feat: use ClassifiedAdTitle value object for ClassifiedAd.title

domain/marketplace/__init__.py

@@ -1,5 +1,6 @@
 from .classified_ad import ClassifiedAd as ClassifiedAd
 from .classified_ad_id import ClassifiedAdId as ClassifiedAdId
+from .classified_ad_title import ClassifiedAdTitle as ClassifiedAdTitle
 from .money import Money as Money
 from .price import Price as Price
 from .user_id import UserId as UserId

domain/marketplace/classified_ad.py

@@ -2,6 +2,7 @@ from dataclasses import dataclass, field
 from decimal import Decimal
 
 from domain.marketplace.classified_ad_id import ClassifiedAdId
+from domain.marketplace.classified_ad_title import ClassifiedAdTitle
 from domain.marketplace.price import Price
 from domain.marketplace.user_id import UserId
 
@@ -10,6 +11,6 @@ from domain.marketplace.user_id import UserId
 class ClassifiedAd:
     id: ClassifiedAdId
     _ownerId: UserId
-    title: str
+    title: ClassifiedAdTitle
     text: str
     price: Price = field(default_factory=lambda: Price(amount=Decimal("0.00")))

domain/marketplace/classified_ad_title.py

@@ -0,0 +1,10 @@
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class ClassifiedAdTitle:
+    title: str
+
+    def __post_init__(self):
+        if len(self.title) > 100:
+            raise ValueError(f"Title cannot be longer than 100 characters: {self.title}")

tests/test_classified_ad.py

@@ -5,6 +5,7 @@ import pytest
 
 from domain.marketplace.classified_ad import ClassifiedAd
 from domain.marketplace.classified_ad_id import ClassifiedAdId
+from domain.marketplace.classified_ad_title import ClassifiedAdTitle
 from domain.marketplace.price import Price
 from domain.marketplace.user_id import UserId
 
@@ -16,14 +17,14 @@ def test_classified_ad_creation():
     ad = ClassifiedAd(
         id=ad_id,
         _ownerId=owner_id,
-        title="Test Title",
+        title=ClassifiedAdTitle(title="Test Title"),
         text="Test text content",
         price=Price(amount=Decimal("99.99")),
     )
 
     assert ad.id == ad_id
     assert ad._ownerId == owner_id
-    assert ad.title == "Test Title"
+    assert ad.title == ClassifiedAdTitle(title="Test Title")
     assert ad.text == "Test text content"
     assert ad.price == Price(amount=Decimal("99.99"))
 
@@ -32,7 +33,7 @@ def test_classified_ad_can_not_be_created_without_id():
     with pytest.raises(TypeError):
         ClassifiedAd(
             _ownerId=UserId(value=uuid4()),
-            title="Title",
+            title=ClassifiedAdTitle(title="Title"),
             text="Text",
             price=Price(amount=Decimal("10.00")),
         )
@@ -42,7 +43,7 @@ def test_classified_ad_can_not_be_created_without_owner_id():
     with pytest.raises(TypeError):
         ClassifiedAd(
             id=ClassifiedAdId(value=uuid4()),
-            title="Title",
+            title=ClassifiedAdTitle(title="Title"),
             text="Text",
             price=Price(amount=Decimal("10.00")),
         )
@@ -55,13 +56,13 @@ def test_classified_ad_can_be_created_without_price():
     ad = ClassifiedAd(
         id=ad_id,
         _ownerId=owner_id,
-        title="Test Title",
+        title=ClassifiedAdTitle(title="Test Title"),
         text="Test text content",
     )
 
     assert ad.id == ad_id
     assert ad._ownerId == owner_id
-    assert ad.title == "Test Title"
+    assert ad.title == ClassifiedAdTitle(title="Test Title")
     assert ad.text == "Test text content"
     assert ad.price == Price(amount=Decimal("0.00"))
 
@@ -71,7 +72,7 @@ def test_classified_ad_can_not_have_negative_price():
         ClassifiedAd(
             id=ClassifiedAdId(value=uuid4()),
             _ownerId=UserId(value=uuid4()),
-            title="Title",
+            title=ClassifiedAdTitle(title="Title"),
             text="Text",
             price=Price(amount=Decimal("-10.00")),
         )
@@ -81,7 +82,7 @@ def test_classified_ad_is_immutable():
     ad = ClassifiedAd(
         id=ClassifiedAdId(value=uuid4()),
         _ownerId=UserId(value=uuid4()),
-        title="Title",
+        title=ClassifiedAdTitle(title="Title"),
         text="Text",
         price=Price(amount=Decimal("10.00")),
     )
@@ -100,16 +101,28 @@ def test_classified_ad_equality():
     ad1 = ClassifiedAd(
         id=ad_id,
         _ownerId=owner_id,
-        title="Title",
+        title=ClassifiedAdTitle(title="Title"),
         text="Text",
         price=Price(amount=Decimal("10.00")),
     )
     ad2 = ClassifiedAd(
         id=ad_id,
         _ownerId=owner_id,
-        title="Title",
+        title=ClassifiedAdTitle(title="Title"),
         text="Text",
         price=Price(amount=Decimal("10.00")),
     )
 
     assert ad1 == ad2
+
+
+def test_classified_ad_title_validation():
+    long_title = "a" * 101
+    with pytest.raises(ValueError):
+        ClassifiedAd(
+            id=ClassifiedAdId(value=uuid4()),
+            _ownerId=UserId(value=uuid4()),
+            title=ClassifiedAdTitle(title=long_title),
+            text="Text",
+            price=Price(amount=Decimal("10.00")),
+        )

tests/test_classified_ad_title.py

@@ -0,0 +1,13 @@
+import pytest
+
+from domain.marketplace.classified_ad_title import ClassifiedAdTitle
+
+
+def test_classified_ad_title_creation():
+    title = ClassifiedAdTitle(title="Test Ad")
+
+    assert title.title == "Test Ad"
+
+def test_classified_ad_title_can_not_be_longer_then_100_chars():
+    with pytest.raises(ValueError):
+        ClassifiedAdTitle(title="efbqzzqmsjdlhkovmnmyykrjvlftrzzaefbqzzqmsjdlhkovmnmyykrjvlftrzzaefbqzzqmsjdlhkovmnmyykrjvlftrzzaefbqzzqmsjdlhkovmnmyykrjvlftrzzaefbqzzqmsjdlhkovmnmyykrjvlftrzza")