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|
from dataclasses import dataclass
from typing import Optional
from dataclasses_json import DataClassJsonMixin
@dataclass(frozen=True)
class Tree(DataClassJsonMixin):
value: str
left: Optional['Tree']
right: Optional['Tree']
family_tree_json = """
{
"value": "Boy",
"left": {
"value": "Ma",
"left": {
"value": "Maternal Grandma",
"left": null,
"right": null
},
"right": {
"value": "Maternal Grandpa",
"left": null,
"right": null
}
},
"right": {
"value": "Pa",
"left": {
"value": "Paternal Grandma",
"left": null,
"right": null
},
"right": {
"value": "Paternal Grandpa",
"left": null,
"right": null
}
}
}
""".strip()
family_tree = Tree(
"Boy",
Tree(
"Ma",
Tree(
"Maternal Grandma",
None,
None
),
Tree(
"Maternal Grandpa",
None,
None
)
),
Tree("Pa",
Tree(
"Paternal Grandma",
None,
None
),
Tree(
"Paternal Grandpa",
None,
None
)
)
)
class TestRecursive:
def test_tree_encode(self):
assert family_tree.to_json(indent=4) == family_tree_json
def test_tree_decode(self):
assert Tree.from_json(family_tree_json) == family_tree
def test_tree_schema_round_trip(self):
tree_dict = Tree.schema().dump(family_tree)
tree_obj = Tree.schema().load(tree_dict)
assert tree_obj == family_tree
|
