[librsvg] Move test in the correct place.

[Paolo Borelli <pborelli src gnome org>]

commit 528a84f99f1f555bb74f8335fba1f41a8dffe404
Author: Paolo Borelli <pborelli gnome org>
Date:   Fri Dec 27 19:38:23 2019 +0100

    Move test in the correct place.
    
    This code was moved to the surface utils, move the test as well.

 rsvg_internals/src/filters/context.rs              | 46 ----------------------
 rsvg_internals/src/surface_utils/shared_surface.rs | 46 ++++++++++++++++++++++
 2 files changed, 46 insertions(+), 46 deletions(-)
---
diff --git a/rsvg_internals/src/filters/context.rs b/rsvg_internals/src/filters/context.rs
index 50c14ea2..f3a0324a 100644
--- a/rsvg_internals/src/filters/context.rs
+++ b/rsvg_internals/src/filters/context.rs
@@ -456,49 +456,3 @@ impl FilterInput {
         }
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::surface_utils::iterators::Pixels;
-
-    #[test]
-    fn test_extract_alpha() {
-        const WIDTH: i32 = 32;
-        const HEIGHT: i32 = 64;
-
-        let bounds = IRect::new(8, 24, 16, 48);
-        let full_bounds = IRect::from_size(WIDTH, HEIGHT);
-
-        let mut surface =
-            cairo::ImageSurface::create(cairo::Format::ARgb32, WIDTH, HEIGHT).unwrap();
-
-        // Fill the surface with some data.
-        {
-            let mut data = surface.get_data().unwrap();
-
-            let mut counter = 0u16;
-            for x in data.iter_mut() {
-                *x = counter as u8;
-                counter = (counter + 1) % 256;
-            }
-        }
-
-        let surface = SharedImageSurface::new(surface, SurfaceType::SRgb).unwrap();
-        let alpha = surface.extract_alpha(bounds).unwrap();
-
-        for (x, y, p, pa) in
-            Pixels::new(&surface, full_bounds).map(|(x, y, p)| (x, y, p, alpha.get_pixel(x, y)))
-        {
-            assert_eq!(pa.r, 0);
-            assert_eq!(pa.g, 0);
-            assert_eq!(pa.b, 0);
-
-            if !bounds.contains(x as i32, y as i32) {
-                assert_eq!(pa.a, 0);
-            } else {
-                assert_eq!(pa.a, p.a);
-            }
-        }
-    }
-}
diff --git a/rsvg_internals/src/surface_utils/shared_surface.rs 
b/rsvg_internals/src/surface_utils/shared_surface.rs
index 6ba6f421..53a5b040 100644
--- a/rsvg_internals/src/surface_utils/shared_surface.rs
+++ b/rsvg_internals/src/surface_utils/shared_surface.rs
@@ -895,3 +895,49 @@ impl SharedImageSurface {
         self.surface.to_glib_none()
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::surface_utils::iterators::Pixels;
+
+    #[test]
+    fn test_extract_alpha() {
+        const WIDTH: i32 = 32;
+        const HEIGHT: i32 = 64;
+
+        let bounds = IRect::new(8, 24, 16, 48);
+        let full_bounds = IRect::from_size(WIDTH, HEIGHT);
+
+        let mut surface =
+            cairo::ImageSurface::create(cairo::Format::ARgb32, WIDTH, HEIGHT).unwrap();
+
+        // Fill the surface with some data.
+        {
+            let mut data = surface.get_data().unwrap();
+
+            let mut counter = 0u16;
+            for x in data.iter_mut() {
+                *x = counter as u8;
+                counter = (counter + 1) % 256;
+            }
+        }
+
+        let surface = SharedImageSurface::new(surface, SurfaceType::SRgb).unwrap();
+        let alpha = surface.extract_alpha(bounds).unwrap();
+
+        for (x, y, p, pa) in
+            Pixels::new(&surface, full_bounds).map(|(x, y, p)| (x, y, p, alpha.get_pixel(x, y)))
+        {
+            assert_eq!(pa.r, 0);
+            assert_eq!(pa.g, 0);
+            assert_eq!(pa.b, 0);
+
+            if !bounds.contains(x as i32, y as i32) {
+                assert_eq!(pa.a, 0);
+            } else {
+                assert_eq!(pa.a, p.a);
+            }
+        }
+    }
+}