# Path: penman/tree.py
# class Tree:
#     def __init__(self,
#                  node: Node,
#                  metadata: Mapping[str, str] = None):
#     def __eq__(self, other) -> bool:
#     def __repr__(self) -> str:
#     def __str__(self) -> str:
#     def nodes(self) -> List[Node]:
#     def walk(self) -> Iterator[_Step]:
#     def reset_variables(self, fmt='{prefix}{j}') -> None:
# def _format(node: Node, level: int) -> str:
# def _format_branch(branch: Branch, level: int) -> str:
# def _nodes(node: Node) -> List[Node]:
# def _walk(node: Node, path: Tuple[int, ...]) -> Iterator[_Step]:
# def _default_variable_prefix(concept: Any) -> Variable:
# def _map_vars(node, varmap):
# def is_atomic(x) -> bool:


import pytest
from penman import tree
                  (':ARG0', ('b', [('/', 'b')]))])


class TestTree:
    def test__init__(self, empty_node, simple_node):
        with pytest.raises(TypeError):
            tree.Tree()

        t = tree.Tree(empty_node)
        assert t.node == empty_node
        assert t.metadata == {}

        t = tree.Tree(simple_node, metadata={'snt': 'Alpha.'})
        assert t.node == simple_node
        assert t.metadata == {'snt': 'Alpha.'}

    def test_nodes(self, one_arg_node, reentrant):
        t = tree.Tree(one_arg_node)
        assert t.nodes() == [one_arg_node, ('b', [('/', 'beta')])]

        t = tree.Tree(reentrant)
        assert t.nodes() == [reentrant,
                             ('b', [('/', 'beta')]),
                             ('g', [('/', 'gamma'), (':ARG0', 'b')])]

    def test_walk(self, one_arg_node, reentrant):
        t = tree.Tree(one_arg_node)
        assert list(t.walk()) == [
            ((0,), ('/', 'alpha')),
            ((1,), (':ARG0', ('b', [('/', 'beta')]))),

# Path: penman/tree.py
# class Tree:
#     def __init__(self,
#                  node: Node,
#                  metadata: Mapping[str, str] = None):
#     def __eq__(self, other) -> bool:
#     def __repr__(self) -> str:
#     def __str__(self) -> str:
#     def nodes(self) -> List[Node]:
#     def walk(self) -> Iterator[_Step]:
#     def reset_variables(self, fmt='{prefix}{j}') -> None:
# def _format(node: Node, level: int) -> str:
# def _format_branch(branch: Branch, level: int) -> str:
# def _nodes(node: Node) -> List[Node]:
# def _walk(node: Node, path: Tuple[int, ...]) -> Iterator[_Step]:
# def _default_variable_prefix(concept: Any) -> Variable:
# def _map_vars(node, varmap):
# def is_atomic(x) -> bool:


# Path: tests/test_tree.py
import pytest
from penman import tree

                  (':ARG0', ('b', [('/', 'b')]))])


class TestTree:
    def test__init__(self, empty_node, simple_node):
        with pytest.raises(TypeError):
            tree.Tree()

        t = tree.Tree(empty_node)
        assert t.node == empty_node
        assert t.metadata == {}

        t = tree.Tree(simple_node, metadata={'snt': 'Alpha.'})
        assert t.node == simple_node
        assert t.metadata == {'snt': 'Alpha.'}

    def test_nodes(self, one_arg_node, reentrant):
        t = tree.Tree(one_arg_node)
        assert t.nodes() == [one_arg_node, ('b', [('/', 'beta')])]

        t = tree.Tree(reentrant)
        assert t.nodes() == [reentrant,
                             ('b', [('/', 'beta')]),
                             ('g', [('/', 'gamma'), (':ARG0', 'b')])]

    def test_walk(self, one_arg_node, reentrant):
        t = tree.Tree(one_arg_node)
        assert list(t.walk()) == [
            ((0,), ('/', 'alpha')),
            ((1,), (':ARG0', ('b', [('/', 'beta')]))),

            ((1, 0), ('/', 'beta')),