chore(lib): Remove old validation check preventing loop=True with auto_next=True (#445)

* remove old validation check

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update CHANGELOG.md

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -18,6 +18,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed whitespace issue in default RevealJS template.
   [#442](https://github.com/jeertmans/manim-slides/pull/442)
 
+(unreleased-chore)=
+### Chore
+
+- Removed an old validation check that prevented setting `loop=True` with
+  `auto_next=True` on `next_slide()`
+  [#445](https://github.com/jeertmans/manim-slides/pull/445)
+
 (v5.1.7)=
 ## [v5.1.7](https://github.com/jeertmans/manim-slides/compare/v5.1.6...v5.1.7)
 

manim_slides/config.py

@@ -262,21 +262,6 @@ class PreSlideConfig(BaseSlideConfig):
 
         return pre_slide_config
 
-    @model_validator(mode="after")
-    @classmethod
-    def loop_and_auto_next_disallowed(
-        cls, pre_slide_config: "PreSlideConfig"
-    ) -> "PreSlideConfig":
-        if pre_slide_config.loop and pre_slide_config.auto_next:
-            raise ValueError(
-                "You cannot have both `loop=True` and `auto_next=True`, "
-                "because a looping slide has no ending. "
-                "This may be supported in the future if "
-                "https://github.com/jeertmans/manim-slides/pull/299 gets merged."
-            )
-
-        return pre_slide_config
-
     @property
     def slides_slice(self) -> slice:
         return slice(self.start_animation, self.end_animation)

tests/test_slide.py

@@ -22,7 +22,6 @@ from manim import (
     Text,
 )
 from packaging import version
-from pydantic import ValidationError
 
 from manim_slides.config import PresentationConfig
 from manim_slides.defaults import FOLDER_PATH
@@ -193,7 +192,7 @@ class TestSlide:
             assert not self._base_slide_config.auto_next
 
     @assert_constructs
-    class TestLoopAndAutoNextFails(Slide):
+    class TestLoopAndAutoNextSucceeds(Slide):
         def construct(self) -> None:
             text = Text("Some text")
 
@@ -202,8 +201,7 @@ class TestSlide:
             self.next_slide(loop=True, auto_next=True)
             self.play(text.animate.scale(2))
 
-            with pytest.raises(ValidationError):
+            self.next_slide()
-                self.next_slide()
 
     @assert_constructs
     class TestPlaybackRate(Slide):