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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2019 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Unit tests for retrieving the LLVM hash."""
from __future__ import print_function
import subprocess
import unittest
import unittest.mock as mock
import get_llvm_hash
from get_llvm_hash import LLVMHash
# We grab protected stuff from get_llvm_hash. That's OK.
# pylint: disable=protected-access
def MakeMockPopen(return_code):
def MockPopen(*_args, **_kwargs):
result = mock.MagicMock()
result.returncode = return_code
communicate_result = result.communicate.return_value
# Communicate returns stdout, stderr.
communicate_result.__iter__.return_value = (None, 'some stderr')
return result
return MockPopen
class TestGetLLVMHash(unittest.TestCase):
"""The LLVMHash test class."""
@mock.patch.object(subprocess, 'Popen')
def testCloneRepoSucceedsWhenGitSucceeds(self, popen_mock):
popen_mock.side_effect = MakeMockPopen(return_code=0)
llvm_hash = LLVMHash()
into_tempdir = '/tmp/tmpTest'
llvm_hash.CloneLLVMRepo(into_tempdir)
popen_mock.assert_called_with(
['git', 'clone', get_llvm_hash._LLVM_GIT_URL, into_tempdir],
stderr=subprocess.PIPE)
@mock.patch.object(subprocess, 'Popen')
def testCloneRepoFailsWhenGitFails(self, popen_mock):
popen_mock.side_effect = MakeMockPopen(return_code=1)
with self.assertRaises(ValueError) as err:
LLVMHash().CloneLLVMRepo('/tmp/tmp1')
self.assertIn('Failed to clone', str(err.exception.args))
self.assertIn('some stderr', str(err.exception.args))
@mock.patch.object(get_llvm_hash, 'GetGitHashFrom')
def testGetGitHashWorks(self, mock_get_git_hash):
mock_get_git_hash.return_value = 'a13testhash2'
self.assertEqual(
get_llvm_hash.GetGitHashFrom('/tmp/tmpTest', 100), 'a13testhash2')
mock_get_git_hash.assert_called_once()
@mock.patch.object(LLVMHash, 'GetLLVMHash')
@mock.patch.object(get_llvm_hash, 'GetGoogle3LLVMVersion')
def testReturnGoogle3LLVMHash(self, mock_google3_llvm_version,
mock_get_llvm_hash):
mock_get_llvm_hash.return_value = 'a13testhash3'
mock_google3_llvm_version.return_value = 1000
self.assertEqual(LLVMHash().GetGoogle3LLVMHash(), 'a13testhash3')
mock_get_llvm_hash.assert_called_once_with(1000)
@mock.patch.object(LLVMHash, 'GetLLVMHash')
@mock.patch.object(get_llvm_hash, 'GetGoogle3LLVMVersion')
def testReturnGoogle3UnstableLLVMHash(self, mock_google3_llvm_version,
mock_get_llvm_hash):
mock_get_llvm_hash.return_value = 'a13testhash3'
mock_google3_llvm_version.return_value = 1000
self.assertEqual(LLVMHash().GetGoogle3UnstableLLVMHash(), 'a13testhash3')
mock_get_llvm_hash.assert_called_once_with(1000)
@mock.patch.object(subprocess, 'check_output')
def testSuccessfullyGetGitHashFromToTOfLLVM(self, mock_check_output):
mock_check_output.return_value = 'a123testhash1 path/to/main\n'
self.assertEqual(LLVMHash().GetTopOfTrunkGitHash(), 'a123testhash1')
mock_check_output.assert_called_once()
@mock.patch.object(subprocess, 'Popen')
def testCheckoutBranch(self, mock_popen):
mock_popen.return_value = mock.MagicMock(
communicate=lambda: (None, None), returncode=0)
get_llvm_hash.CheckoutBranch('fake/src_dir', 'fake_branch')
self.assertEqual(
mock_popen.call_args_list[0][0],
(['git', '-C', 'fake/src_dir', 'checkout', 'fake_branch'],))
self.assertEqual(mock_popen.call_args_list[1][0],
(['git', '-C', 'fake/src_dir', 'pull'],))
def testParseLLVMMajorVersion(self):
cmakelist_42 = ('set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)\n'
'if(NOT DEFINED LLVM_VERSION_MAJOR)\n'
' set(LLVM_VERSION_MAJOR 42)\n'
'endif()')
self.assertEqual(get_llvm_hash.ParseLLVMMajorVersion(cmakelist_42), '42')
def testParseLLVMMajorVersionInvalid(self):
invalid_cmakelist = 'invalid cmakelist.txt contents'
with self.assertRaises(ValueError):
get_llvm_hash.ParseLLVMMajorVersion(invalid_cmakelist)
@mock.patch.object(get_llvm_hash, 'GetAndUpdateLLVMProjectInLLVMTools')
@mock.patch.object(get_llvm_hash, 'ParseLLVMMajorVersion')
@mock.patch.object(get_llvm_hash, 'CheckCommand')
@mock.patch.object(get_llvm_hash, 'CheckoutBranch')
@mock.patch(
'get_llvm_hash.open',
mock.mock_open(read_data='mock contents'),
create=True)
def testGetLLVMMajorVersion(self, mock_checkout_branch, mock_git_checkout,
mock_major_version, mock_llvm_project_path):
mock_llvm_project_path.return_value = 'path/to/llvm-project'
mock_major_version.return_value = '1234'
self.assertEqual(get_llvm_hash.GetLLVMMajorVersion('314159265'), '1234')
# Second call should be memoized
self.assertEqual(get_llvm_hash.GetLLVMMajorVersion('314159265'), '1234')
mock_llvm_project_path.assert_called_once()
mock_major_version.assert_called_with('mock contents')
mock_git_checkout.assert_called_once_with(
['git', '-C', 'path/to/llvm-project', 'checkout', '314159265'])
mock_checkout_branch.assert_called_once_with('path/to/llvm-project', 'main')
if __name__ == '__main__':
unittest.main()
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