Adapt test suite to Matplotlib 3.10.

Author: anntzer

README.rst

@@ -541,7 +541,7 @@ Due to missing support from cairo:
   - ``ps.useafm`` (effectively always ``False``),
   - ``svg.fonttype`` (effectively always ``"path"``, see `cairo issue #253
     <cairo-253_>`_),
-  - ``svg.hashsalt``.
+  - ``svg.hashsalt``, ``svg.id``.
 
 Additionally, the ``quality``, ``optimize``, and ``progressive`` parameters to
 ``savefig``, which have been removed in Matplotlib 3.5, are not supported.

run-mpl-test-suite.py

@@ -184,7 +184,7 @@ def pytest_collection_modifyitems(session, config, items):
                 # Useful, but the tag structure is too different (e.g. cairo
                 # skips emitting clips that don't intersect paths).
                 "test_backend_svg.py::test_count_bitmaps",
-                # cairo doesn't support custom gids or metadata.
+                # cairo doesn't support custom id, gids, or metadata.
                 "test_backend_svg.py::test_annotationbbox_gid",
                 "test_backend_svg.py::test_gid",
                 "test_backend_svg.py::test_svg_clear_all_metadata",
@@ -193,6 +193,7 @@ def pytest_collection_modifyitems(session, config, items):
                 "test_backend_svg.py::test_svg_escape",
                 "test_backend_svg.py::test_svg_incorrect_metadata[",
                 "test_backend_svg.py::test_svg_metadata",
+                "test_backend_svg.py::test_svgid",
                 # cairo always emits text as glyph paths.
                 "test_backend_svg.py::test_svgnone_with_data_coordinates",
                 # cairo can't emit urls in SVG.