Test empty documentclass

voidstarstar · voidstarstar · commit da9ea78ba9f2 · 2024-05-12T09:30:02.000-04:00
diff --git a/lib/matplotlib/tests/test_backend_pgf.py b/lib/matplotlib/tests/test_backend_pgf.py
@@ -456,3 +456,11 @@ def test_preamble_packages(format, tmp_path):
     path = os.path.join(tmp_path, f'preamble_packages_{format}.pdf')
     with PdfPages(path) as pdf:
         pdf.savefig(plt.figure())
+
+
+# test empty documentclass
+@needs_pgf_xelatex
+@pytest.mark.backend('pgf')
+def test_documentclass():
+    mpl.rcParams['pgf.documentclass'] = ''
+    plt.figure().savefig(BytesIO())
