Add an assert_move_list! macro to help with verifying move lists

position/src/lib.rs

@@ -11,5 +11,9 @@ mod sight;
 #[macro_use]
 mod macros;
 
+#[cfg(test)]
+#[macro_use]
+mod tests;
+
 pub use position::{MoveBuilder as MakeMoveBuilder, Position, PositionBuilder};
 pub use r#move::{Castle, MakeMoveError, Move, MoveBuilder};

position/src/tests.rs

@@ -0,0 +1,19 @@
+// Eryn Wells <eryn@erynwells.me>
+
+#[macro_export]
+macro_rules! assert_move_list {
+    ($generated:expr, $expected:expr, $position:expr) => {
+        assert_eq!(
+            $generated,
+            $expected,
+            "Difference: {:?}",
+            $generated
+                .symmetric_difference(&$expected)
+                .map(|mv| format!(
+                    "{}",
+                    $crate::r#move::AlgebraicMoveFormatter::new(mv, &$position)
+                ))
+                .collect::<Vec<String>>()
+        )
+    };
+}