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# python3 -m pytest test-unused_function_test.py
import os
import json
import sys
import pytest
from testutils import cppcheck
__script_dir = os.path.dirname(os.path.abspath(__file__))
__project_dir = os.path.join(__script_dir, 'unusedFunction')
__project_dir_sep = __project_dir + os.path.sep
# TODO: make this a generic helper function
def __create_compdb(tmpdir, projpath):
compile_commands = os.path.join(tmpdir, 'compile_commands.json')
files = []
for f in os.listdir(projpath):
files.append(f)
files.sort()
j = []
for f in files:
j.append({
'directory': projpath,
'file': os.path.join(projpath, f),
'command': 'gcc -c {}'.format(f)
})
with open(compile_commands, 'wt') as f:
f.write(json.dumps(j, indent=4))
return compile_commands
def __test_unused_functions(extra_args):
args = [
'-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
__project_dir
]
args += extra_args
ret, stdout, stderr = cppcheck(args)
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}3.c:3:6: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout
def test_unused_functions():
__test_unused_functions(['-j1', '--no-cppcheck-build-dir'])
def test_unused_functions_j():
args = [
'-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'-j2',
'--no-cppcheck-build-dir',
__project_dir
]
ret, stdout, stderr = cppcheck(args)
assert stdout.splitlines() == [
"cppcheck: unusedFunction check requires --cppcheck-build-dir to be active with -j."
]
assert stderr.splitlines() == []
assert ret == 0, stdout
def test_unused_functions_builddir(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
__test_unused_functions(['-j1', '--cppcheck-build-dir={}'.format(build_dir)])
def test_unused_functions_builddir_j_thread(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
__test_unused_functions(['-j2', '--cppcheck-build-dir={}'.format(build_dir), '--executor=thread'])
@pytest.mark.skipif(sys.platform == 'win32', reason='ProcessExecutor not available on Windows')
def test_unused_functions_builddir_j_process(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
__test_unused_functions(['-j2', '--cppcheck-build-dir={}'.format(build_dir), '--executor=process'])
def __test_unused_functions_project(extra_args):
project_file = os.path.join(__project_dir, 'unusedFunction.cppcheck')
args = [
'-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(project_file),
]
args += extra_args
ret, stdout, stderr = cppcheck(args)
assert stdout.splitlines() == []
assert [
"{}3.c:3:6: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep)
] == stderr.splitlines()
assert ret == 0, stdout
def test_unused_functions_project():
__test_unused_functions_project(['-j1', '--no-cppcheck-build-dir'])
def test_unused_functions_project_j():
project_file = os.path.join(__project_dir, 'unusedFunction.cppcheck')
args = [
'-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(project_file),
'-j2',
'--no-cppcheck-build-dir'
]
ret, stdout, stderr = cppcheck(args)
assert stdout.splitlines() == [
"cppcheck: unusedFunction check requires --cppcheck-build-dir to be active with -j."
]
assert [] == stderr.splitlines()
assert ret == 0, stdout
def test_unused_functions_project_builddir(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
__test_unused_functions_project(['-j1', '--cppcheck-build-dir={}'.format(build_dir)])
def test_unused_functions_project_builddir_j_thread(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
__test_unused_functions_project(['-j2', '--cppcheck-build-dir={}'.format(build_dir), '--executor=thread'])
@pytest.mark.skipif(sys.platform == 'win32', reason='ProcessExecutor not available on Windows')
def test_unused_functions_project_builddir_j_process(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
__test_unused_functions_project(['-j2', '--cppcheck-build-dir={}'.format(build_dir), '--executor=process'])
def __test_unused_functions_compdb(tmpdir, extra_args):
compdb_file = __create_compdb(tmpdir, __project_dir)
args = [
'-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(compdb_file)
]
args += extra_args
ret, stdout, stderr = cppcheck(args)
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}3.c:3:6: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout
def test_unused_functions_compdb(tmpdir):
__test_unused_functions_compdb(tmpdir, ['-j1', '--no-cppcheck-build-dir'])
def test_unused_functions_compdb_j(tmpdir):
compdb_file = __create_compdb(tmpdir, __project_dir)
args = [
'-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(compdb_file),
'-j2',
'--no-cppcheck-build-dir'
]
ret, stdout, stderr = cppcheck(args)
assert stdout.splitlines() == [
"cppcheck: unusedFunction check requires --cppcheck-build-dir to be active with -j."
]
assert stderr.splitlines() == []
assert ret == 0, stdout
def test_unused_functions_compdb_buildir_j_thread(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
__test_unused_functions_compdb(tmpdir, ['-j2', '--cppcheck-build-dir={}'.format(build_dir), '--executor=thread'])
@pytest.mark.skipif(sys.platform == 'win32', reason='ProcessExecutor not available on Windows')
def test_unused_functions_compdb_builddir_j_process(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
__test_unused_functions_compdb(tmpdir, ['-j2', '--cppcheck-build-dir={}'.format(build_dir), '--executor=process'])