python-bokeh2/bokeh-pr12218-Pillow9.2.patch

From b86d5458cbf6d371013a8ced744b262460005e23 Mon Sep 17 00:00:00 2001
From: Mateusz Paprocki <mattpap@gmail.com>
Date: Wed, 6 Jul 2022 14:59:48 +0200
Subject: [PATCH] Robustify a unit test of Image.transform()

---
 tests/unit/bokeh/core/property/test_visual.py | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/tests/unit/bokeh/core/property/test_visual.py b/tests/unit/bokeh/core/property/test_visual.py
index 3f293642b56..37620d35c1d 100644
--- a/tests/unit/bokeh/core/property/test_visual.py
+++ b/tests/unit/bokeh/core/property/test_visual.py
@@ -21,6 +21,7 @@
 import datetime
 from io import BytesIO
 from pathlib import Path
+from typing import Literal
 
 # External imports
 import numpy as np
@@ -284,12 +285,15 @@ def test_transform_numpy(self) -> None:
         assert prop.transform(data) == expected
 
     @pytest.mark.parametrize('typ', ('png', 'gif', 'tiff'))
-    def test_transform_PIL(self, typ) -> None:
+    def test_transform_PIL(self, typ: Literal["png", "gif", "tiff"]) -> None:
         image = PIL.Image.new("RGBA", size=(50, 50), color=(155, 0, 0))
-        out = BytesIO()
-        image.save(out, typ)
-        value = PIL.Image.open(out)
-        expected = "data:image/%s;base64," % typ + base64.b64encode(out.getvalue()).decode('ascii')
+        out0 = BytesIO()
+        image.save(out0, typ)
+
+        value = PIL.Image.open(out0)
+        out1 = BytesIO()
+        value.save(out1, typ)
+        expected = "data:image/%s;base64," % typ + base64.b64encode(out1.getvalue()).decode('ascii')
 
         prop = bcpv.Image()
         assert prop.transform(value) == expected