Added RoundRobinTests

app/src/test/java/ru/dragonestia/picker/picker/RoundRobinTests.java

@@ -0,0 +1,59 @@
+package ru.dragonestia.picker.picker;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.annotation.Import;
+import ru.dragonestia.picker.config.FillingNodesConfig;
+import ru.dragonestia.picker.model.Node;
+import ru.dragonestia.picker.repository.RoomRepository;
+import ru.dragonestia.picker.repository.UserRepository;
+import ru.dragonestia.picker.util.UserFiller;
+
+@SpringBootTest
+@Import({FillingNodesConfig.class, UserFiller.class})
+public class RoundRobinTests {
+
+    @Autowired
+    private RoomRepository roomRepository;
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Autowired
+    private UserFiller userFiller;
+
+    @Qualifier("roundNode")
+    @Autowired
+    private Node node;
+
+    @Test
+    void testPickingRoundRobin() {
+        { // first iteration. Take 2 users. need take 'room-2-0'
+            var roomOpt = roomRepository.pickFree(node, userFiller.createRandomUsers(2));
+            Assertions.assertTrue(roomOpt.isPresent());
+
+            var room = roomOpt.get();
+            var slots = room.getSlots();
+            var users = userRepository.usersOf(room);
+            Assertions.assertTrue(slots.isUnlimited() || slots.getSlots() >= users.size()); // check slots limitation
+            System.out.printf("%s/%s%n", users.size(), slots.getSlots());
+
+            Assertions.assertEquals("room-2-0", room.getId());
+        }
+
+        { // second iteration. Take 2 users. need take 'room-2-1'
+            var roomOpt = roomRepository.pickFree(node, userFiller.createRandomUsers(2));
+            Assertions.assertTrue(roomOpt.isPresent());
+
+            var room = roomOpt.get();
+            var slots = room.getSlots();
+            var users = userRepository.usersOf(room);
+            Assertions.assertTrue(slots.isUnlimited() || slots.getSlots() >= users.size()); // check slots limitation
+
+            Assertions.assertEquals("room-2-1", room.getId());
+        }
+    }
+}

app/src/test/java/ru/dragonestia/picker/util/UserFiller.java

@@ -0,0 +1,20 @@
+package ru.dragonestia.picker.util;
+
+import org.springframework.boot.test.context.TestComponent;
+import ru.dragonestia.picker.model.User;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.UUID;
+
+@TestComponent
+public class UserFiller {
+
+    public List<User> createRandomUsers(int amount) {
+        var list = new LinkedList<User>();
+        for (int i = 0; i < amount; i++) {
+            list.add(new User(UUID.randomUUID().toString()));
+        }
+        return list;
+    }
+}