Added another test.

src/lib.rs

@@ -395,6 +395,30 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_rate_8_free_for_all() {
+        // Example from http://research.microsoft.com/en-us/projects/trueskill/details.aspx
+
+        let (ratings, ranks) = generate_free_for_all(8);
+
+        let expected_ratings = vec![
+            Rating::new(36.77209218345724, 5.74919889706158),
+            Rating::new(32.24259218000257, 5.13287020009844),
+            Rating::new(29.07403314155725, 4.94269079502333),
+            Rating::new(26.32218621002892, 4.87453695296329),
+            Rating::new(23.67782451664047, 4.87454338643793),
+            Rating::new(20.92602299394360, 4.94271209665760),
+            Rating::new(17.75766311093125, 5.13291097072849),
+            Rating::new(13.22891063797913, 5.74928289201801),
+        ];
+
+        let ratings = rate(ratings.as_ref(), ranks.as_ref(), DELTA);
+
+        for (rating, expected) in ratings.iter().zip(expected_ratings.iter()) {
+            assert_relative_eq!(rating, expected, epsilon = EPSILON);
+        }
+    }
+
     #[test]
     fn test_rate_8_free_for_all_draw() {
         let (ratings, ranks) = generate_free_for_all_draw(8);