def consume(tree, parent, includes, excludes, substitutes):
if is_node(tree, 'includes'):
dfs(tree['includes'], parent, includes,
lambda ref, v: to_forward_ref(ref))
if is_node(tree, 'excludes'):
dfs(tree['excludes'], parent, excludes,
lambda ref, v: ref)
if is_node(tree, 'substitutes'):
dfs(tree['substitutes'], parent, substitutes,
lambda ref, v: u'{0}={1}'.format(ref, shell_escape(v)))
def test_shell_escape(self):
"""Tests the utils.shell_escape function"""
self.assertEqual("'*'", utils.shell_escape('*'))
self.assertEqual("\"'*'\"", utils.shell_escape("'*'"))
self.assertEqual('1', utils.shell_escape(1))
