tools/scan-build-py/tests/functional/cases/test_exec_anatomy.py

# -*- coding: utf-8 -*-
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

import libear
import unittest

import os.path
import subprocess
import json


def run(source_dir, target_dir):
    def execute(cmd):
        return subprocess.check_call(cmd,
                                     cwd=target_dir,
                                     stdout=subprocess.PIPE,
                                     stderr=subprocess.STDOUT)

    execute(['cmake', source_dir])
    execute(['make'])

    result_file = os.path.join(target_dir, 'result.json')
    expected_file = os.path.join(target_dir, 'expected.json')
    execute(['intercept-build', '--cdb', result_file, './exec',
             expected_file])
    return (expected_file, result_file)


class ExecAnatomyTest(unittest.TestCase):
    def assertEqualJson(self, expected, result):
        def read_json(filename):
            with open(filename) as handler:
                return json.load(handler)

        lhs = read_json(expected)
        rhs = read_json(result)
        for item in lhs:
            self.assertTrue(rhs.count(item))
        for item in rhs:
            self.assertTrue(lhs.count(item))

    def test_all_exec_calls(self):
        this_dir, _ = os.path.split(__file__)
        source_dir = os.path.normpath(os.path.join(this_dir, '..', 'exec'))
        with libear.TemporaryDirectory() as tmp_dir:
            expected, result = run(source_dir, tmp_dir)
            self.assertEqualJson(expected, result)