3 files changed, 148 insertions, 0 deletions
diff --git a/src/libs/intertrait/cast/arc.rs b/src/libs/intertrait/cast/arc.rs
index 135cf64..6d3867c 100644
--- a/src/libs/intertrait/cast/arc.rs
+++ b/src/libs/intertrait/cast/arc.rs
@@ -45,3 +45,53 @@ impl<CastFromSelf: ?Sized + CastFromSync> CastArc for CastFromSelf
         })
     }
 }
+
+#[cfg(test)]
+mod tests
+{
+    use std::any::Any;
+    use std::fmt::{Debug, Display};
+    use std::sync::Arc;
+
+    use super::*;
+    use crate::test_utils::subjects;
+
+    #[test]
+    fn can_cast_arc()
+    {
+        let concrete_ninja = Arc::new(subjects::Ninja);
+
+        let abstract_ninja: Arc<dyn subjects::INinja> = concrete_ninja;
+
+        let debug_ninja_result = abstract_ninja.cast::<dyn Debug>();
+
+        assert!(debug_ninja_result.is_ok());
+    }
+
+    #[test]
+    fn cannot_cast_arc_wrong()
+    {
+        let concrete_ninja = Arc::new(subjects::Ninja);
+
+        let abstract_ninja: Arc<dyn subjects::INinja> = concrete_ninja;
+
+        let display_ninja_result = abstract_ninja.cast::<dyn Display>();
+
+        assert!(matches!(
+            display_ninja_result,
+            Err(CastError::GetCasterFailed(_))
+        ));
+    }
+
+    #[test]
+    fn can_cast_arc_from_any()
+    {
+        let concrete_ninja = Arc::new(subjects::Ninja);
+
+        let any_ninja: Arc<dyn Any + Send + Sync> = concrete_ninja;
+
+        let debug_ninja_result = any_ninja.cast::<dyn Debug>();
+
+        assert!(debug_ninja_result.is_ok());
+    }
+}
diff --git a/src/libs/intertrait/cast/box.rs b/src/libs/intertrait/cast/box.rs
index 67fd949..0e160f4 100644
--- a/src/libs/intertrait/cast/box.rs
+++ b/src/libs/intertrait/cast/box.rs
@@ -40,3 +40,52 @@ impl<CastFromSelf: ?Sized + CastFrom> CastBox for CastFromSelf
         })
     }
 }
+
+#[cfg(test)]
+mod tests
+{
+    use std::any::Any;
+    use std::fmt::{Debug, Display};
+
+    use super::*;
+    use crate::test_utils::subjects;
+
+    #[test]
+    fn can_cast_box()
+    {
+        let concrete_ninja = Box::new(subjects::Ninja);
+
+        let abstract_ninja: Box<dyn subjects::INinja> = concrete_ninja;
+
+        let debug_ninja_result = abstract_ninja.cast::<dyn Debug>();
+
+        assert!(debug_ninja_result.is_ok());
+    }
+
+    #[test]
+    fn cannot_cast_box_wrong()
+    {
+        let concrete_ninja = Box::new(subjects::Ninja);
+
+        let abstract_ninja: Box<dyn subjects::INinja> = concrete_ninja;
+
+        let display_ninja_result = abstract_ninja.cast::<dyn Display>();
+
+        assert!(matches!(
+            display_ninja_result,
+            Err(CastError::GetCasterFailed(_))
+        ));
+    }
+
+    #[test]
+    fn can_cast_box_from_any()
+    {
+        let concrete_ninja = Box::new(subjects::Ninja);
+
+        let any_ninja: Box<dyn Any> = concrete_ninja;
+
+        let debug_ninja_result = any_ninja.cast::<dyn Debug>();
+
+        assert!(debug_ninja_result.is_ok());
+    }
+}
diff --git a/src/libs/intertrait/cast/rc.rs b/src/libs/intertrait/cast/rc.rs
index ec70544..906490d 100644
--- a/src/libs/intertrait/cast/rc.rs
+++ b/src/libs/intertrait/cast/rc.rs
@@ -40,3 +40,52 @@ impl<CastFromSelf: ?Sized + CastFrom> CastRc for CastFromSelf
         })
     }
 }
+
+#[cfg(test)]
+mod tests
+{
+    use std::any::Any;
+    use std::fmt::{Debug, Display};
+
+    use super::*;
+    use crate::test_utils::subjects;
+
+    #[test]
+    fn can_cast_rc()
+    {
+        let concrete_ninja = Rc::new(subjects::Ninja);
+
+        let abstract_ninja: Rc<dyn subjects::INinja> = concrete_ninja;
+
+        let debug_ninja_result = abstract_ninja.cast::<dyn Debug>();
+
+        assert!(debug_ninja_result.is_ok());
+    }
+
+    #[test]
+    fn cannot_cast_rc_wrong()
+    {
+        let concrete_ninja = Rc::new(subjects::Ninja);
+
+        let abstract_ninja: Rc<dyn subjects::INinja> = concrete_ninja;
+
+        let display_ninja_result = abstract_ninja.cast::<dyn Display>();
+
+        assert!(matches!(
+            display_ninja_result,
+            Err(CastError::GetCasterFailed(_))
+        ));
+    }
+
+    #[test]
+    fn can_cast_rc_from_any()
+    {
+        let concrete_ninja = Rc::new(subjects::Ninja);
+
+        let any_ninja: Rc<dyn Any> = concrete_ninja;
+
+        let debug_ninja_result = any_ninja.cast::<dyn Debug>();
+
+        assert!(debug_ninja_result.is_ok());
+    }
+}