dev/codeforces/ Добавил тесты для RatingCalculator

Author: AlexanderGarifullin

src/main/java/com/cf/cfteam/utils/codeforces/RatingCalculator.java

@@ -6,7 +6,7 @@
 
 public final class RatingCalculator {
 
-    public static double getWinProbability(double ra, double rb) {
+    private static double getWinProbability(double ra, double rb) {
         return 1.0 / (1.0 + Math.pow(10.0, (rb - ra) / 400.0));
     }
 

src/test/java/com/cf/cfteam/utils/codeforces/RatingCalculatorTest.java

@@ -0,0 +1,26 @@
+package com.cf.cfteam.utils.codeforces;
+
+import com.cf.cfteam.transfer.responses.codeforces.PlayerResponse;
+import org.junit.jupiter.api.Test;
+import org.springframework.test.context.ActiveProfiles;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ActiveProfiles("test")
+class RatingCalculatorTest {
+
+    @Test
+    void testCalculateSoloRating() {
+        PlayerResponse response = PlayerResponse.builder()
+                .id(1L)
+                .login("login")
+                .rating(1000.)
+                .build();
+        List<PlayerResponse> players = List.of(response);
+        var result = RatingCalculator.aggregateRatings(players);
+
+        assertThat(result).isEqualTo(1000.);
+    }
+}