feat: set default state to Inactive, optional title/text with defaults, auto-raise ClassifiedAdCreated

domain/marketplace/classified_ad.py

@@ -9,6 +9,7 @@ from domain.marketplace.classified_ad_state import ClassifiedAdState
 from domain.marketplace.classified_ad_text import ClassifiedAdText
 from domain.marketplace.classified_ad_title import ClassifiedAdTitle
 from domain.marketplace.domain_event import (
+    ClassifiedAdCreated,
     ClassifiedAdPriceUpdated,
     ClassifiedAdSentForReview,
     ClassifiedAdTextUpdated,
@@ -26,12 +27,18 @@ from domain.marketplace.user_id import UserId
 class ClassifiedAd(Entity):
     id: ClassifiedAdId
     _ownerId: UserId
-    title: ClassifiedAdTitle
-    text: ClassifiedAdText
+    title: ClassifiedAdTitle = field(default_factory=lambda: ClassifiedAdTitle(title=""))
+    text: ClassifiedAdText = field(default_factory=lambda: ClassifiedAdText(text=""))
     price: Price = field(default_factory=lambda: Price(amount=Decimal("0.00")))
-    state: ClassifiedAdState | None = None
+    state: ClassifiedAdState = ClassifiedAdState.Inactive
     _events: tuple[DomainEvent, ...] = ()
 
+    def __post_init__(self):
+        if not self._events:
+            object.__setattr__(self, '_events', (
+                ClassifiedAdCreated(id=self.id.value, owner_id=self._ownerId.value),
+            ))
+
     def _ensure_valid_state(self):
         errors = []
         if not self.title.title:

tests/test_classified_ad.py

@@ -10,6 +10,7 @@ from domain.marketplace.classified_ad_state import ClassifiedAdState
 from domain.marketplace.classified_ad_text import ClassifiedAdText
 from domain.marketplace.classified_ad_title import ClassifiedAdTitle
 from domain.marketplace.domain_event import (
+    ClassifiedAdCreated,
     ClassifiedAdPriceUpdated,
     ClassifiedAdSentForReview,
     ClassifiedAdTextUpdated,
@@ -154,10 +155,10 @@ def test_request_to_publish_sets_state_to_pending_review():
     assert published.state == ClassifiedAdState.PendingReview
 
     changes = published.get_changes()
-    assert len(changes) == 1
-    event = changes[0]
-    assert isinstance(event, ClassifiedAdSentForReview)
-    assert event.id == ad.id.value
+    assert len(changes) == 2
+    assert isinstance(changes[0], ClassifiedAdCreated)
+    assert isinstance(changes[1], ClassifiedAdSentForReview)
+    assert changes[1].id == ad.id.value
 
 
 def test_request_to_publish_fails_when_title_empty():
@@ -231,7 +232,8 @@ def test_request_to_publish_does_not_mutate_original():
 
     ad.request_to_publish()
 
-    assert ad.state is None
+    assert ad.state == ClassifiedAdState.Inactive
+    assert ad is not ad.request_to_publish()
 
 
 def test_classified_ad_is_instance_of_entity():
@@ -258,8 +260,9 @@ def test_classified_ad_can_use_entity_raise_event():
 
     updated_ad = ad.raise_event(event)
 
-    assert updated_ad.get_changes() == (event,)
-    assert ad.get_changes() == ()
+    assert updated_ad.get_changes() == (ad.get_changes()[0], event)
+    assert len(ad.get_changes()) == 1
+    assert isinstance(ad.get_changes()[0], ClassifiedAdCreated)
 
 
 def test_set_title_updates_title():
@@ -326,11 +329,11 @@ def test_set_title_raises_classified_ad_title_changed_event():
     updated = ad.set_title(ClassifiedAdTitle(title="New Title"))
 
     changes = updated.get_changes()
-    assert len(changes) == 1
-    event = changes[0]
-    assert isinstance(event, ClassifiedAdTitleChanged)
-    assert event.id == ad.id.value
-    assert event.title == "New Title"
+    assert len(changes) == 2
+    assert isinstance(changes[0], ClassifiedAdCreated)
+    assert isinstance(changes[1], ClassifiedAdTitleChanged)
+    assert changes[1].id == ad.id.value
+    assert changes[1].title == "New Title"
 
 
 def test_update_text_updates_text():
@@ -376,11 +379,11 @@ def test_update_text_raises_classified_ad_text_updated_event():
     updated = ad.update_text(ClassifiedAdText(text="New text"))
 
     changes = updated.get_changes()
-    assert len(changes) == 1
-    event = changes[0]
-    assert isinstance(event, ClassifiedAdTextUpdated)
-    assert event.id == ad.id.value
-    assert event.ad_text == "New text"
+    assert len(changes) == 2
+    assert isinstance(changes[0], ClassifiedAdCreated)
+    assert isinstance(changes[1], ClassifiedAdTextUpdated)
+    assert changes[1].id == ad.id.value
+    assert changes[1].ad_text == "New text"
 
 
 def test_update_price_updates_price():
@@ -426,8 +429,8 @@ def test_update_price_raises_classified_ad_price_updated_event():
     updated = ad.update_price(Price(amount=Decimal("25.00")))
 
     changes = updated.get_changes()
-    assert len(changes) == 1
-    event = changes[0]
-    assert isinstance(event, ClassifiedAdPriceUpdated)
-    assert event.id == ad.id.value
-    assert event.price == Decimal("25.00")
+    assert len(changes) == 2
+    assert isinstance(changes[0], ClassifiedAdCreated)
+    assert isinstance(changes[1], ClassifiedAdPriceUpdated)
+    assert changes[1].id == ad.id.value
+    assert changes[1].price == Decimal("25.00")