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# Copyright 2021 Google LLC
#
# 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.
"""Tests for coverage.py"""
import os
import json
import unittest
from unittest import mock
import coverage
# pylint: disable=protected-access
TEST_FILES_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)),
'test_files')
class GetFuzzerStatsDirUrlTest(unittest.TestCase):
"""Tests _get_fuzzer_stats_dir_url."""
TEST_PROJECT = 'curl'
@mock.patch('coverage.get_json_from_url', return_value={})
def test_get_valid_project(self, mocked_get_json_from_url):
"""Tests that a project's coverage report can be downloaded and parsed.
NOTE: This test relies on the TEST_PROJECT repo's coverage report.
The "example" project was not used because it has no coverage reports.
"""
coverage._get_fuzzer_stats_dir_url(self.TEST_PROJECT)
(url,), _ = mocked_get_json_from_url.call_args
self.assertEqual(
'https://storage.googleapis.com/oss-fuzz-coverage/'
'latest_report_info/curl.json', url)
def test_get_invalid_project(self):
"""Tests that passing a bad project returns None."""
self.assertIsNone(coverage._get_fuzzer_stats_dir_url('not-a-proj'))
class GetTargetCoverageReportTest(unittest.TestCase):
"""Tests get_target_coverage_report."""
EXAMPLE_COV_JSON = 'example_curl_cov.json'
EXAMPLE_FUZZER = 'curl_fuzzer'
def setUp(self):
with open(os.path.join(TEST_FILES_PATH, self.EXAMPLE_COV_JSON),
'r') as file_handle:
example_cov_info = json.loads(file_handle.read())
project_name = 'curl'
repo_path = '/src/curl'
with mock.patch('coverage._get_latest_cov_report_info',
return_value=example_cov_info):
self.coverage_getter = coverage.OssFuzzCoverageGetter(
project_name, repo_path)
@mock.patch('coverage.get_json_from_url', return_value={})
def test_valid_target(self, mocked_get_json_from_url):
"""Tests that a target's coverage report can be downloaded and parsed."""
self.coverage_getter.get_target_coverage_report(self.EXAMPLE_FUZZER)
(url,), _ = mocked_get_json_from_url.call_args
self.assertEqual(
'https://storage.googleapis.com/oss-fuzz-coverage/'
'curl/fuzzer_stats/20200226/curl_fuzzer.json', url)
def test_invalid_target(self):
"""Tests that passing an invalid target coverage report returns None."""
self.assertIsNone(
self.coverage_getter.get_target_coverage_report('not-valid-target'))
class GetFilesCoveredByTargetTest(unittest.TestCase):
"""Tests get_files_covered_by_target."""
FUZZER_COV_JSON_FILENAME = 'example_curl_fuzzer_cov.json'
EXAMPLE_FUZZER = 'curl_fuzzer'
PROJECT_NAME = 'curl'
REPO_PATH = '/src/curl'
def setUp(self):
example_cov_json = 'example_curl_cov.json'
with open(os.path.join(TEST_FILES_PATH, example_cov_json)) as file_handle:
self.cov_report = json.loads(file_handle.read())
with mock.patch('coverage._get_latest_cov_report_info',
return_value=self.cov_report):
self.coverage_getter = coverage.OssFuzzCoverageGetter(
self.PROJECT_NAME, self.REPO_PATH)
with open(os.path.join(TEST_FILES_PATH,
self.FUZZER_COV_JSON_FILENAME)) as file_handle:
self.fuzzer_cov_report = json.loads(file_handle.read())
def test_valid_target(self):
"""Tests that covered files can be retrieved from a coverage report."""
with mock.patch('coverage.OssFuzzCoverageGetter.get_target_coverage_report',
return_value=self.fuzzer_cov_report):
file_list = self.coverage_getter.get_files_covered_by_target(
self.EXAMPLE_FUZZER)
curl_files_list_path = os.path.join(TEST_FILES_PATH,
'example_curl_file_list.json')
with open(curl_files_list_path) as file_handle:
true_files_list = json.load(file_handle)
self.assertCountEqual(file_list, true_files_list)
if __name__ == '__main__':
unittest.main()
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