Before:
  call ale#assert#SetUpLinterTest('nim', 'nimlsp')

After:
  call ale#assert#TearDownLinterTest()

Execute(It does not set nim sources by default):
  AssertLinter 'nimlsp', ale#Escape('nimlsp')

Execute(Sets nimlsp and escapes sources from g:ale_nim_nimlsp_nim_sources):
  let g:ale_nim_nimlsp_nim_sources = '/path/to /Nim'
  AssertLinter 'nimlsp', ale#Escape('nimlsp') . ' ' . ale#Escape('/path/to /Nim')