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"""Tests for dataclass parameter options (frozen, keyword_only)."""
from __future__ import annotations
from datamodel_code_generator.model.dataclass import DataClass, DataModelField
from datamodel_code_generator.reference import Reference
from datamodel_code_generator.types import DataType
def test_dataclass_without_frozen() -> None:
"""Test dataclass generation without frozen parameter."""
reference = Reference(path="TestModel", name="TestModel")
field = DataModelField(
name="field1",
data_type=DataType(type="str"),
required=True,
)
dataclass = DataClass(
reference=reference,
fields=[field],
frozen=False,
)
rendered = dataclass.render()
assert "@dataclass" in rendered
assert "frozen=True" not in rendered
assert "class TestModel:" in rendered
def test_dataclass_with_frozen() -> None:
"""Test dataclass generation with frozen=True."""
reference = Reference(path="TestModel", name="TestModel")
field = DataModelField(
name="field1",
data_type=DataType(type="str"),
required=True,
)
dataclass = DataClass(
reference=reference,
fields=[field],
frozen=True,
)
rendered = dataclass.render()
assert "@dataclass(frozen=True)" in rendered
assert "class TestModel:" in rendered
def test_dataclass_with_keyword_only_and_frozen() -> None:
"""Test dataclass generation with both keyword_only and frozen parameters."""
reference = Reference(path="TestModel", name="TestModel")
field = DataModelField(
name="field1",
data_type=DataType(type="str"),
required=True,
)
dataclass = DataClass(
reference=reference,
fields=[field],
keyword_only=True,
frozen=True,
)
rendered = dataclass.render()
assert "@dataclass" in rendered
assert "kw_only=True" in rendered
assert "frozen=True" in rendered
assert "class TestModel:" in rendered
def test_dataclass_with_only_keyword_only() -> None:
"""Test dataclass generation with only keyword_only parameter."""
reference = Reference(path="TestModel", name="TestModel")
field = DataModelField(
name="field1",
data_type=DataType(type="str"),
required=True,
)
dataclass = DataClass(
reference=reference,
fields=[field],
keyword_only=True,
frozen=False,
)
rendered = dataclass.render()
assert "@dataclass" in rendered
assert "kw_only=True" in rendered
assert "frozen=True" not in rendered
assert "class TestModel:" in rendered
def test_dataclass_frozen_attribute() -> None:
"""Test that frozen attribute is properly stored."""
reference = Reference(path="TestModel", name="TestModel")
dataclass = DataClass(
reference=reference,
fields=[],
frozen=True,
)
assert dataclass.frozen is True
def test_dataclass_frozen_false_attribute() -> None:
"""Test that frozen attribute defaults to False."""
reference = Reference(path="TestModel", name="TestModel")
dataclass = DataClass(
reference=reference,
fields=[],
)
assert dataclass.frozen is False
def test_dataclass_kw_only_true_only() -> None:
"""Test dataclass generation with kw_only=True only (comprehensive test)."""
reference = Reference(path="TestModel", name="TestModel")
field1 = DataModelField(
name="field1",
data_type=DataType(type="str"),
required=True,
)
field2 = DataModelField(
name="field2",
data_type=DataType(type="int"),
required=False,
)
dataclass = DataClass(
reference=reference,
fields=[field1, field2],
keyword_only=True,
)
rendered = dataclass.render()
# Should have @dataclass(kw_only=True) but not frozen=True
assert "@dataclass(kw_only=True)" in rendered
assert "frozen=True" not in rendered
assert "class TestModel:" in rendered
# Verify frozen attribute is False (default)
assert dataclass.frozen is False
assert dataclass.keyword_only is True
def test_dataclass_legacy_keyword_only() -> None:
"""Test that legacy 'frozen' argument is supported if dataclass_arguments is not set."""
reference = Reference(path="TestModel", name="TestModel")
field = DataModelField(
name="field1",
data_type=DataType(type="str"),
required=True,
)
dataclass = DataClass(
reference=reference,
fields=[field],
keyword_only=True,
)
rendered = dataclass.render()
assert "@dataclass(kw_only=True)" in rendered
def test_dataclass_legacy_frozen() -> None:
"""Test that legacy 'frozen' argument is supported if dataclass_arguments is not set."""
reference = Reference(path="TestModel", name="TestModel")
field = DataModelField(
name="field1",
data_type=DataType(type="str"),
required=True,
)
dataclass = DataClass(
reference=reference,
fields=[field],
frozen=True,
)
rendered = dataclass.render()
assert "@dataclass(frozen=True)" in rendered
def test_dataclass_with_custom_dataclass_arguments() -> None:
"""Test that custom dataclass_arguments are rendered correctly."""
reference = Reference(path="TestModel", name="TestModel")
field = DataModelField(
name="field1",
data_type=DataType(type="str"),
required=True,
)
dataclass = DataClass(
reference=reference,
fields=[field],
dataclass_arguments={"slots": True, "repr": False, "order": True},
)
rendered = dataclass.render()
assert "@dataclass(slots=True, order=True)" in rendered
assert "repr=False" not in rendered
def test_dataclass_both_legacy_and_dataclass_arguments() -> None:
"""Test that dataclass_arguments take precedence over legacy flags."""
reference = Reference(path="TestModel", name="TestModel")
field = DataModelField(
name="field1",
data_type=DataType(type="str"),
required=True,
)
dataclass = DataClass(
reference=reference,
fields=[field],
frozen=True, # legacy flag
keyword_only=True, # legacy flag
dataclass_arguments={"frozen": False, "order": True},
)
rendered = dataclass.render()
assert "@dataclass(order=True)" in rendered
assert "@dataclass(frozen=False)" not in rendered
assert "@dataclass(frozen=True)" not in rendered
assert "@dataclass(kw_only=False)" not in rendered
assert "@dataclass(kw_only=True)" not in rendered
|
