_with_priority_from_template,
	)

	ONEDAY = timedelta(days=1)

	NUM_PRIORITY_TASKS = {None: 100, "high": 60, "normal": 30, "low": 20}


	def subdict(d, keys=None, excl=()):
	if keys is None:
	keys = [k for k in d.keys()]
	return {k: d[k] for k in keys if k not in excl}


	def metrics_sort_key(m: SchedulerMetrics) -> Tuple[uuid.UUID, str]:
	return (m.lister_id, m.visit_type)


	def assert_metrics_equal(left, right):
	assert sorted(left, key=metrics_sort_key) == sorted(right, key=metrics_sort_key)


	class TestScheduler:
	def test_interface(self, swh_scheduler):
	"""Checks all methods of SchedulerInterface are implemented by this
	backend, and that they have the same signature."""
	# Create an instance of the protocol (which cannot be instantiated
	# directly, so this creates a subclass, then instantiates it)
	interface = type("_", (SchedulerInterface,), {})()

	assert "create_task_type" in dir(interface)

	missing_methods = []

	for meth_name in dir(interface):
	if meth_name.startswith("_"):
	continue
	interface_meth = getattr(interface, meth_name)
	try:
	concrete_meth = getattr(swh_scheduler, meth_name)
	except AttributeError:
	if not getattr(interface_meth, "deprecated_endpoint", False):
	# The backend is missing a (non-deprecated) endpoint
	missing_methods.append(meth_name)
	continue

	expected_signature = inspect.signature(interface_meth)
	actual_signature = inspect.signature(concrete_meth)

	assert expected_signature == actual_signature, meth_name

	assert missing_methods == []

	def test_add_task_type(self, swh_scheduler):
	tt = TASK_TYPES["git"]
	swh_scheduler.create_task_type(tt)
	assert tt == swh_scheduler.get_task_type(tt["type"])
	tt2 = TASK_TYPES["hg"]
	swh_scheduler.create_task_type(tt2)
	assert tt == swh_scheduler.get_task_type(tt["type"])
	assert tt2 == swh_scheduler.get_task_type(tt2["type"])

	def test_create_task_type_idempotence(self, swh_scheduler):
	tt = TASK_TYPES["git"]
	swh_scheduler.create_task_type(tt)
	swh_scheduler.create_task_type(tt)
	assert tt == swh_scheduler.get_task_type(tt["type"])

	def test_get_task_types(self, swh_scheduler):
	tt, tt2 = TASK_TYPES["git"], TASK_TYPES["hg"]
	swh_scheduler.create_task_type(tt)
	swh_scheduler.create_task_type(tt2)
	actual_task_types = swh_scheduler.get_task_types()
	assert tt in actual_task_types
	assert tt2 in actual_task_types

	def test_create_tasks(self, swh_scheduler):
	self._create_task_types(swh_scheduler)
	num_git = 100
	tasks_1 = tasks_from_template(TEMPLATES["git"], utcnow(), num_git)
	tasks_2 = tasks_from_template(
	TEMPLATES["hg"], utcnow(), num_priorities=NUM_PRIORITY_TASKS
	)
	tasks = tasks_1 + tasks_2

	# tasks are returned only once with their ids
	ret1 = swh_scheduler.create_tasks(tasks + tasks)
	set_ret1 = set([t["id"] for t in ret1])

	# creating the same set result in the same ids
	ret = swh_scheduler.create_tasks(tasks)
	set_ret = set([t["id"] for t in ret])

	# Idempotence results
	assert set_ret == set_ret1
	assert len(ret) == len(ret1)

	ids = set()
	actual_priorities = defaultdict(int)

	for task, orig_task in zip(ret, tasks):
	task = copy.deepcopy(task)
	task_type = TASK_TYPES[orig_task["type"].split("-")[-1]]
	assert task["id"] not in ids
	assert task["status"] == "next_run_not_scheduled"
	assert task["current_interval"] == task_type["default_interval"]
	assert task["policy"] == orig_task.get("policy", "recurring")
	priority = task.get("priority")
	actual_priorities[priority] += 1

	assert task["retries_left"] == (task_type["num_retries"] or 0)
	ids.add(task["id"])
	del task["id"]
	del task["status"]
	del task["current_interval"]
	del task["retries_left"]
	if "policy" not in orig_task:
	del task["policy"]
	if "priority" not in orig_task:
	del task["priority"]
	assert task == orig_task

	expected_priorities = NUM_PRIORITY_TASKS.copy()
	expected_priorities[None] += num_git
	assert dict(actual_priorities) == expected_priorities

	def test_peek_ready_tasks_no_priority(self, swh_scheduler):
	self._create_task_types(swh_scheduler)
	t = utcnow()
	task_type = TEMPLATES["git"]["type"]
	tasks = tasks_from_template(TEMPLATES["git"], t, 100)
	random.shuffle(tasks)
	swh_scheduler.create_tasks(tasks)

	ready_tasks = swh_scheduler.peek_ready_tasks(task_type)
	assert len(ready_tasks) == len(tasks)
	for i in range(len(ready_tasks) - 1):
	assert ready_tasks[i]["next_run"] <= ready_tasks[i + 1]["next_run"]

	# Only get the first few ready tasks
	limit = random.randrange(5, 5 + len(tasks) // 2)
	ready_tasks_limited = swh_scheduler.peek_ready_tasks(task_type, num_tasks=limit)

	assert len(ready_tasks_limited) == limit
	assert ready_tasks_limited == ready_tasks[:limit]

	# Limit by timestamp
	max_ts = tasks[limit - 1]["next_run"]
	ready_tasks_timestamped = swh_scheduler.peek_ready_tasks(
	task_type, timestamp=max_ts
	)

	for ready_task in ready_tasks_timestamped:
	assert ready_task["next_run"] <= max_ts

	# Make sure we get proper behavior for the first ready tasks
	assert ready_tasks[: len(ready_tasks_timestamped)] == ready_tasks_timestamped

	# Limit by both
	ready_tasks_both = swh_scheduler.peek_ready_tasks(
	task_type, timestamp=max_ts, num_tasks=limit // 3
	)
	assert len(ready_tasks_both) <= limit // 3
	for ready_task in ready_tasks_both:
	assert ready_task["next_run"] <= max_ts
	assert ready_task in ready_tasks[: limit // 3]

	def test_peek_ready_tasks_returns_only_no_priority_tasks(self, swh_scheduler):
	"""Peek ready tasks only return standard tasks (no priority)"""
	self._create_task_types(swh_scheduler)
	t = utcnow()
	task_type = TEMPLATES["git"]["type"]
	# Create tasks with and without priorities
	tasks = tasks_from_template(
	TEMPLATES["git"], t, num_priorities=NUM_PRIORITY_TASKS,
	)

	count_priority = 0
	for task in tasks:
	count_priority += 0 if task.get("priority") is None else 1

	assert count_priority > 0, "Some created tasks should have some priority"

	random.shuffle(tasks)
	swh_scheduler.create_tasks(tasks)

	# take all available no priority tasks
	ready_tasks = swh_scheduler.peek_ready_tasks(task_type)

	assert len(ready_tasks) == len(tasks) - count_priority

	# No read task should have any priority
	for task in ready_tasks:
	assert task.get("priority") is None

	def test_grab_ready_tasks(self, swh_scheduler):
	self._create_task_types(swh_scheduler)
	t = utcnow()
	task_type = TEMPLATES["git"]["type"]
	# Create tasks with and without priorities
	tasks = tasks_from_template(
	TEMPLATES["git"], t, num_priorities=NUM_PRIORITY_TASKS
	)
	random.shuffle(tasks)
	swh_scheduler.create_tasks(tasks)

	first_ready_tasks = swh_scheduler.peek_ready_tasks(task_type, num_tasks=50)
	grabbed_tasks = swh_scheduler.grab_ready_tasks(task_type, num_tasks=50)
	first_ready_tasks.sort(key=lambda task: task["arguments"]["args"][0])
	grabbed_tasks.sort(key=lambda task: task["arguments"]["args"][0])

	for peeked, grabbed in zip(first_ready_tasks, grabbed_tasks):
	assert peeked["status"] == "next_run_not_scheduled"
	del peeked["status"]
	assert grabbed["status"] == "next_run_scheduled"
	del grabbed["status"]
	assert peeked == grabbed
	priority = grabbed["priority"]
	assert priority == peeked["priority"]
	assert priority is None

	def test_grab_ready_priority_tasks(self, swh_scheduler):
	"""check the grab and peek priority tasks endpoint behave as expected"""
	self._create_task_types(swh_scheduler)
	t = utcnow()
	task_type = TEMPLATES["git"]["type"]
	num_tasks = 100
	# Create tasks with and without priorities
	tasks0 = tasks_with_priority_from_template(
	TEMPLATES["git"], t, num_tasks, "high",
	)
	tasks1 = tasks_with_priority_from_template(
	TEMPLATES["hg"], t, num_tasks, "low",
	)
	tasks2 = tasks_with_priority_from_template(
	TEMPLATES["hg"], t, num_tasks, "normal",
	)
	tasks = tasks0 + tasks1 + tasks2

	random.shuffle(tasks)
	swh_scheduler.create_tasks(tasks)

	ready_tasks = swh_scheduler.peek_ready_priority_tasks(task_type, num_tasks=50)
	grabbed_tasks = swh_scheduler.grab_ready_priority_tasks(task_type, num_tasks=50)
	ready_tasks.sort(key=lambda task: task["arguments"]["args"][0])
	grabbed_tasks.sort(key=lambda task: task["arguments"]["args"][0])

	for peeked, grabbed in zip(ready_tasks, grabbed_tasks):
	assert peeked["status"] == "next_run_not_scheduled"
	del peeked["status"]
	assert grabbed["status"] == "next_run_scheduled"
	del grabbed["status"]
	assert peeked == grabbed
	assert peeked["priority"] == grabbed["priority"]
	assert peeked["priority"] is not None

	def test_get_tasks(self, swh_scheduler):
	self._create_task_types(swh_scheduler)
	t = utcnow()
	tasks = tasks_from_template(TEMPLATES["git"], t, 100)
	tasks = swh_scheduler.create_tasks(tasks)
	random.shuffle(tasks)
	while len(tasks) > 1:
	length = random.randrange(1, len(tasks))
	cur_tasks = sorted(tasks[:length], key=lambda x: x["id"])
	tasks[:length] = []

	ret = swh_scheduler.get_tasks(task["id"] for task in cur_tasks)
	# result is not guaranteed to be sorted
	ret.sort(key=lambda x: x["id"])
	assert ret == cur_tasks

	def test_search_tasks(self, swh_scheduler):
	def make_real_dicts(lst):
	"""RealDictRow is not a real dict."""
	return [dict(d.items()) for d in lst]

	self._create_task_types(swh_scheduler)
	t = utcnow()
	tasks = tasks_from_template(TEMPLATES["git"], t, 100)
	tasks = swh_scheduler.create_tasks(tasks)
	assert make_real_dicts(swh_scheduler.search_tasks()) == make_real_dicts(tasks)

	def assert_filtered_task_ok(
	self, task: Dict[str, Any], after: datetime.datetime, before: datetime.datetime
	) -> None:
	"""Ensure filtered tasks have the right expected properties
	(within the range, recurring disabled, etc..)

	"""
	started = task["started"]
	date = started if started is not None else task["scheduled"]
	assert after <= date and date <= before
	if task["task_policy"] == "oneshot":
	assert task["task_status"] in ["completed", "disabled"]
	if task["task_policy"] == "recurring":
	assert task["task_status"] in ["disabled"]

	def test_filter_task_to_archive(self, swh_scheduler):
	"""Filtering only list disabled recurring or completed oneshot tasks

	"""
	self._create_task_types(swh_scheduler)
	_time = utcnow()
	recurring = tasks_from_template(TEMPLATES["git"], _time, 12)
	oneshots = tasks_from_template(TEMPLATES["hg"], _time, 12)
	total_tasks = len(recurring) + len(oneshots)

	# simulate scheduling tasks
	pending_tasks = swh_scheduler.create_tasks(recurring + oneshots)
	backend_tasks = [
	{
	"task": task["id"],
	"backend_id": str(uuid.uuid4()),
	"scheduled": utcnow(),
	}
	for task in pending_tasks
	]
	swh_scheduler.mass_schedule_task_runs(backend_tasks)

	# we simulate the task are being done
	_tasks = []
	for task in backend_tasks:
	t = swh_scheduler.end_task_run(task["backend_id"], status="eventful")
	_tasks.append(t)

	# Randomly update task's status per policy
	status_per_policy = {"recurring": 0, "oneshot": 0}
	status_choice = {
	# policy: [tuple (1-for-filtering, 'associated-status')]
	"recurring": [
	(1, "disabled"),
	(0, "completed"),
	(0, "next_run_not_scheduled"),
	],
	"oneshot": [
	(0, "next_run_not_scheduled"),
	(1, "disabled"),
	(1, "completed"),
	],
	}

	tasks_to_update = defaultdict(list)
	_task_ids = defaultdict(list)
	# randomize 'disabling' recurring task or 'complete' oneshot task
	for task in pending_tasks:
	policy = task["policy"]
	_task_ids[policy].append(task["id"])
	status = random.choice(status_choice[policy])
	if status[0] != 1:
	continue
	# elected for filtering
	status_per_policy[policy] += status[0]
	tasks_to_update[policy].append(task["id"])

	swh_scheduler.disable_tasks(tasks_to_update["recurring"])
	# hack: change the status to something else than completed/disabled
	swh_scheduler.set_status_tasks(
	_task_ids["oneshot"], status="next_run_not_scheduled"
	)
	# complete the tasks to update
	swh_scheduler.set_status_tasks(tasks_to_update["oneshot"], status="completed")

	total_tasks_filtered = (
	status_per_policy["recurring"] + status_per_policy["oneshot"]
	)

	# no pagination scenario

	# retrieve tasks to archive
	after = _time - ONEDAY
	after_ts = after.strftime("%Y-%m-%d")
	before = utcnow() + ONEDAY
	before_ts = before.strftime("%Y-%m-%d")
	tasks_result = swh_scheduler.filter_task_to_archive(
	after_ts=after_ts, before_ts=before_ts, limit=total_tasks
	)

	tasks_to_archive = tasks_result["tasks"]

	assert len(tasks_to_archive) == total_tasks_filtered
	assert tasks_result.get("next_page_token") is None

	actual_filtered_per_status = {"recurring": 0, "oneshot": 0}
	for task in tasks_to_archive:
	self.assert_filtered_task_ok(task, after, before)
	actual_filtered_per_status[task["task_policy"]] += 1

	assert actual_filtered_per_status == status_per_policy

	# pagination scenario

	nb_tasks = 3
	tasks_result = swh_scheduler.filter_task_to_archive(
	after_ts=after_ts, before_ts=before_ts, limit=nb_tasks
	)

	tasks_to_archive2 = tasks_result["tasks"]

	assert len(tasks_to_archive2) == nb_tasks
	next_page_token = tasks_result["next_page_token"]
	assert next_page_token is not None

	all_tasks = tasks_to_archive2
	while next_page_token is not None: # Retrieve paginated results
	tasks_result = swh_scheduler.filter_task_to_archive(
	after_ts=after_ts,
	before_ts=before_ts,
	limit=nb_tasks,
	page_token=next_page_token,
	)
	tasks_to_archive2 = tasks_result["tasks"]
	assert len(tasks_to_archive2) <= nb_tasks
	all_tasks.extend(tasks_to_archive2)
	next_page_token = tasks_result.get("next_page_token")

	actual_filtered_per_status = {"recurring": 0, "oneshot": 0}
	for task in all_tasks:
	self.assert_filtered_task_ok(task, after, before)
	actual_filtered_per_status[task["task_policy"]] += 1

	assert actual_filtered_per_status == status_per_policy

	def test_delete_archived_tasks(self, swh_scheduler):
	self._create_task_types(swh_scheduler)
	_time = utcnow()
	recurring = tasks_from_template(TEMPLATES["git"], _time, 12)
	oneshots = tasks_from_template(TEMPLATES["hg"], _time, 12)
	total_tasks = len(recurring) + len(oneshots)
	pending_tasks = swh_scheduler.create_tasks(recurring + oneshots)
	backend_tasks = [
	{
	"task": task["id"],
	"backend_id": str(uuid.uuid4()),
	"scheduled": utcnow(),
	}
	for task in pending_tasks
	]
	swh_scheduler.mass_schedule_task_runs(backend_tasks)

	_tasks = []
	percent = random.randint(0, 100) # random election removal boundary
	for task in backend_tasks:
	t = swh_scheduler.end_task_run(task["backend_id"], status="eventful")
	c = random.randint(0, 100)
	if c <= percent:
	_tasks.append({"task_id": t["task"], "task_run_id": t["id"]})

	swh_scheduler.delete_archived_tasks(_tasks)

	all_tasks = [task["id"] for task in swh_scheduler.search_tasks()]
	tasks_count = len(all_tasks)
	tasks_run_count = len(swh_scheduler.get_task_runs(all_tasks))

	assert tasks_count == total_tasks - len(_tasks)
	assert tasks_run_count == total_tasks - len(_tasks)

	def test_get_task_runs_no_task(self, swh_scheduler):
	"""No task exist in the scheduler's db, get_task_runs() should always return an
	empty list.

	"""
	assert not swh_scheduler.get_task_runs(task_ids=())
	assert not swh_scheduler.get_task_runs(task_ids=(1, 2, 3))
	assert not swh_scheduler.get_task_runs(task_ids=(1, 2, 3), limit=10)

	def test_get_task_runs_no_task_executed(self, swh_scheduler):
	"""No task has been executed yet, get_task_runs() should always return an empty
	list.

	"""
	self._create_task_types(swh_scheduler)
	_time = utcnow()
	recurring = tasks_from_template(TEMPLATES["git"], _time, 12)
	oneshots = tasks_from_template(TEMPLATES["hg"], _time, 12)
	swh_scheduler.create_tasks(recurring + oneshots)

	assert not swh_scheduler.get_task_runs(task_ids=())
	assert not swh_scheduler.get_task_runs(task_ids=(1, 2, 3))
	assert not swh_scheduler.get_task_runs(task_ids=(1, 2, 3), limit=10)

	def test_get_task_runs_with_scheduled(self, swh_scheduler):
	"""Some tasks have been scheduled but not executed yet, get_task_runs() should
	not return an empty list. limit should behave as expected.

	"""
	self._create_task_types(swh_scheduler)
	_time = utcnow()
	recurring = tasks_from_template(TEMPLATES["git"], _time, 12)
	oneshots = tasks_from_template(TEMPLATES["hg"], _time, 12)
	total_tasks = len(recurring) + len(oneshots)
	pending_tasks = swh_scheduler.create_tasks(recurring + oneshots)
	backend_tasks = [
	{
	"task": task["id"],
	"backend_id": str(uuid.uuid4()),
	"scheduled": utcnow(),
	}
	for task in pending_tasks
	]
	swh_scheduler.mass_schedule_task_runs(backend_tasks)

	assert not swh_scheduler.get_task_runs(task_ids=[total_tasks + 1])

	btask = backend_tasks[0]
	runs = swh_scheduler.get_task_runs(task_ids=[btask["task"]])
	assert len(runs) == 1
	run = runs[0]

	assert subdict(run, excl=("id",)) == {
	"task": btask["task"],
	"backend_id": btask["backend_id"],
	"scheduled": btask["scheduled"],
	"started": None,
	"ended": None,
	"metadata": None,
	"status": "scheduled",
	}

	runs = swh_scheduler.get_task_runs(
	task_ids=[bt["task"] for bt in backend_tasks], limit=2
	)
	assert len(runs) == 2

	runs = swh_scheduler.get_task_runs(
	task_ids=[bt["task"] for bt in backend_tasks]
	)
	assert len(runs) == total_tasks

	keys = ("task", "backend_id", "scheduled")
	assert (
	sorted([subdict(x, keys) for x in runs], key=lambda x: x["task"])
	== backend_tasks
	)

	def test_get_task_runs_with_executed(self, swh_scheduler):
	"""Some tasks have been executed, get_task_runs() should
	not return an empty list. limit should behave as expected.

	"""
	self._create_task_types(swh_scheduler)
	_time = utcnow()
	recurring = tasks_from_template(TEMPLATES["git"], _time, 12)
	oneshots = tasks_from_template(TEMPLATES["hg"], _time, 12)
	pending_tasks = swh_scheduler.create_tasks(recurring + oneshots)
	backend_tasks = [
	{
	"task": task["id"],
	"backend_id": str(uuid.uuid4()),
	"scheduled": utcnow(),
	}
	for task in pending_tasks
	]
	swh_scheduler.mass_schedule_task_runs(backend_tasks)

	btask = backend_tasks[0]
	ts = utcnow()
	swh_scheduler.start_task_run(
	btask["backend_id"], metadata={"something": "stupid"}, timestamp=ts
	)
	runs = swh_scheduler.get_task_runs(task_ids=[btask["task"]])
	assert len(runs) == 1
	assert subdict(runs[0], excl=("id")) == {
	"task": btask["task"],
	"backend_id": btask["backend_id"],
	"scheduled": btask["scheduled"],
	"started": ts,
	"ended": None,
	"metadata": {"something": "stupid"},
	"status": "started",
	}

	ts2 = utcnow()
	swh_scheduler.end_task_run(
	btask["backend_id"],
	metadata={"other": "stuff"},
	timestamp=ts2,
	status="eventful",
	)
	runs = swh_scheduler.get_task_runs(task_ids=[btask["task"]])
	assert len(runs) == 1
	assert subdict(runs[0], excl=("id")) == {
	"task": btask["task"],
	"backend_id": btask["backend_id"],
	"scheduled": btask["scheduled"],
	"started": ts,
	"ended": ts2,
	"metadata": {"something": "stupid", "other": "stuff"},
	"status": "eventful",
	}

	def test_get_or_create_lister(self, swh_scheduler):
	db_listers = []
	for lister_args in LISTERS:
	db_listers.append(swh_scheduler.get_or_create_lister(**lister_args))

	for lister, lister_args in zip(db_listers, LISTERS):
	assert lister.name == lister_args["name"]
	assert lister.instance_name == lister_args.get("instance_name", "")

	lister_get_again = swh_scheduler.get_or_create_lister(
	lister.name, lister.instance_name
	)

	assert lister == lister_get_again

	def test_get_lister(self, swh_scheduler):
	for lister_args in LISTERS:
	assert swh_scheduler.get_lister(**lister_args) is None

	db_listers = []
	for lister_args in LISTERS:
	db_listers.append(swh_scheduler.get_or_create_lister(**lister_args))

	for lister, lister_args in zip(db_listers, LISTERS):
	lister_get_again = swh_scheduler.get_lister(
	lister.name, lister.instance_name
	)

	assert lister == lister_get_again

	def test_get_listers(self, swh_scheduler):
	assert swh_scheduler.get_listers() == []

	db_listers = []
	for lister_args in LISTERS:
	db_listers.append(swh_scheduler.get_or_create_lister(**lister_args))

	assert swh_scheduler.get_listers() == db_listers

	def test_update_lister(self, swh_scheduler, stored_lister):
	lister = attr.evolve(stored_lister, current_state={"updated": "now"})

	updated_lister = swh_scheduler.update_lister(lister)

	assert updated_lister.updated > lister.updated
	assert updated_lister == attr.evolve(lister, updated=updated_lister.updated)

	def test_update_lister_stale(self, swh_scheduler, stored_lister):
	swh_scheduler.update_lister(stored_lister)

	with pytest.raises(StaleData) as exc:
	swh_scheduler.update_lister(stored_lister)
	assert "state not updated" in exc.value.args[0]

	def test_record_listed_origins(self, swh_scheduler, listed_origins):
	ret = swh_scheduler.record_listed_origins(listed_origins)

	assert set(returned.url for returned in ret) == set(
	origin.url for origin in listed_origins
	)

	assert all(origin.first_seen == origin.last_seen for origin in ret)

	def test_record_listed_origins_upsert(self, swh_scheduler, listed_origins):
	# First, insert `cutoff` origins
	cutoff = 100
	assert cutoff < len(listed_origins)

	ret = swh_scheduler.record_listed_origins(listed_origins[:cutoff])
	assert len(ret) == cutoff

	# Then, insert all origins, including the `cutoff` first.
	ret = swh_scheduler.record_listed_origins(listed_origins)

	assert len(ret) == len(listed_origins)

	# Two different "first seen" values
	assert len(set(origin.first_seen for origin in ret)) == 2

	# But a single "last seen" value
	assert len(set(origin.last_seen for origin in ret)) == 1

	def test_get_listed_origins_exact(self, swh_scheduler, listed_origins):
	swh_scheduler.record_listed_origins(listed_origins)

	for i, origin in enumerate(listed_origins):
	ret = swh_scheduler.get_listed_origins(
	lister_id=origin.lister_id, url=origin.url
	)

	assert ret.next_page_token is None
	assert len(ret.results) == 1
	assert ret.results[0].lister_id == origin.lister_id
	assert ret.results[0].url == origin.url

	@pytest.mark.parametrize("num_origins,limit", [(20, 6), (5, 42), (20, 20)])
	def test_get_listed_origins_limit(
	self, swh_scheduler, listed_origins, num_origins, limit
	) -> None:
	added_origins = sorted(
	listed_origins[:num_origins], key=lambda o: (o.lister_id, o.url)
	)
	swh_scheduler.record_listed_origins(added_origins)

	returned_origins: List[ListedOrigin] = []
	call_count = 0
	next_page_token: Optional[ListedOriginPageToken] = None
	while True:
	call_count += 1
	ret = swh_scheduler.get_listed_origins(
	lister_id=listed_origins[0].lister_id,
	limit=limit,
	page_token=next_page_token,
	)
	returned_origins.extend(ret.results)
	next_page_token = ret.next_page_token
	if next_page_token is None:
	break

	assert call_count == (num_origins // limit) + 1

	assert len(returned_origins) == num_origins
	assert [(origin.lister_id, origin.url) for origin in returned_origins] == [
	(origin.lister_id, origin.url) for origin in added_origins
	]

	def test_get_listed_origins_all(self, swh_scheduler, listed_origins) -> None:
	swh_scheduler.record_listed_origins(listed_origins)

	ret = swh_scheduler.get_listed_origins(limit=len(listed_origins) + 1)
	assert ret.next_page_token is None
	assert len(ret.results) == len(listed_origins)

	def _grab_next_visits_setup(self, swh_scheduler, listed_origins_by_type):
	"""Basic origins setup for scheduling policy tests"""
	visit_type = next(iter(listed_origins_by_type))
	origins = listed_origins_by_type[visit_type][:100]
	assert len(origins) > 0

	recorded_origins = swh_scheduler.record_listed_origins(origins)

	return visit_type, recorded_origins

	def _check_grab_next_visit_basic(
	self, swh_scheduler, visit_type, policy, expected, **kwargs
	):
	"""Calls grab_next_visits with the passed policy, and check that:

	- all the origins returned are the expected ones (in the same order)
	- no extra origins are returned
	- the last_scheduled field has been set properly.

	Pass the extra keyword arguments to the calls to grab_next_visits.

	Returns a timestamp greater than all `last_scheduled` values for the grabbed
	visits.
	"""
	assert len(expected) != 0

	before = utcnow()
	ret = swh_scheduler.grab_next_visits(
	visit_type=visit_type,
	# Request one more than expected to check that no extra origin is returned
	count=len(expected) + 1,
	policy=policy,
	**kwargs,
	)
	after = utcnow()

	assert ret == expected
	visit_stats_list = swh_scheduler.origin_visit_stats_get(
	[(origin.url, origin.visit_type) for origin in expected]
	)
	assert len(visit_stats_list) == len(expected)
	for visit_stats in visit_stats_list:
	# Check that last_scheduled got updated
	assert before <= visit_stats.last_scheduled <= after

	# They should not be scheduled again
	ret = swh_scheduler.grab_next_visits(
	visit_type=visit_type, count=len(expected) + 1, policy=policy, **kwargs
	)
	assert ret == [], "grab_next_visits returned already-scheduled origins"

	return after

	def _check_grab_next_visit(
	self, swh_scheduler, visit_type, policy, expected, **kwargs
	):
	"""Run the same check as _check_grab_next_visit_basic, but also checks the
	origin visits have been marked as scheduled, and are only re-scheduled a
	week later
	"""

	after = self._check_grab_next_visit_basic(
	swh_scheduler, visit_type, policy, expected, **kwargs
	)
	# But a week, later, they should
	ret = swh_scheduler.grab_next_visits(
	visit_type=visit_type,
	count=len(expected) + 1,
	policy=policy,
	timestamp=after + timedelta(days=7),
	)
	# We need to sort them because their 'last_scheduled' field is updated to
	# exactly the same value, so the order is not deterministic
	assert sorted(ret) == sorted(
	expected
	), "grab_next_visits didn't reschedule visits after a week"

	def _prepare_oldest_scheduled_first_origins(
	self, swh_scheduler, listed_origins_by_type
	):
	visit_type, origins = self._grab_next_visits_setup(
	swh_scheduler, listed_origins_by_type
	)

	# Give all origins but one a last_scheduled date
	base_date = datetime.datetime(2020, 1, 1, 0, 0, 0, tzinfo=datetime.timezone.utc)
	visit_stats = [
	OriginVisitStats(
	url=origin.url,
	visit_type=origin.visit_type,
	last_snapshot=None,
	last_successful=None,
	last_visit=None,
	last_scheduled=base_date - timedelta(seconds=i),
	)
	for i, origin in enumerate(origins[1:])
	]
	swh_scheduler.origin_visit_stats_upsert(visit_stats)

	# We expect to retrieve the origin with a NULL last_scheduled
	# as well as those with the oldest values (i.e. the last ones), in order.
	expected = [origins[0]] + origins[1:][::-1]

	return visit_type, origins, expected

	def test_grab_next_visits_oldest_scheduled_first(
	self, swh_scheduler, listed_origins_by_type,
	):
	visit_type, origins, expected = self._prepare_oldest_scheduled_first_origins(
	swh_scheduler, listed_origins_by_type
	)
	self._check_grab_next_visit(
	swh_scheduler,
	visit_type=visit_type,
	policy="oldest_scheduled_first",
	expected=expected,
	)

	@pytest.mark.parametrize("which_cooldown", ("scheduled", "failed", "not_found"))
	@pytest.mark.parametrize("cooldown", (7, 15))
	def test_grab_next_visits_cooldowns(
	self, swh_scheduler, listed_origins_by_type, which_cooldown, cooldown,
	):
	visit_type, origins, expected = self._prepare_oldest_scheduled_first_origins(
	swh_scheduler, listed_origins_by_type
	)
	after = self._check_grab_next_visit_basic(
	swh_scheduler,
	visit_type=visit_type,
	policy="oldest_scheduled_first",
	expected=expected,
	)

	# Mark all the visits as scheduled, failed or notfound on the `after` timestamp
	ovs_args = {
	"last_visit": None,
	"last_visit_status": None,
	"last_scheduled": None,
	}
	if which_cooldown == "scheduled":
	ovs_args["last_scheduled"] = after
	else:
	ovs_args["last_visit"] = after
	ovs_args["last_visit_status"] = LastVisitStatus(which_cooldown)

	visit_stats = [
	OriginVisitStats(
	url=origin.url,
	visit_type=origin.visit_type,
	last_snapshot=None,
	last_successful=None,
	**ovs_args,
	)
	for i, origin in enumerate(origins)
	]
	swh_scheduler.origin_visit_stats_upsert(visit_stats)

	cooldown_td = timedelta(days=cooldown)
	cooldown_args = {
	"scheduled_cooldown": None,
	"failed_cooldown": None,
	"not_found_cooldown": None,
	}
	cooldown_args[f"{which_cooldown}_cooldown"] = cooldown_td

	ret = swh_scheduler.grab_next_visits(
	visit_type=visit_type,
	count=len(expected) + 1,
	policy="oldest_scheduled_first",
	timestamp=after + cooldown_td - timedelta(seconds=1),
	**cooldown_args,
	)

	assert ret == [], f"{which_cooldown}_cooldown ignored"

	ret = swh_scheduler.grab_next_visits(
	visit_type=visit_type,
	count=len(expected) + 1,
	policy="oldest_scheduled_first",
	timestamp=after + cooldown_td + timedelta(seconds=1),
	**cooldown_args,
	)

	assert sorted(ret) == sorted(
	expected
	), "grab_next_visits didn't reschedule visits after the configured cooldown"

	def test_grab_next_visits_tablesample(
	self, swh_scheduler, listed_origins_by_type,
	):
	visit_type, origins, expected = self._prepare_oldest_scheduled_first_origins(
	swh_scheduler, listed_origins_by_type
	)
	ret = swh_scheduler.grab_next_visits(
	visit_type=visit_type,
	policy="oldest_scheduled_first",
	tablesample=50,
	count=len(expected),
	)

	# Just a smoke test, not obvious how to test this more reliably
	assert ret is not None

	def test_grab_next_visits_never_visited_oldest_update_first(
	self, swh_scheduler, listed_origins_by_type,
	):
	visit_type, origins = self._grab_next_visits_setup(
	swh_scheduler, listed_origins_by_type
	)

	# Update known origins with a `last_update` field that we control
	base_date = datetime.datetime(2020, 1, 1, 0, 0, 0, tzinfo=datetime.timezone.utc)
	updated_origins = [
	attr.evolve(origin, last_update=base_date - timedelta(seconds=i))
	for i, origin in enumerate(origins)
	]
	updated_origins = swh_scheduler.record_listed_origins(updated_origins)

	# We expect to retrieve origins with the oldest update date, that is
	# origins at the end of our updated_origins list.
	expected_origins = sorted(updated_origins, key=lambda o: o.last_update)

	self._check_grab_next_visit(
	swh_scheduler,
	visit_type=visit_type,
	policy="never_visited_oldest_update_first",
	expected=expected_origins,
	)

	def test_grab_next_visits_already_visited_order_by_lag(
	self, swh_scheduler, listed_origins_by_type,
	):
	visit_type, origins = self._grab_next_visits_setup(
	swh_scheduler, listed_origins_by_type
	)

	# Update known origins with a `last_update` field that we control
	base_date = datetime.datetime(2020, 1, 1, 0, 0, 0, tzinfo=datetime.timezone.utc)
	updated_origins = [
	attr.evolve(origin, last_update=base_date - timedelta(seconds=i))
	for i, origin in enumerate(origins)
	]
	updated_origins = swh_scheduler.record_listed_origins(updated_origins)

	# Update the visit stats with a known visit at a controlled date for
	# half the origins. Pick the date in the middle of the
	# updated_origins' `last_update` range
	visit_date = updated_origins[len(updated_origins) // 2].last_update
	visited_origins = updated_origins[::2]
	visit_stats = [
	OriginVisitStats(
	url=origin.url,
	visit_type=origin.visit_type,
	last_snapshot=hash_to_bytes("d81cc0710eb6cf9efd5b920a8453e1e07157b6cd"),
	last_successful=visit_date,
	last_visit=visit_date,
	)
	for origin in visited_origins
	]
	swh_scheduler.origin_visit_stats_upsert(visit_stats)

	# We expect to retrieve visited origins with the largest lag, but only
	# those which haven't been visited since their last update
	expected_origins = sorted(
	[origin for origin in visited_origins if origin.last_update > visit_date],
	key=lambda o: visit_date - o.last_update,
	)

	self._check_grab_next_visit(
	swh_scheduler,
	visit_type=visit_type,
	policy="already_visited_order_by_lag",
	expected=expected_origins,
	)

	def test_grab_next_visits_underflow(self, swh_scheduler, listed_origins_by_type):
	"""Check that grab_next_visits works when there not enough origins in
	the database"""
	visit_type = next(iter(listed_origins_by_type))

	# Only add 5 origins to the database
	origins = listed_origins_by_type[visit_type][:5]
	assert origins

	swh_scheduler.record_listed_origins(origins)

	ret = swh_scheduler.grab_next_visits(
	visit_type, len(origins) + 2, policy="oldest_scheduled_first"
	)

	assert len(ret) == 5

	def test_grab_next_visits_no_last_update_nor_visit_stats(
	self, swh_scheduler, listed_origins_by_type
	):
	"""grab_next_visits should retrieve tasks without last update (nor visit stats)

	"""
	visit_type = next(iter(listed_origins_by_type))

	origins = []
	for origin in listed_origins_by_type[visit_type]:
	origins.append(
	attr.evolve(origin, last_update=None)
	) # void the last update so we are in the relevant context

	assert len(origins) > 0

	swh_scheduler.record_listed_origins(origins)

	# Initially, we have no global queue position
	actual_state = swh_scheduler.visit_scheduler_queue_position_get()
	assert actual_state == {}

	# nor any visit statuses
	actual_visit_stats = swh_scheduler.origin_visit_stats_get(
	(o.url, o.visit_type) for o in origins
	)
	assert len(actual_visit_stats) == 0

	# Grab some new visits
	next_visits = swh_scheduler.grab_next_visits(
	visit_type, count=len(origins), policy="origins_without_last_update",
	)
	# we do have the one without any last update
	assert len(next_visits) == len(origins)

	# Now the global state got updated
	actual_state = swh_scheduler.visit_scheduler_queue_position_get()
	assert actual_state[visit_type] is not None

	actual_visit_stats = swh_scheduler.origin_visit_stats_get(
	(o.url, o.visit_type) for o in next_visits
	)

	# Visit stats got algo created
	assert len(actual_visit_stats) == len(origins)

	def test_grab_next_visits_no_last_update_with_visit_stats(
	self, swh_scheduler, listed_origins_by_type
	):
	"""grab_next_visits should retrieve tasks without last update"""
	visit_type = next(iter(listed_origins_by_type))

	origins = []
	for origin in listed_origins_by_type[visit_type]:
	origins.append(
	attr.evolve(origin, last_update=None)
	) # void the last update so we are in the relevant context

	assert len(origins) > 0

	swh_scheduler.record_listed_origins(origins)

	# Initially, we have no global queue position
	actual_state = swh_scheduler.visit_scheduler_queue_position_get()
	assert actual_state == {}

	date_now = utcnow()
	# Simulate some of those origins have associated visit stats (some with an
	# existing queue position and some without any)
	visit_stats = (
	[
	OriginVisitStats(
	url=origin.url,
	visit_type=origin.visit_type,
	last_successful=utcnow(),
	last_visit=utcnow(),
	next_visit_queue_position=date_now
	+ timedelta(days=random.uniform(-10, 1)),
	)
	for origin in origins[:100]
	]
	+ [
	OriginVisitStats(
	url=origin.url,
	visit_type=origin.visit_type,
	last_successful=utcnow(),
	last_visit=utcnow(),
	next_visit_queue_position=date_now
	+ timedelta(days=random.uniform(1, 10)), # definitely > now()
	)
	for origin in origins[100:150]
	]
	+ [
	OriginVisitStats(
	url=origin.url,
	visit_type=origin.visit_type,
	last_successful=utcnow(),
	last_visit=utcnow(),
	)
	for origin in origins[150:]
	]
	)

	swh_scheduler.origin_visit_stats_upsert(visit_stats)

	# Grab next visits
	actual_visits = swh_scheduler.grab_next_visits(
	visit_type, count=len(origins), policy="origins_without_last_update",
	)
	assert len(actual_visits) == len(origins)

	actual_visit_stats = swh_scheduler.origin_visit_stats_get(
	(o.url, o.visit_type) for o in actual_visits
	)
	assert len(actual_visit_stats) == len(origins)

	actual_state = swh_scheduler.visit_scheduler_queue_position_get()
	assert actual_state == {
	visit_type: max(
	s.next_visit_queue_position
	for s in actual_visit_stats
	if s.next_visit_queue_position is not None
	)
	}

	def test_grab_next_visits_unknown_policy(self, swh_scheduler):
	unknown_policy = "non_existing_policy"
	NUM_RESULTS = 5
	with pytest.raises(UnknownPolicy, match=unknown_policy):
	swh_scheduler.grab_next_visits("type", NUM_RESULTS, policy=unknown_policy)

	def _create_task_types(self, scheduler):
	for tt in TASK_TYPES.values():
	scheduler.create_task_type(tt)

	def test_origin_visit_stats_get_empty(self, swh_scheduler) -> None:
	assert swh_scheduler.origin_visit_stats_get([]) == []

	def test_origin_visit_stats_get_pagination(self, swh_scheduler) -> None:
	page_size = inspect.signature(execute_values).parameters["page_size"].default

	visit_stats = [
	OriginVisitStats(
	url=f"https://example.com/origin-{i:03d}",
	visit_type="git",
	last_successful=utcnow(),
	last_visit=utcnow(),
	)
	for i in range(
	page_size + 1
	) # Ensure overflow of the psycopg2.extras.execute_values page_size
	]

	swh_scheduler.origin_visit_stats_upsert(visit_stats)

	assert set(
	swh_scheduler.origin_visit_stats_get(
	[(ovs.url, ovs.visit_type) for ovs in visit_stats]
	)
	) == set(visit_stats)

	def test_origin_visit_stats_upsert(self, swh_scheduler) -> None:
	eventful_date = utcnow()
	url = "https://github.com/test"

	visit_stats = OriginVisitStats(
	url=url,
	visit_type="git",
	last_successful=eventful_date,
	last_visit=eventful_date,
	)
	swh_scheduler.origin_visit_stats_upsert([visit_stats])
	swh_scheduler.origin_visit_stats_upsert([visit_stats])

	assert swh_scheduler.origin_visit_stats_get([(url, "git")]) == [visit_stats]
	assert swh_scheduler.origin_visit_stats_get([(url, "svn")]) == []

	new_visit_date = utcnow()
	visit_stats = OriginVisitStats(
	url=url, visit_type="git", last_successful=None, last_visit=new_visit_date,
	)
	swh_scheduler.origin_visit_stats_upsert([visit_stats])

	uneventful_visits = swh_scheduler.origin_visit_stats_get([(url, "git")])

	expected_visit_stats = OriginVisitStats(
	url=url,
	visit_type="git",
	last_successful=eventful_date,
	last_visit=new_visit_date,
	)

	assert uneventful_visits == [expected_visit_stats]

	def test_origin_visit_stats_upsert_with_snapshot(self, swh_scheduler) -> None:
	eventful_date = utcnow()
	url = "https://github.com/666/test"

	visit_stats = OriginVisitStats(
	url=url,
	visit_type="git",
	last_successful=eventful_date,
	last_snapshot=hash_to_bytes("d81cc0710eb6cf9efd5b920a8453e1e07157b6cd"),
	)
	swh_scheduler.origin_visit_stats_upsert([visit_stats])

	assert swh_scheduler.origin_visit_stats_get([(url, "git")]) == [visit_stats]
	assert swh_scheduler.origin_visit_stats_get([(url, "svn")]) == []

	def test_origin_visit_stats_upsert_batch(self, swh_scheduler) -> None:
	"""Batch upsert is ok"""
	visit_stats = [
	OriginVisitStats(
	url="foo",
	visit_type="git",
	last_successful=utcnow(),
	last_snapshot=hash_to_bytes("d81cc0710eb6cf9efd5b920a8453e1e07157b6cd"),
	),
	OriginVisitStats(
	url="bar",
	visit_type="git",
	last_visit=utcnow(),
	last_snapshot=hash_to_bytes("fffcc0710eb6cf9efd5b920a8453e1e07157bfff"),
	),
	]

	swh_scheduler.origin_visit_stats_upsert(visit_stats)

	for visit_stat in swh_scheduler.origin_visit_stats_get(
	[(vs.url, vs.visit_type) for vs in visit_stats]
	):
	assert visit_stat is not None

	def test_origin_visit_stats_upsert_cardinality_failing(self, swh_scheduler) -> None:
	"""Batch upsert does not support altering multiple times the same origin-visit-status

	"""
	with pytest.raises(SchedulerException, match="CardinalityViolation"):
	swh_scheduler.origin_visit_stats_upsert(
	[
	OriginVisitStats(
	url="foo",
	visit_type="git",
	last_successful=None,
	last_visit=utcnow(),
	),
	OriginVisitStats(
	url="foo",
	visit_type="git",
	last_successful=utcnow(),
	last_visit=None,
	),
	]
	)

	def test_visit_scheduler_queue_position(
	self, swh_scheduler, listed_origins
	) -> None:
	result = swh_scheduler.visit_scheduler_queue_position_get()
	assert result == {}

	expected_result = {}
	visit_types = set()
	for origin in listed_origins:
	visit_type = origin.visit_type
	if visit_type in visit_types:
	continue
	visit_types.add(visit_type)
	position = utcnow()
	swh_scheduler.visit_scheduler_queue_position_set(visit_type, position)
	expected_result[visit_type] = position

	result = swh_scheduler.visit_scheduler_queue_position_get()
	assert result == expected_result

	def test_metrics_origins_known(self, swh_scheduler, listed_origins):
	swh_scheduler.record_listed_origins(listed_origins)

	ret = swh_scheduler.update_metrics()

	assert sum(metric.origins_known for metric in ret) == len(listed_origins)

	def test_metrics_origins_enabled(self, swh_scheduler, listed_origins):
	swh_scheduler.record_listed_origins(listed_origins)
	disabled_origin = attr.evolve(listed_origins[0], enabled=False)
	swh_scheduler.record_listed_origins([disabled_origin])

	ret = swh_scheduler.update_metrics(lister_id=disabled_origin.lister_id)
	for metric in ret:
	if metric.visit_type == disabled_origin.visit_type:
	# We disabled one of these origins
	assert metric.origins_known - metric.origins_enabled == 1
	else:
	# But these are still all enabled
	assert metric.origins_known == metric.origins_enabled

	def test_metrics_origins_never_visited(self, swh_scheduler, listed_origins):
	swh_scheduler.record_listed_origins(listed_origins)

	# Pretend that we've recorded a visit on one origin
	visited_origin = listed_origins[0]
	swh_scheduler.origin_visit_stats_upsert(
	[
	OriginVisitStats(
	url=visited_origin.url,
	visit_type=visited_origin.visit_type,
	last_successful=utcnow(),
	last_snapshot=hash_to_bytes(
	"d81cc0710eb6cf9efd5b920a8453e1e07157b6cd"
	),
	),
	]
	)

	ret = swh_scheduler.update_metrics(lister_id=visited_origin.lister_id)
	for metric in ret:
	if metric.visit_type == visited_origin.visit_type:
	# We visited one of these origins
	assert metric.origins_known - metric.origins_never_visited == 1
	else:
	# But none of these have been visited
	assert metric.origins_known == metric.origins_never_visited

	def test_metrics_origins_with_pending_changes(self, swh_scheduler, listed_origins):
	swh_scheduler.record_listed_origins(listed_origins)

	# Pretend that we've recorded a visit on one origin, in the past with
	# respect to the "last update" time for the origin
	visited_origin = listed_origins[0]
	assert visited_origin.last_update is not None
	swh_scheduler.origin_visit_stats_upsert(
	[
	OriginVisitStats(
	url=visited_origin.url,
	visit_type=visited_origin.visit_type,
	last_successful=visited_origin.last_update - timedelta(days=1),
	last_snapshot=hash_to_bytes(
	"d81cc0710eb6cf9efd5b920a8453e1e07157b6cd"
	),
	),
	]
	)

	ret = swh_scheduler.update_metrics(lister_id=visited_origin.lister_id)
	for metric in ret:
	if metric.visit_type == visited_origin.visit_type:
	# We visited one of these origins, in the past
	assert metric.origins_with_pending_changes == 1
	else:
	# But none of these have been visited
	assert metric.origins_with_pending_changes == 0

	def test_update_metrics_explicit_lister(self, swh_scheduler, listed_origins):
	swh_scheduler.record_listed_origins(listed_origins)

	fake_uuid = uuid.uuid4()
	assert all(fake_uuid != origin.lister_id for origin in listed_origins)

	ret = swh_scheduler.update_metrics(lister_id=fake_uuid)

	assert len(ret) == 0

	def test_update_metrics_explicit_timestamp(self, swh_scheduler, listed_origins):
	swh_scheduler.record_listed_origins(listed_origins)

	ts = datetime.datetime(2020, 1, 1, 0, 0, 0, tzinfo=datetime.timezone.utc)

	ret = swh_scheduler.update_metrics(timestamp=ts)

	assert all(metric.last_update == ts for metric in ret)

	def test_update_metrics_twice(self, swh_scheduler, listed_origins):
	swh_scheduler.record_listed_origins(listed_origins)

	ts = utcnow()
	ret = swh_scheduler.update_metrics(timestamp=ts)
	assert all(metric.last_update == ts for metric in ret)

	second_ts = ts + timedelta(seconds=1)
	ret = swh_scheduler.update_metrics(timestamp=second_ts)
	assert all(metric.last_update == second_ts for metric in ret)

	def test_get_metrics(self, swh_scheduler, listed_origins):
	swh_scheduler.record_listed_origins(listed_origins)
	updated = swh_scheduler.update_metrics()

	retrieved = swh_scheduler.get_metrics()
	assert_metrics_equal(updated, retrieved)

	def test_get_metrics_by_lister(self, swh_scheduler, listed_origins):
	lister_id = listed_origins[0].lister_id
	assert lister_id is not None

	swh_scheduler.record_listed_origins(listed_origins)
	updated = swh_scheduler.update_metrics()

	retrieved = swh_scheduler.get_metrics(lister_id=lister_id)
	assert len(retrieved) > 0

	assert_metrics_equal(
	[metric for metric in updated if metric.lister_id == lister_id], retrieved
	)

	def test_get_metrics_by_visit_type(self, swh_scheduler, listed_origins):
	visit_type = listed_origins[0].visit_type
	assert visit_type is not None

	swh_scheduler.record_listed_origins(listed_origins)
	updated = swh_scheduler.update_metrics()

	retrieved = swh_scheduler.get_metrics(visit_type=visit_type)
	assert len(retrieved) > 0

	assert_metrics_equal(
	[metric for metric in updated if metric.visit_type == visit_type], retrieved
	)

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