add tests for MoveValueStats

src/logic/mvs.rs

@@ -17,6 +17,36 @@ pub struct MoveValueStats {
 }
 
 impl MoveValueStats {
+    #[cfg(test)]
+    pub const fn new_from_wins_losses(wins: u16, losses: u16) -> Self {
+        Self {
+            state: None,
+            wins,
+            losses,
+            value: 0,
+        }
+    }
+
+    #[cfg(test)]
+    pub const fn new_from_value(value: i32) -> Self {
+        Self {
+            state: None,
+            wins: 0,
+            losses: 0,
+            value,
+        }
+    }
+
+    #[cfg(test)]
+    pub const fn new_from_state(state: Option<MVSGameState>) -> Self {
+        Self {
+            state,
+            wins: 0,
+            losses: 0,
+            value: 0,
+        }
+    }
+
     fn chance_win(&self) -> Option<f32> {
         let sum = self.losses + self.wins;
         if sum == 0 {
@@ -55,16 +85,39 @@ impl Ord for MoveValueStats {
             return self.state.cmp(&other.state);
         }
 
-        if let Some(s_cw) = self.chance_win() {
-            if let Some(o_cw) = other.chance_win() {
+        let (s_cw, o_cw) = (self.chance_win(), other.chance_win());
         if s_cw > o_cw {
             return Ordering::Greater;
         } else if o_cw > s_cw {
             return Ordering::Less;
         }
-            }
-        }
 
         self.value.cmp(&other.value)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn two_prob() {
+        let one = MoveValueStats::new_from_wins_losses(10, 4);
+        let two = MoveValueStats::new_from_wins_losses(4, 6);
+        assert!(one > two);
+    }
+
+    #[test]
+    fn one_prob_one_non() {
+        let one = MoveValueStats::new_from_wins_losses(10, 4);
+        let two = MoveValueStats::new_from_value(10);
+        assert!(one > two);
+    }
+
+    #[test]
+    fn one_prob_one_win() {
+        let one = MoveValueStats::new_from_wins_losses(10, 4);
+        let two = MoveValueStats::new_from_state(Some(MVSGameState::Win));
+        assert!(one < two);
+    }
+}