do not clear BrowseTheWebSynchronously.playwright on forget.

screenpy_playwright/abilities/browse_the_web_synchronously.py

@@ -7,13 +7,8 @@
 from playwright.sync_api import sync_playwright
 
 if TYPE_CHECKING:
-    from typing import TypeVar
-
     from playwright.sync_api import Browser, BrowserContext, Page, Playwright
-
-    SelfBrowseTheWebSynchronously = TypeVar(
-        "SelfBrowseTheWebSynchronously", bound="BrowseTheWebSynchronously"
-    )
+    from typing_extensions import Self
 
 
 class BrowseTheWebSynchronously:
@@ -38,50 +33,47 @@ class BrowseTheWebSynchronously:
 
     @classmethod
     def using(
-        cls: type[SelfBrowseTheWebSynchronously],
+        cls,
         playwright: Playwright,
         browser: Browser | BrowserContext,
-    ) -> SelfBrowseTheWebSynchronously:
+    ) -> Self:
         """Supply a pre-defined Playwright browser to use."""
         cls.playwright = playwright
         return cls(browser)
 
     @classmethod
     def using_firefox(
-        cls: type[SelfBrowseTheWebSynchronously],
-    ) -> SelfBrowseTheWebSynchronously:
+        cls,
+    ) -> Self:
         """Use a synchronous Firefox browser."""
         if cls.playwright is None:
             cls.playwright = sync_playwright().start()
         return cls(cls.playwright.firefox.launch())
 
     @classmethod
     def using_chromium(
-        cls: type[SelfBrowseTheWebSynchronously],
-    ) -> SelfBrowseTheWebSynchronously:
+        cls,
+    ) -> Self:
         """Use a synchronous Chromium (i.e. Chrome, Edge, Opera, etc.) browser."""
         if cls.playwright is None:
             cls.playwright = sync_playwright().start()
         return cls(cls.playwright.chromium.launch())
 
     @classmethod
     def using_webkit(
-        cls: type[SelfBrowseTheWebSynchronously],
+        cls,
     ) -> BrowseTheWebSynchronously:
         """Use a synchronous WebKit (i.e. Safari, etc.) browser."""
         if cls.playwright is None:
             cls.playwright = sync_playwright().start()
         return cls(cls.playwright.webkit.launch())
 
-    def forget(self: SelfBrowseTheWebSynchronously) -> None:
+    def forget(self: Self) -> None:
         """Forget everything you knew about being a playwright."""
         self.browser.close()
-        if self.playwright:
-            self.playwright.stop()
-        self.__class__.playwright = None
 
     def __init__(
-        self: SelfBrowseTheWebSynchronously,
+        self,
         browser: Browser | BrowserContext,
     ) -> None:
         self.browser = browser

tests/test_abilities.py

@@ -56,3 +56,12 @@ def test_can_have_separate_instance_attribute(self) -> None:
         assert mock_playwright.chromium.launch.call_count == 1
         assert mock_playwright.firefox.launch.call_count == 1
         assert mock_playwright.webkit.launch.call_count == 1
+
+    def test_forget_does_not_clear_playwright(self) -> None:
+        mock_playwright, mock_browser = get_mocked_playwright_and_browser()
+        btws = BrowseTheWebSynchronously.using(mock_playwright, mock_browser)
+
+        btws.forget()
+
+        assert BrowseTheWebSynchronously.playwright is mock_playwright
+        assert mock_browser.close.call_count == 1