[librsvg] coord_units.rs: Test the default value and converter

[Federico Mena Quintero <federico src gnome org>]

commit 900f8e2007a2552fc43dc6c7865853d4ead590d0
Author: Federico Mena Quintero <federico gnome org>
Date:   Fri Dec 1 10:23:21 2017 -0600

    coord_units.rs: Test the default value and converter

 rust/src/coord_units.rs |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/rust/src/coord_units.rs b/rust/src/coord_units.rs
index 564e232..845961d 100644
--- a/rust/src/coord_units.rs
+++ b/rust/src/coord_units.rs
@@ -80,4 +80,14 @@ mod tests {
         assert_eq! (MyUnits::parse ("userSpaceOnUse", ()), Ok (MyUnits(CoordUnits::UserSpaceOnUse)));
         assert_eq! (MyUnits::parse ("objectBoundingBox", ()), Ok (MyUnits(CoordUnits::ObjectBoundingBox)));
     }
+
+    #[test]
+    fn has_correct_default() {
+        assert_eq!(MyUnits::default(), MyUnits(CoordUnits::ObjectBoundingBox));
+    }
+
+    #[test]
+    fn converts_to_coord_units() {
+        assert_eq!(CoordUnits::from(MyUnits(CoordUnits::ObjectBoundingBox)), CoordUnits::ObjectBoundingBox);
+    }
 }