python.pkgs.cairocffi: update tests for Cairo 1.15.12

Fixes #41183

pkgs/development/python-modules/cairocffi/cairocffi-0.8.1-cairo-1.15.12.patch

@@ -0,0 +1,24 @@
+diff --git a/cairocffi/test_cairo.py b/cairocffi/test_cairo.py
+index 1588349..5452910 100644
+--- a/cairocffi/test_cairo.py
++++ b/cairocffi/test_cairo.py
+@@ -292,7 +292,8 @@ def test_pdf_surface():
+         pdf_bytes = file_obj.getvalue()
+         assert pdf_bytes.startswith(b'%PDF')
+         assert b'/MediaBox [ 0 0 123 432 ]' in pdf_bytes
+-        assert pdf_bytes.count(b'/Type /Page\n') == 1
++        assert pdf_bytes.count(b'/Type /Pages') == 1
++        assert pdf_bytes.count(b'/Type /Page') == 2
+ 
+     file_obj = io.BytesIO()
+     surface = PDFSurface(file_obj, 1, 1)
+@@ -306,7 +307,8 @@ def test_pdf_surface():
+     assert b'/MediaBox [ 0 0 1 1 ]' not in pdf_bytes
+     assert b'/MediaBox [ 0 0 12 100 ]' in pdf_bytes
+     assert b'/MediaBox [ 0 0 42 700 ]' in pdf_bytes
+-    assert pdf_bytes.count(b'/Type /Page\n') == 2
++    assert pdf_bytes.count(b'/Type /Pages') == 1
++    assert pdf_bytes.count(b'/Type /Page') == 3
+ 
+ 
+ def test_svg_surface():

pkgs/development/python-modules/cairocffi/default.nix

@@ -47,6 +47,7 @@ buildPythonPackage rec {
       gdk_pixbuf = gdk_pixbuf.out;
     })
     ./fix_test_scaled_font.patch
+    ./cairocffi-0.8.1-cairo-1.15.12.patch
   ];
 
   meta = with lib; {