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capnpc-py/tests/schemas/test_stubs.py
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"""Verify generated .pyi stubs are consistent with pycapnp runtime.
Test file lives alongside the ``.capnp`` schemas + generated ``.pyi``
stubs. pycapnp's import hook handles runtime loading.
basedpyright type-checks this file together with the project.
"""
from __future__ import annotations
import sys
from pathlib import Path
# Ensure this directory is importable
_HERE = Path(__file__).parent
if str(_HERE) not in sys.path:
sys.path.insert(0, str(_HERE))
import capnp # pyright: ignore[reportMissingTypeStubs] # activates import hook
import test_generics_capnp
import test_interface_capnp
import test_nested_capnp
import test_simple_capnp
class TestSimpleStub:
"""test_simple.capnp — basic struct."""
def test_new_message(self) -> None:
p = test_simple_capnp.Person.new_message(
name="Alice", age=30, email="alice@example.com"
)
assert p.name == "Alice"
assert p.age == 30
def test_field_assignment(self) -> None:
p = test_simple_capnp.Person.new_message()
p.name = "Bob"
p.age = 25
assert p.name == "Bob"
def test_to_dict(self) -> None:
p = test_simple_capnp.Person.new_message(name="Carol", age=28)
d = p.to_dict()
assert d["name"] == "Carol"
def test_from_dict(self) -> None:
p = test_simple_capnp.Person.new_message()
_ = p.from_dict({"name": "Dave", "age": 35})
assert p.name == "Dave"
def test_serialize_roundtrip(self) -> None:
p = test_simple_capnp.Person.new_message(name="Eve", age=22)
data = p.to_bytes()
p2 = test_simple_capnp.Person.from_bytes(data)
assert p2 is not None
class TestNestedStub:
"""test_nested.capnp — nested types + lists."""
def test_nested_message(self) -> None:
ab = test_nested_capnp.AddressBook.new_message()
assert ab.people is not None
class TestGenericsStub:
"""test_generics.capnp — generic structs."""
def test_holder_loads(self) -> None:
c = test_generics_capnp.Container.new_message()
assert c is not None
class TestInterfaceStub:
"""test_interface.capnp — interfaces + method params."""
def test_calcserver_loads(self) -> None:
cs = test_interface_capnp.CalcServer.new_message()
assert cs is not None
class TestAddressBookStub:
"""addressbook.capnp — classic example."""
def test_person_new_message(self) -> None:
import addressbook_capnp
p = addressbook_capnp.Person.new_message(
name="Alice", email="alice@example.com"
)
assert p.name == "Alice"
def test_addressbook_new_message(self) -> None:
import addressbook_capnp
ab = addressbook_capnp.AddressBook.new_message()
assert ab.people is not None
class TestDummyStub:
"""dummy.capnp — comprehensive test schema."""
def test_all_types_loads(self) -> None:
from pathlib import Path
parser = capnp.SchemaParser() # pyright: ignore[reportAttributeAccessIssue]
m = parser.load(str(Path(__file__).parent / "dummy.capnp"))
msg = m.TestAllTypes.new_message(textField="hello", int32Field=42)
assert msg.textField == "hello"
def test_unions(self) -> None:
from pathlib import Path
parser = capnp.SchemaParser() # pyright: ignore[reportAttributeAccessIssue]
m = parser.load(str(Path(__file__).parent / "dummy.capnp"))
u = m.TestUnion.new_message()
assert u is not None
# Note: multi/consumer.capnp cross-file import test skipped —
# pycapnp's SchemaParser crashes when resolving annotation imports
# across schema files. The .pyi stubs are still generated and kept.