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# Copyright 2020 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
################################################################################
"""Utility functions for testing cloud functions."""
import datetime
import os
import subprocess
import threading
import requests
DATASTORE_READY_INDICATOR = b'is now running'
DATASTORE_EMULATOR_PORT = 8432
EMULATOR_TIMEOUT = 20
FUNCTIONS_DIR = os.path.dirname(__file__)
OSS_FUZZ_DIR = os.path.dirname(os.path.dirname(os.path.dirname(FUNCTIONS_DIR)))
PROJECTS_DIR = os.path.join(OSS_FUZZ_DIR, 'projects')
FAKE_DATETIME = datetime.datetime(2020, 1, 1, 0, 0, 0)
IMAGE_PROJECT = 'oss-fuzz'
BASE_IMAGES_PROJECT = 'oss-fuzz-base'
PROJECT = 'test-project'
PROJECT_DIR = os.path.join(PROJECTS_DIR, PROJECT)
def create_project_data(project,
project_yaml_contents,
dockerfile_contents='test line'):
"""Creates a project.yaml with |project_yaml_contents| and a Dockerfile with
|dockerfile_contents| for |project|."""
project_dir = os.path.join(PROJECTS_DIR, project)
project_yaml_path = os.path.join(project_dir, 'project.yaml')
with open(project_yaml_path, 'w') as project_yaml_handle:
project_yaml_handle.write(project_yaml_contents)
dockerfile_path = os.path.join(project_dir, 'Dockerfile')
with open(dockerfile_path, 'w') as dockerfile_handle:
dockerfile_handle.write(dockerfile_contents)
def start_datastore_emulator():
"""Start Datastore emulator."""
return subprocess.Popen([
'gcloud',
'beta',
'emulators',
'datastore',
'start',
'--consistency=1.0',
'--host-port=localhost:' + str(DATASTORE_EMULATOR_PORT),
'--project=' + PROJECT,
'--no-store-on-disk',
],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
def wait_for_emulator_ready(proc,
emulator,
indicator,
timeout=EMULATOR_TIMEOUT):
"""Wait for emulator to be ready."""
def _read_thread(proc, ready_event):
"""Thread to continuously read from the process stdout."""
ready = False
while True:
line = proc.stdout.readline()
if not line:
break
if not ready and indicator in line:
ready = True
ready_event.set()
# Wait for process to become ready.
ready_event = threading.Event()
thread = threading.Thread(target=_read_thread, args=(proc, ready_event))
thread.daemon = True
thread.start()
if not ready_event.wait(timeout):
raise RuntimeError(f'{emulator} emulator did not get ready in time.')
return thread
def reset_ds_emulator():
"""Reset ds emulator/clean all entities."""
req = requests.post(f'http://localhost:{DATASTORE_EMULATOR_PORT}/reset')
req.raise_for_status()
def cleanup_emulator(ds_emulator):
"""Cleanup the system processes made by ds emulator."""
del ds_emulator #To do, find a better way to cleanup emulator
os.system('pkill -f datastore')
def set_gcp_environment():
"""Set environment variables for simulating in google cloud platform."""
os.environ['DATASTORE_EMULATOR_HOST'] = 'localhost:' + str(
DATASTORE_EMULATOR_PORT)
os.environ['GOOGLE_CLOUD_PROJECT'] = PROJECT
os.environ['DATASTORE_DATASET'] = PROJECT
os.environ['GCP_PROJECT'] = PROJECT
os.environ['FUNCTION_REGION'] = 'us-central1'
def get_test_data_file_path(filename):
"""Returns the path to a test data file with name |filename|."""
return os.path.join(os.path.dirname(__file__), 'test_data', filename)
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