def test_transformer_absolute_expression(patch, tree):
"""
Ensures absolute_expression are untouched when they don't contain
just a path
"""
patch.object(Tree, 'follow_node_chain')
tree.follow_node_chain.return_value = None
result = Transformer.absolute_expression([tree])
assert result == Tree('absolute_expression', [tree])
result = Transformer.absolute_expression([tree, tree])
assert result == Tree('absolute_expression', [tree, tree])
def test_transformer_absolute_expression_zero(patch, tree, magic):
"""
Ensures absolute_expression are untouched when they don't contain
just a path
"""
patch.object(Tree, "follow_node_chain")
m = magic()
tree.follow_node_chain.return_value = m
result = Transformer.absolute_expression([tree])
expected = Tree("service_block",
[Tree("service", [m, Tree("service_fragment", [])])])
assert result == expected