Update test_writer.py

tests/test_writer.py

@@ -30,6 +30,7 @@
 )
 
 from . import get_data_from_url, is_sublist
+from .test_images import image_similarity
 
 TESTS_ROOT = Path(__file__).parent.resolve()
 PROJECT_ROOT = TESTS_ROOT.parent
@@ -1563,15 +1564,20 @@ def test_watermark_rendering(tmp_path):
     writer = PdfWriter(clone_from=BytesIO(get_data_from_url(url, name=name)))
     writer.pages[0].merge_page(reader.pages[0], over=False)
 
+    target_png_path = tmp_path / "target.png"
+    target_png_path.write_bytes(get_data_from_url(
+        "https://github.com/stefan6419846/pypdf/assets/96178532/d0060a47-b454-4f84-bc76-68c87b6c2a76", name="dstwatermark.png"
+    ))
+
     pdf_path = tmp_path / "out.pdf"
     png_path = tmp_path / "out.png"
     writer.write(pdf_path)
     # TODO: Use `shutil.which` beforehand.
     # https://github.com/PyCQA/bandit/issues/333
     subprocess.run(["gs", "-sDEVICE=pngalpha", "-o", png_path, pdf_path])  # noqa: S603,S607
     assert png_path.is_file()
-    import shutil
-    shutil.copyfile(png_path, Path("/home/runner/work/pypdf/pypdf") / "file.png")
+    image_similarity(png_path, target_png_path)
+
 
 
 @pytest.mark.enable_socket()