Bug 1888400 - Add a test. r=gw

Differential Revision: https://phabricator.services.mozilla.com/D206099

Author: nical

wrench/reftests/gradient/radial-border-radius-large-ref.png

@@ -0,0 +1,21 @@
+# This test contains a radial gradient with rounded corners.
+# The primitive is large enough to exercise the quad nine-patch
+# code path.
+# In addition the primitive contains a large solid color portion
+# causing the gradient optimization to split it into two primitives. 
+---
+root:
+  items:
+    - type: clip
+      id: 5
+      complex:
+        - rect: [10, 10, 750, 500]
+          radius: 32
+    - type: radial-gradient
+      bounds: 10 10 750 500
+      center: 0 0
+      radius: 400 350
+      stops: [0.0, red, 1.0, blue]
+      clip-chain: [5]
+
+

wrench/reftests/gradient/radial-border-radius-large.yaml

@@ -82,6 +82,7 @@ fuzzy(1,7) == tiling-conic-3.yaml tiling-conic-3-ref.yaml
 platform(linux,mac) == linear-aligned-border-radius.yaml linear-aligned-border-radius.png
 # interpolation fuzz from sampling texture-baked gradient ramps
 platform(linux,mac) fuzzy-range(<=1,*1404) == repeat-border-radius.yaml repeat-border-radius.png
+fuzzy(1,6000) == radial-border-radius-large.yaml radial-border-radius-large-ref.png
 
 == conic.yaml conic-ref.yaml
 fuzzy(1,57) == conic-simple.yaml conic-simple.png