From ffd72812500b46c111c20f14be7875773f1972f1 Mon Sep 17 00:00:00 2001
From: Fire162 <owner@wegenz.in>
Date: Wed, 14 Oct 2026 14:50:49 +0530
Subject: [PATCH] fix: accept pseudo option in
 LocatorAssertions.not_to_have_css (#3244)

---
 playwright/_impl/_assertions.py    |  3 ++-
 playwright/async_api/_generated.py |  5 ++++-
 playwright/sync_api/_generated.py  |  5 ++++-
 tests/async/test_assertions.py     | 14 ++++++++++++++
 tests/sync/test_assertions.py      | 14 ++++++++++++++
 5 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/playwright/_impl/_assertions.py b/playwright/_impl/_assertions.py
index 44c7c4a9b..9f386cbc7 100644
--- a/playwright/_impl/_assertions.py
+++ b/playwright/_impl/_assertions.py
@@ -505,9 +505,10 @@ async def not_to_have_css(
         name: str,
         value: Union[str, Pattern[str]],
         timeout: float = None,
+        pseudo: Literal["after", "before"] = None,
     ) -> None:
         __tracebackhide__ = True
-        await self._not.to_have_css(name, value, timeout)
+        await self._not.to_have_css(name, value, timeout=timeout, pseudo=pseudo)
 
     async def to_have_id(
         self,
diff --git a/playwright/async_api/_generated.py b/playwright/async_api/_generated.py
index f1c3b2576..14524c3ce 100644
--- a/playwright/async_api/_generated.py
+++ b/playwright/async_api/_generated.py
@@ -14104,6 +14104,7 @@ async def not_to_have_css(
         name: str,
         value: typing.Union[str, typing.Pattern[str]],
         *,
+        pseudo: typing.Optional[Literal["after", "before"]] = None,
         timeout: typing.Optional[typing.Union[float, datetime.timedelta]] = None,
     ) -> None:
         """LocatorAssertions.not_to_have_css
@@ -14116,13 +14117,15 @@ async def not_to_have_css(
             CSS property name.
         value : Union[Pattern[str], str]
             CSS property value.
+        pseudo : Union["after", "before", None]
+            Pseudo-element to read computed styles from.
         timeout : Union[float, None]
             Time to retry the assertion for in milliseconds. Defaults to `5000`.
         """
         __tracebackhide__ = True
 
         await self._impl_obj.not_to_have_css(
-            name=name, value=value, timeout=to_milliseconds(timeout)
+            name=name, value=value, pseudo=pseudo, timeout=to_milliseconds(timeout)
         )
 
     async def not_to_have_id(
diff --git a/playwright/sync_api/_generated.py b/playwright/sync_api/_generated.py
index 013766323..3768d4187 100644
--- a/playwright/sync_api/_generated.py
+++ b/playwright/sync_api/_generated.py
@@ -14178,6 +14178,7 @@ def not_to_have_css(
         name: str,
         value: typing.Union[str, typing.Pattern[str]],
         *,
+        pseudo: typing.Optional[Literal["after", "before"]] = None,
         timeout: typing.Optional[typing.Union[float, datetime.timedelta]] = None,
     ) -> None:
         """LocatorAssertions.not_to_have_css
@@ -14190,6 +14191,8 @@ def not_to_have_css(
             CSS property name.
         value : Union[Pattern[str], str]
             CSS property value.
+        pseudo : Union["after", "before", None]
+            Pseudo-element to read computed styles from.
         timeout : Union[float, None]
             Time to retry the assertion for in milliseconds. Defaults to `5000`.
         """
@@ -14197,7 +14200,7 @@ def not_to_have_css(
 
         self._sync(
             self._impl_obj.not_to_have_css(
-                name=name, value=value, timeout=to_milliseconds(timeout)
+                name=name, value=value, pseudo=pseudo, timeout=to_milliseconds(timeout)
             )
         )
 
diff --git a/tests/async/test_assertions.py b/tests/async/test_assertions.py
index 9c31b12af..381b1e7dd 100644
--- a/tests/async/test_assertions.py
+++ b/tests/async/test_assertions.py
@@ -197,6 +197,20 @@ async def test_assertions_locator_to_have_css(page: Page, server: Server) -> Non
             "color", "rgb(42, 42, 42)", timeout=100
         )
 
+    await page.set_content(
+        "<style>div.foobar::before { content: 'foo'; color: rgb(234, 74, 90); }</style><div class=foobar>kek</div>"
+    )
+    await expect(page.locator("div.foobar")).to_have_css(
+        "color", "rgb(234, 74, 90)", pseudo="before"
+    )
+    await expect(page.locator("div.foobar")).not_to_have_css(
+        "color", "rgb(42, 42, 42)", pseudo="before", timeout=100
+    )
+    with pytest.raises(AssertionError):
+        await expect(page.locator("div.foobar")).not_to_have_css(
+            "color", "rgb(234, 74, 90)", pseudo="before", timeout=100
+        )
+
 
 async def test_assertions_locator_to_have_id(page: Page, server: Server) -> None:
     await page.goto(server.EMPTY_PAGE)
diff --git a/tests/sync/test_assertions.py b/tests/sync/test_assertions.py
index 90cf5a3be..d2eb15b6f 100644
--- a/tests/sync/test_assertions.py
+++ b/tests/sync/test_assertions.py
@@ -180,6 +180,20 @@ def test_assertions_locator_to_have_css(page: Page, server: Server) -> None:
             "color", "rgb(42, 42, 42)", timeout=100
         )
 
+    page.set_content(
+        "<style>div.foobar::before { content: 'foo'; color: rgb(234, 74, 90); }</style><div class=foobar>kek</div>"
+    )
+    expect(page.locator("div.foobar")).to_have_css(
+        "color", "rgb(234, 74, 90)", pseudo="before"
+    )
+    expect(page.locator("div.foobar")).not_to_have_css(
+        "color", "rgb(42, 42, 42)", pseudo="before", timeout=100
+    )
+    with pytest.raises(AssertionError):
+        expect(page.locator("div.foobar")).not_to_have_css(
+            "color", "rgb(234, 74, 90)", pseudo="before", timeout=100
+        )
+
 
 def test_assertions_locator_to_have_id(page: Page, server: Server) -> None:
     page.goto(server.EMPTY_PAGE)