[librsvg] surface_utils: shorten iterator test code

[Paolo Borelli <pborelli src gnome org>]

commit 823bdd5c79b25bbc66a590b79dc0abaa3f48b827
Author: Paolo Borelli <pborelli gnome org>
Date:   Wed Jan 15 01:44:30 2020 +0100

    surface_utils: shorten iterator test code

 rsvg_internals/src/surface_utils/iterators.rs | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)
---
diff --git a/rsvg_internals/src/surface_utils/iterators.rs b/rsvg_internals/src/surface_utils/iterators.rs
index 920da89b..62c15e5d 100644
--- a/rsvg_internals/src/surface_utils/iterators.rs
+++ b/rsvg_internals/src/surface_utils/iterators.rs
@@ -201,11 +201,7 @@ mod tests {
         const WIDTH: i32 = 32;
         const HEIGHT: i32 = 64;
 
-        let surface = SharedImageSurface::wrap(
-            cairo::ImageSurface::create(cairo::Format::ARgb32, WIDTH, HEIGHT).unwrap(),
-            SurfaceType::SRgb,
-        )
-        .unwrap();
+        let surface = SharedImageSurface::empty(WIDTH, HEIGHT, SurfaceType::SRgb).unwrap();
 
         // Full image.
         assert_eq!(Pixels::new(&surface).count(), (WIDTH * HEIGHT) as usize);
@@ -240,11 +236,7 @@ mod tests {
         const WIDTH: i32 = 32;
         const HEIGHT: i32 = 64;
 
-        let surface = SharedImageSurface::wrap(
-            cairo::ImageSurface::create(cairo::Format::ARgb32, WIDTH, HEIGHT).unwrap(),
-            SurfaceType::SRgb,
-        )
-        .unwrap();
+        let surface = SharedImageSurface::empty(WIDTH, HEIGHT, SurfaceType::SRgb).unwrap();
 
         let rect_bounds = IRect::new(-8, -8, 8, 8);
         assert_eq!(