From 035cfdf4fcb1bbcb4ad31df6c3414b9036c408f2 Mon Sep 17 00:00:00 2001
From: Paul de Raaij <paul@paulderaaij.nl>
Date: Wed, 29 Jul 2026 02:14:24 -0400
Subject: [PATCH] feat: add UpdateText and UpdatePrice to ClassifiedAd with
 domain events

---
 domain/marketplace/classified_ad.py |  16 +++++
 tests/test_classified_ad.py         | 102 ++++++++++++++++++++++++++++
 2 files changed, 118 insertions(+)

diff --git a/domain/marketplace/classified_ad.py b/domain/marketplace/classified_ad.py
index e84ff8f..babb5f8 100644
--- a/domain/marketplace/classified_ad.py
+++ b/domain/marketplace/classified_ad.py
@@ -9,6 +9,8 @@ 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 (
+    ClassifiedAdPriceUpdated,
+    ClassifiedAdTextUpdated,
     ClassifiedAdTitleChanged,
     DomainEvent,
 )
@@ -54,3 +56,17 @@ class ClassifiedAd(Entity):
         return updated.raise_event(
             ClassifiedAdTitleChanged(id=self.id.value, title=title.title)
         )
+
+    def update_text(self, text: ClassifiedAdText) -> ClassifiedAd:
+        updated = replace(self, text=text)
+        updated._ensure_valid_state()
+        return updated.raise_event(
+            ClassifiedAdTextUpdated(id=self.id.value, ad_text=text.text)
+        )
+
+    def update_price(self, price: Price) -> ClassifiedAd:
+        updated = replace(self, price=price)
+        updated._ensure_valid_state()
+        return updated.raise_event(
+            ClassifiedAdPriceUpdated(id=self.id.value, price=price.amount)
+        )
diff --git a/tests/test_classified_ad.py b/tests/test_classified_ad.py
index 9220121..293e16e 100644
--- a/tests/test_classified_ad.py
+++ b/tests/test_classified_ad.py
@@ -10,7 +10,9 @@ 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 (
+    ClassifiedAdPriceUpdated,
     ClassifiedAdSentForReview,
+    ClassifiedAdTextUpdated,
     ClassifiedAdTitleChanged,
 )
 from domain.marketplace.invalid_entity_state_exception import (
@@ -323,3 +325,103 @@ def test_set_title_raises_classified_ad_title_changed_event():
     assert isinstance(event, ClassifiedAdTitleChanged)
     assert event.id == ad.id.value
     assert event.title == "New Title"
+
+
+def test_update_text_updates_text():
+    ad = ClassifiedAd(
+        id=ClassifiedAdId(value=uuid4()),
+        _ownerId=UserId(value=uuid4()),
+        title=ClassifiedAdTitle(title="Title"),
+        text=ClassifiedAdText(text="Old text"),
+        price=Price(amount=Decimal("10.00")),
+    )
+    new_text = ClassifiedAdText(text="New text")
+
+    updated = ad.update_text(new_text)
+
+    assert updated.text == new_text
+    assert ad.text == ClassifiedAdText(text="Old text")
+
+
+def test_update_text_fails_when_new_text_empty():
+    ad = ClassifiedAd(
+        id=ClassifiedAdId(value=uuid4()),
+        _ownerId=UserId(value=uuid4()),
+        title=ClassifiedAdTitle(title="Title"),
+        text=ClassifiedAdText(text="Text"),
+        price=Price(amount=Decimal("10.00")),
+    )
+
+    with pytest.raises(InvalidEntityStateException) as exc_info:
+        ad.update_text(ClassifiedAdText(text=""))
+
+    assert "text" in str(exc_info.value)
+
+
+def test_update_text_raises_classified_ad_text_updated_event():
+    ad = ClassifiedAd(
+        id=ClassifiedAdId(value=uuid4()),
+        _ownerId=UserId(value=uuid4()),
+        title=ClassifiedAdTitle(title="Title"),
+        text=ClassifiedAdText(text="Old text"),
+        price=Price(amount=Decimal("10.00")),
+    )
+
+    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"
+
+
+def test_update_price_updates_price():
+    ad = ClassifiedAd(
+        id=ClassifiedAdId(value=uuid4()),
+        _ownerId=UserId(value=uuid4()),
+        title=ClassifiedAdTitle(title="Title"),
+        text=ClassifiedAdText(text="Text"),
+        price=Price(amount=Decimal("10.00")),
+    )
+    new_price = Price(amount=Decimal("25.00"))
+
+    updated = ad.update_price(new_price)
+
+    assert updated.price == new_price
+    assert ad.price == Price(amount=Decimal("10.00"))
+
+
+def test_update_price_fails_when_price_zero():
+    ad = ClassifiedAd(
+        id=ClassifiedAdId(value=uuid4()),
+        _ownerId=UserId(value=uuid4()),
+        title=ClassifiedAdTitle(title="Title"),
+        text=ClassifiedAdText(text="Text"),
+        price=Price(amount=Decimal("10.00")),
+    )
+
+    with pytest.raises(InvalidEntityStateException) as exc_info:
+        ad.update_price(Price(amount=Decimal("0.00")))
+
+    assert "price" in str(exc_info.value)
+
+
+def test_update_price_raises_classified_ad_price_updated_event():
+    ad = ClassifiedAd(
+        id=ClassifiedAdId(value=uuid4()),
+        _ownerId=UserId(value=uuid4()),
+        title=ClassifiedAdTitle(title="Title"),
+        text=ClassifiedAdText(text="Text"),
+        price=Price(amount=Decimal("10.00")),
+    )
+
+    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")