[3/17] Add tests to entities

CHANGELOG.md

@@ -1,6 +1,12 @@
 # Changelog
 
-###  40.0.2 [#1186](https://github.com/openfisca/openfisca-core/pull/1186)
+### 41.1.2 [#1192](https://github.com/openfisca/openfisca-core/pull/1192)
+
+#### Technical changes
+
+- Add tests to `entities`.
+
+###  41.1.1 [#1186](https://github.com/openfisca/openfisca-core/pull/1186)
 
 #### Technical changes
 

openfisca_core/entities/__init__.py

@@ -21,7 +21,10 @@
 #
 # See: https://www.python.org/dev/peps/pep-0008/#imports
 
-from .entity import Entity  # noqa: F401
-from .group_entity import GroupEntity  # noqa: F401
-from .helpers import build_entity  # noqa: F401
-from .role import Role  # noqa: F401
+from . import typing
+from .entity import Entity
+from .group_entity import GroupEntity
+from .helpers import build_entity
+from .role import Role
+
+__all__ = ["Entity", "GroupEntity", "Role", "build_entity", "typing"]

openfisca_core/entities/entity.py

@@ -12,7 +12,7 @@ class Entity:
     Represents an entity (e.g. a person, a household, etc.) on which calculations can be run.
     """
 
-    def __init__(self, key, plural, label, doc):
+    def __init__(self, key: str, plural: str, label: str, doc: str) -> None:
         self.key = key
         self.label = label
         self.plural = plural
@@ -25,7 +25,7 @@ def set_tax_benefit_system(self, tax_benefit_system: TaxBenefitSystem):
 
     def check_role_validity(self, role: Any) -> None:
         if role is not None and not isinstance(role, Role):
-            raise ValueError("{} is not a valid role".format(role))
+            raise ValueError(f"{role} is not a valid role")
 
     def get_variable(
         self,
@@ -44,16 +44,11 @@ def check_variable_defined_for_entity(self, variable_name: str) -> None:
             entity = variable.entity
 
         if entity.key != self.key:
-            message = os.linesep.join(
-                [
-                    "You tried to compute the variable '{0}' for the entity '{1}';".format(
-                        variable_name, self.plural
-                    ),
-                    "however the variable '{0}' is defined for '{1}'.".format(
-                        variable_name, entity.plural
-                    ),
-                    "Learn more about entities in our documentation:",
-                    "<https://openfisca.org/doc/coding-the-legislation/50_entities.html>.",
-                ]
+            message = (
+                f"You tried to compute the variable '{variable_name}' for",
+                f"the entity '{self.plural}'; however the variable",
+                f"'{variable_name}' is defined for '{entity.plural}'.",
+                "Learn more about entities in our documentation:",
+                "<https://openfisca.org/doc/coding-the-legislation/50_entities.html>.",
             )
-            raise ValueError(message)
+            raise ValueError(os.linesep.join(message))

openfisca_core/entities/group_entity.py

@@ -1,3 +1,8 @@
+from collections.abc import Iterable, Mapping
+from typing import Any
+
+from itertools import chain
+
 from .entity import Entity
 from .role import Role
 
@@ -18,13 +23,17 @@ class GroupEntity(Entity):
         containing_entities: The list of keys of group entities whose members
             are guaranteed to be a superset of this group's entities.
 
-    .. versionchanged:: 35.7.0
-        Added ``containing_entities``, that allows the defining of group
-        entities which entirely contain other group entities.
-
     """  # noqa RST301
 
-    def __init__(self, key, plural, label, doc, roles, containing_entities=()):
+    def __init__(
+        self,
+        key: str,
+        plural: str,
+        label: str,
+        doc: str,
+        roles: Iterable[Mapping[str, Any]],
+        containing_entities: Iterable[str] = (),
+    ) -> None:
         super().__init__(key, plural, label, doc)
         self.roles_description = roles
         self.roles = []
@@ -39,8 +48,9 @@ def __init__(self, key, plural, label, doc, roles, containing_entities=()):
                     setattr(self, subrole.key.upper(), subrole)
                     role.subroles.append(subrole)
                 role.max = len(role.subroles)
-        self.flattened_roles = sum(
-            [role2.subroles or [role2] for role2 in self.roles], []
+        self.flattened_roles = tuple(
+            chain.from_iterable(role.subroles or [role] for role in self.roles)
         )
+
         self.is_person = False
         self.containing_entities = containing_entities

openfisca_core/entities/helpers.py

@@ -1,4 +1,5 @@
-from openfisca_core import entities
+from .entity import Entity
+from .group_entity import GroupEntity
 
 
 def build_entity(
@@ -12,8 +13,8 @@ def build_entity(
     containing_entities=(),
 ):
     if is_person:
-        return entities.Entity(key, plural, label, doc)
+        return Entity(key, plural, label, doc)
     else:
-        return entities.GroupEntity(
+        return GroupEntity(
             key, plural, label, doc, roles, containing_entities=containing_entities
         )

openfisca_core/entities/role.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from collections.abc import Mapping, Sequence
 from typing import Any
 
 import dataclasses
@@ -17,11 +18,8 @@ class Role:
     several dependents, and the like.
 
     Attributes:
-        entity (Entity): The Entity to which the Role belongs.
-        key (str): A key to identify the Role.
-        plural (str): The ``key``, pluralised.
-        label (str): A summary description.
-        doc (str): A full description, dedented.
+        entity (Entity): The Entity the Role belongs to.
+        description (_Description): A description of the Role.
         max (int): Max number of members.
         subroles (list[Role]): A list of subroles.
 
@@ -49,48 +47,80 @@ class Role:
 
     """
 
-    def __init__(self, description: dict[str, Any], entity: Entity) -> None:
-        role_description: _RoleDescription = _RoleDescription(**description)
-        self.entity: Entity = entity
-        self.key: str = role_description.key
-        self.plural: str | None = role_description.plural
-        self.label: str | None = role_description.label
-        self.doc: str = role_description.doc
-        self.max: int | None = role_description.max
-        self.subroles: list[Role] | None = None
+    #: The Entity the Role belongs to.
+    entity: Entity
+
+    #: A description of the Role.
+    description: _Description
+
+    #: Max number of members.
+    max: int | None = None
+
+    #: A list of subroles.
+    subroles: Sequence[Role] | None = None
+
+    @property
+    def key(self) -> str:
+        """A key to identify the Role."""
+        return self.description.key
+
+    @property
+    def plural(self) -> str | None:
+        """The ``key``, pluralised."""
+        return self.description.plural
+
+    @property
+    def label(self) -> str | None:
+        """A summary description."""
+        return self.description.label
+
+    @property
+    def doc(self) -> str | None:
+        """A full description, non-indented."""
+        return self.description.doc
+
+    def __init__(self, description: Mapping[str, Any], entity: Entity) -> None:
+        self.description = _Description(
+            **{
+                key: value
+                for key, value in description.items()
+                if key in {"key", "plural", "label", "doc"}
+            }
+        )
+        self.entity = entity
+        self.max = description.get("max")
 
     def __repr__(self) -> str:
         return f"Role({self.key})"
 
 
 @dataclasses.dataclass(frozen=True)
-class _RoleDescription:
+class _Description:
     """A Role's description.
 
     Examples:
-        >>> description = {
+        >>> data = {
         ...     "key": "parent",
         ...     "label": "Parents",
         ...     "plural": "parents",
         ...     "doc": "\t\t\tThe one/two adults in charge of the household.",
-        ...     "max": 2,
         ... }
 
-        >>> role_description = _RoleDescription(**description)
+        >>> description = _Description(**data)
 
-        >>> repr(_RoleDescription)
-        "<class 'openfisca_core.entities.role._RoleDescription'>"
+        >>> repr(_Description)
+        "<class 'openfisca_core.entities.role._Description'>"
 
-        >>> repr(role_description)
-        "_RoleDescription(key='parent', plural='parents', label='Parents',...)"
+        >>> repr(description)
+        "_Description(key='parent', plural='parents', label='Parents', ...)"
 
-        >>> str(role_description)
-        "_RoleDescription(key='parent', plural='parents', label='Parents',...)"
+        >>> str(description)
+        "_Description(key='parent', plural='parents', label='Parents', ...)"
 
-        >>> {role_description}
-        {...}
+        >>> {description}
+        {_Description(key='parent', plural='parents', label='Parents', doc=...}
 
-        >>> role_description.key
+        >>> description.key
         'parent'
 
     .. versionadded:: 41.0.1
@@ -107,13 +137,8 @@ class _RoleDescription:
     label: str | None = None
 
     #: A full description, non-indented.
-    doc: str = ""
-
-    #: Max number of members.
-    max: int | None = None
-
-    #: A list of subroles.
-    subroles: list[str] | None = None
+    doc: str | None = None
 
     def __post_init__(self) -> None:
-        object.__setattr__(self, "doc", textwrap.dedent(self.doc))
+        if self.doc is not None:
+            object.__setattr__(self, "doc", textwrap.dedent(self.doc))

openfisca_core/entities/tests/test_entity.py

@@ -0,0 +1,11 @@
+from openfisca_core import entities
+
+
+def test_init_when_doc_indented() -> None:
+    """De-indent the ``doc`` attribute if it is passed at initialisation."""
+
+    key = "\tkey"
+    doc = "\tdoc"
+    entity = entities.Entity(key, "label", "plural", doc)
+    assert entity.key == key
+    assert entity.doc == doc.lstrip()

openfisca_core/entities/tests/test_group_entity.py

@@ -0,0 +1,69 @@
+from collections.abc import Mapping
+from typing import Any
+
+import pytest
+
+from openfisca_core import entities
+
+
+@pytest.fixture
+def parent() -> str:
+    return "parent"
+
+
+@pytest.fixture
+def uncle() -> str:
+    return "uncle"
+
+
+@pytest.fixture
+def first_parent() -> str:
+    return "first_parent"
+
+
+@pytest.fixture
+def second_parent() -> str:
+    return "second_parent"
+
+
+@pytest.fixture
+def third_parent() -> str:
+    return "third_parent"
+
+
+@pytest.fixture
+def role(parent: str, first_parent: str, third_parent: str) -> Mapping[str, Any]:
+    return {"key": parent, "subroles": {first_parent, third_parent}}
+
+
+@pytest.fixture
+def group_entity(role: Mapping[str, Any]) -> entities.GroupEntity:
+    return entities.GroupEntity("key", "label", "plural", "doc", (role,))
+
+
+def test_init_when_doc_indented() -> None:
+    """De-indent the ``doc`` attribute if it is passed at initialisation."""
+
+    key = "\tkey"
+    doc = "\tdoc"
+    group_entity = entities.GroupEntity(key, "label", "plural", doc, ())
+    assert group_entity.key == key
+    assert group_entity.doc == doc.lstrip()
+
+
+def test_group_entity_with_roles(
+    group_entity: entities.GroupEntity, parent: str, uncle: str
+) -> None:
+    """Assign a Role for each role-like passed as argument."""
+
+    assert hasattr(group_entity, parent.upper())
+    assert not hasattr(group_entity, uncle.upper())
+
+
+def test_group_entity_with_subroles(
+    group_entity: entities.GroupEntity, first_parent: str, second_parent: str
+) -> None:
+    """Assign a Role for each subrole-like passed as argument."""
+
+    assert hasattr(group_entity, first_parent.upper())
+    assert not hasattr(group_entity, second_parent.upper())

openfisca_core/entities/tests/test_role.py

@@ -0,0 +1,11 @@
+from openfisca_core import entities
+
+
+def test_init_when_doc_indented() -> None:
+    """De-indent the ``doc`` attribute if it is passed at initialisation."""
+
+    key = "\tkey"
+    doc = "\tdoc"
+    role = entities.Role({"key": key, "doc": doc}, object())
+    assert role.key == key
+    assert role.doc == doc.lstrip()

openfisca_core/entities/typing.py

@@ -2,8 +2,4 @@
 
 
 class Entity(Protocol):
-    """Entity protocol.
-
-    .. versionadded:: 41.0.1
-
-    """
+    ...