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unused_function_test.py
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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'
])
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