Implement some helpful testing types and traits in the moves package

moves/src/lib.rs

@@ -1,12 +1,14 @@
 // Eryn Wells <eryn@erynwells.me>
 
+pub mod testing;
+
 mod builder;
 mod castle;
 mod defs;
 mod en_passant;
 mod moves;
 
-pub use builder::{Builder, Error as BuilderError};
+pub use builder::{Builder, Error as BuildMoveError, Result as BuildMoveResult};
 pub use castle::Castle;
 pub use defs::PromotionShape;
 pub use en_passant::EnPassant;

moves/src/testing.rs

@@ -0,0 +1,17 @@
+// Eryn Wells <eryn@erynwells.me>
+
+use crate::BuildMoveError;
+
+pub type TestResult = Result<(), TestError>;
+
+#[derive(Debug, Eq, PartialEq)]
+pub enum TestError {
+    BuildMove(BuildMoveError),
+    NoLegalMoves,
+}
+
+impl From<BuildMoveError> for TestError {
+    fn from(value: BuildMoveError) -> Self {
+        TestError::BuildMove(value)
+    }
+}