From 74fdf49ade95157c3c4b23a95831925be4899223 Mon Sep 17 00:00:00 2001
From: Peter Cock <p.j.a.cock@googlemail.com>
Date: Mon, 5 Jun 2023 12:39:59 +0100
Subject: [PATCH] Skip if ReportLab bitmap output module missing

Would like to skip this earlier, but not so
easy in ReportLab v4 with a choice of backends
---
 Tests/test_GraphicsBitmaps.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Tests/test_GraphicsBitmaps.py b/Tests/test_GraphicsBitmaps.py
index 2ffdfb3dd71..76615a2fd1d 100644
--- a/Tests/test_GraphicsBitmaps.py
+++ b/Tests/test_GraphicsBitmaps.py
@@ -111,9 +111,12 @@ def real_test():
                 "Check the fonts needed by ReportLab if you want "
                 "bitmaps from Bio.Graphics\n" + str(err)
             ) from None
+        elif str(err).startswith("cannot import desired renderPM backend rlPyCairo"):
+            raise MissingExternalDependencyError(
+                "Reportlab module rlPyCairo unavailable\n" + str(err)
+            ) from None
         else:
             raise
-
     return True