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unused_function_test.py
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# python3 -m pytest test-unused_function_test.py
import os
import json
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():
ret, stdout, stderr = cppcheck(['-q', '--template=simple', '--enable=unusedFunction', '--inline-suppr', '-j1', __project_dir])
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout
def test_unused_functions_j():
ret, stdout, stderr = cppcheck(['-q', '--template=simple', '--enable=unusedFunction', '--inline-suppr', '-j2', __project_dir])
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():
ret, stdout, stderr = cppcheck(['-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(os.path.join(__project_dir, 'unusedFunction.cppcheck')),
'-j1'])
assert stdout.splitlines() == []
assert [
"{}3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep)
] == stderr.splitlines()
assert ret == 0, stdout
def test_unused_functions_project_j():
ret, stdout, stderr = cppcheck(['-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(os.path.join(__project_dir, 'unusedFunction.cppcheck')),
'-j2'])
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(tmpdir):
compdb_file = __create_compdb(tmpdir, __project_dir)
ret, stdout, stderr = cppcheck(['-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(compdb_file),
'-j1'
])
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout
def test_unused_functions_compdb_j(tmpdir):
compdb_file = __create_compdb(tmpdir, __project_dir)
ret, stdout, stderr = cppcheck(['-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(compdb_file),
'-j2'
])
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)
ret, stdout, stderr = cppcheck(['-q', '--template=simple', '--enable=unusedFunction', '--inline-suppr', '-j1', '--cppcheck-build-dir={}'.format(build_dir), __project_dir])
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout
# TODO: only f3_3 is unused
def test_unused_functions_builddir_j(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
ret, stdout, stderr = cppcheck(['-q', '--template=simple', '--enable=unusedFunction', '--inline-suppr', '-j2', '--cppcheck-build-dir={}'.format(build_dir), __project_dir])
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}1.c:4:0: style: The function 'f1' is never used. [unusedFunction]".format(__project_dir_sep),
"{}2.c:4:0: style: The function 'f2' is never used. [unusedFunction]".format(__project_dir_sep),
"{}3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep),
"{}4.c:4:0: style: The function 'f4_1' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout
def test_unused_functions_builddir_project(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
ret, stdout, stderr = cppcheck(['-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(os.path.join(__project_dir, 'unusedFunction.cppcheck')),
'--cppcheck-build-dir={}'.format(build_dir),
'-j1'])
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout
# TODO: only f3_3 is unused
def test_unused_functions_builddir_project_j(tmpdir):
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
ret, stdout, stderr = cppcheck(['-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(os.path.join(__project_dir, 'unusedFunction.cppcheck')),
'--cppcheck-build-dir={}'.format(build_dir),
'-j2'])
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}1.c:4:0: style: The function 'f1' is never used. [unusedFunction]".format(__project_dir_sep),
"{}2.c:4:0: style: The function 'f2' is never used. [unusedFunction]".format(__project_dir_sep),
"{}3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep),
"{}4.c:4:0: style: The function 'f4_1' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout
def test_unused_functions_builddir_compdb(tmpdir):
compdb_file = __create_compdb(tmpdir, __project_dir)
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
ret, stdout, stderr = cppcheck(['-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(compdb_file),
'--cppcheck-build-dir={}'.format(build_dir),
'-j1'
])
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout
# TODO: only f3_3 is unused
def test_unused_functions_builddir_compdb_j(tmpdir):
compdb_file = __create_compdb(tmpdir, __project_dir)
build_dir = os.path.join(tmpdir, 'b1')
os.mkdir(build_dir)
ret, stdout, stderr = cppcheck(['-q',
'--template=simple',
'--enable=unusedFunction',
'--inline-suppr',
'--project={}'.format(compdb_file),
'--cppcheck-build-dir={}'.format(build_dir),
'-j2'
])
assert stdout.splitlines() == []
assert stderr.splitlines() == [
"{}1.c:4:0: style: The function 'f1' is never used. [unusedFunction]".format(__project_dir_sep),
"{}2.c:4:0: style: The function 'f2' is never used. [unusedFunction]".format(__project_dir_sep),
"{}3.c:3:0: style: The function 'f3_3' is never used. [unusedFunction]".format(__project_dir_sep),
"{}4.c:4:0: style: The function 'f4_1' is never used. [unusedFunction]".format(__project_dir_sep)
]
assert ret == 0, stdout