[Tests] Relaxed the test_render_3d_variant_1 test

- Having problems with new KiCad 6 images

tests/test_plot/test_step.py

@@ -151,7 +151,7 @@ def test_render_3d_variant_1(test_dir):
     # Check all outputs are there
     name = prj+'-3D_top.png'
     ctx.expect_out_file(name)
-    ctx.compare_image(name, fuzz='8%', tol=1000)
+    ctx.compare_image(name, fuzz='48%', tol=1000, trim=True)
     ctx.clean_up(keep_project=True)
 
 

tests/utils/context.py

@@ -486,7 +486,7 @@ class TestContext(object):
         return self.search_not_in_file(os.path.join(self.sub_dir, file), texts)
 
     def compare_image(self, image, reference=None, diff='diff.png', ref_out_dir=False, fuzz='5%', tol=0, height='87%',
-                      off_y='0', sub=False):
+                      off_y='0', sub=False, trim=False):
         """ For images and single page PDFs """
         if reference is None:
             reference = image
@@ -505,6 +505,9 @@ class TestContext(object):
             png_image = image[:-3]+'png'
             subprocess.check_call(['rsvg-convert', '-d', '300', '-p', '300', '-o', png_image, image])
             image = png_image
+        if trim:
+            cmd = ['convert', image, '-trim', image]
+            subprocess.run(cmd)
         cmd = ['compare',
                # Tolerate 5 % error in color
                '-fuzz', fuzz,