tests/test_2548.py:test_2548(): fixed for mupdf-1.23.x and mupdf-master.

Author: julian-smith-artifex-com

tests/test_2548.py

@@ -9,8 +9,9 @@ def test_2548():
 
     Old MuPDF version did not detect the loop.
     """
+    print(f'test_2548(): {fitz.mupdf_version_tuple=}')
     if fitz.mupdf_version_tuple < (1, 23, 4):
-        print(f'Not testing #2548 because infinite hang before mupdf-1.23.4.')
+        print(f'test_2548(): Not testing #2548 because infinite hang before mupdf-1.23.4.')
         return
     fitz.TOOLS.mupdf_warnings(reset=True)
     doc = fitz.open(f'{root}/tests/resources/test_2548.pdf')
@@ -28,9 +29,13 @@ def test_2548():
                 expected = "RuntimeError('cycle in structure tree')"
             assert repr(ee) == expected, f'Expected {expected=} but got {repr(ee)=}.'
             e = True
-    # After 2023-11-05 mupdf master no longer raises an exception, but does
-    # write a warning.
     wt = fitz.TOOLS.mupdf_warnings()
-    print(f'{wt=}')
-    assert wt == 'structure tree broken, assume tree is missing: cycle in structure tree'
-    assert not e
+    print(f'test_2548(): {wt=}')
+    if fitz.mupdf_version_tuple == (1, 23, 5):
+        assert e
+        assert not wt
+    else:
+        # After 2023-11-05 mupdf master no longer raises an exception, but does
+        # write a warning.
+        assert wt == 'structure tree broken, assume tree is missing: cycle in structure tree'
+        assert not e