Before:
  call ale#assert#SetUpLinterTest('cpp', 'cppcheck')
  let b:command_tail = ' -q --language=c++ --enable=style %t'

After:
  unlet! b:command_tail
  call ale#assert#TearDownLinterTest()

Execute(The executable should be configurable):
  AssertLinter 'cppcheck', ale#Escape('cppcheck') . b:command_tail

  let b:ale_cpp_cppcheck_executable = 'foobar'

  AssertLinter 'foobar', ale#Escape('foobar') . b:command_tail

Execute(cppcheck for C++ should detect compile_commands.json files):
  call ale#test#SetFilename('cppcheck_paths/one/foo.cpp')

  AssertLinter 'cppcheck',
  \ 'cd ' . ale#Escape(ale#path#Simplify(g:dir . '/cppcheck_paths/one')) . ' && '
  \   . ale#Escape('cppcheck')
  \   . ' -q --language=c++ --project=compile_commands.json --enable=style %t'