Before:
  call ale#assert#SetUpFixerTest('zig', 'zigfmt')

After:
  call ale#assert#TearDownFixerTest()

Execute(The zig callback should return the correct default values):
  AssertFixer {
  \    'command': ale#Escape('zig') . ' fmt %t',
  \    'read_temporary_file': 1,
  \}

Execute(The zig callback should allow custom zig executables):
  let g:ale_zig_zigfmt_executable = 'foo/bar'

  AssertFixer {
  \    'command': ale#Escape('foo/bar') . ' fmt %t',
  \    'read_temporary_file': 1,
  \}

