test: split up cast unit tests into their respective modules

4 files changed, 156 insertions, 96 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());
+    }
+}
diff --git a/src/libs/intertrait/mod.rs b/src/libs/intertrait/mod.rs
index 78f98b1..4a9322f 100644
--- a/src/libs/intertrait/mod.rs
+++ b/src/libs/intertrait/mod.rs
@@ -244,46 +244,39 @@ impl CastFromSync for dyn Any + Sync + Send + 'static
 #[cfg(test)]
 mod tests
 {
-    use std::any::{Any, TypeId};
-    use std::fmt::{Debug, Display};
+    use std::any::TypeId;
+    use std::fmt::Debug;
 
     use linkme::distributed_slice;
 
-    #[allow(clippy::wildcard_imports)]
-    use super::cast::*;
     use super::*;
+    use crate::test_utils::subjects;
 
     #[distributed_slice(super::CASTERS)]
     static TEST_CASTER: fn() -> (TypeId, BoxedCaster) = create_test_caster;
 
-    #[derive(Debug)]
-    struct TestStruct;
-
-    trait SourceTrait: CastFromSync {}
-
-    impl SourceTrait for TestStruct {}
-
     fn create_test_caster() -> (TypeId, BoxedCaster)
     {
-        let type_id = TypeId::of::<TestStruct>();
+        let type_id = TypeId::of::<subjects::Ninja>();
+
         let caster = Box::new(Caster::<dyn Debug> {
             cast_box: |from| {
                 let concrete = from
-                    .downcast::<TestStruct>()
+                    .downcast::<subjects::Ninja>()
                     .map_err(|_| CasterError::CastBoxFailed)?;
 
                 Ok(concrete as Box<dyn Debug>)
             },
             cast_rc: |from| {
                 let concrete = from
-                    .downcast::<TestStruct>()
+                    .downcast::<subjects::Ninja>()
                     .map_err(|_| CasterError::CastRcFailed)?;
 
                 Ok(concrete as Rc<dyn Debug>)
             },
             opt_cast_arc: Some(|from| {
                 let concrete = from
-                    .downcast::<TestStruct>()
+                    .downcast::<subjects::Ninja>()
                     .map_err(|_| CasterError::CastArcFailed)?;
 
                 Ok(concrete as Arc<dyn Debug>)
@@ -291,85 +284,4 @@ mod tests
         });
         (type_id, caster)
     }
-
-    #[test]
-    fn cast_box()
-    {
-        let ts = Box::new(TestStruct);
-        let st: Box<dyn SourceTrait> = ts;
-        let debug = st.cast::<dyn Debug>();
-        assert!(debug.is_ok());
-    }
-
-    #[test]
-    fn cast_rc()
-    {
-        let ts = Rc::new(TestStruct);
-        let st: Rc<dyn SourceTrait> = ts;
-        let debug = st.cast::<dyn Debug>();
-        assert!(debug.is_ok());
-    }
-
-    #[test]
-    fn cast_arc()
-    {
-        let ts = Arc::new(TestStruct);
-        let st: Arc<dyn SourceTrait> = ts;
-        let debug = st.cast::<dyn Debug>();
-        assert!(debug.is_ok());
-    }
-
-    #[test]
-    fn cast_box_wrong()
-    {
-        let ts = Box::new(TestStruct);
-        let st: Box<dyn SourceTrait> = ts;
-        let display = st.cast::<dyn Display>();
-        assert!(display.is_err());
-    }
-
-    #[test]
-    fn cast_rc_wrong()
-    {
-        let ts = Rc::new(TestStruct);
-        let st: Rc<dyn SourceTrait> = ts;
-        let display = st.cast::<dyn Display>();
-        assert!(display.is_err());
-    }
-
-    #[test]
-    fn cast_arc_wrong()
-    {
-        let ts = Arc::new(TestStruct);
-        let st: Arc<dyn SourceTrait> = ts;
-        let display = st.cast::<dyn Display>();
-        assert!(display.is_err());
-    }
-
-    #[test]
-    fn cast_box_from_any()
-    {
-        let ts = Box::new(TestStruct);
-        let st: Box<dyn Any> = ts;
-        let debug = st.cast::<dyn Debug>();
-        assert!(debug.is_ok());
-    }
-
-    #[test]
-    fn cast_rc_from_any()
-    {
-        let ts = Rc::new(TestStruct);
-        let st: Rc<dyn Any> = ts;
-        let debug = st.cast::<dyn Debug>();
-        assert!(debug.is_ok());
-    }
-
-    #[test]
-    fn cast_arc_from_any()
-    {
-        let ts = Arc::new(TestStruct);
-        let st: Arc<dyn Any + Send + Sync> = ts;
-        let debug = st.cast::<dyn Debug>();
-        assert!(debug.is_ok());
-    }
 }