diff --git a/src/test/java/creator/loki/feature/economy/service/BlackjackServiceTest.java b/src/test/java/creator/loki/feature/economy/service/BlackjackServiceTest.java
new file mode 100644
index 0000000..0d8631c
--- /dev/null
+++ b/src/test/java/creator/loki/feature/economy/service/BlackjackServiceTest.java
@@ -0,0 +1,128 @@
+package creator.loki.feature.economy.service;
+
+import creator.loki.feature.economy.domain.EconomyAccount;
+import creator.loki.feature.economy.repository.EconomyRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class BlackjackServiceTest {
+
+    @Mock
+    private EconomyRepository repository;
+
+    @Captor
+    private ArgumentCaptor<EconomyAccount> accountCaptor;
+
+    private BlackjackService service;
+
+    private final EconomyAccount account = new EconomyAccount.Builder()
+        .userId("user1").cash(1000).build();
+
+    @BeforeEach
+    void setUp() {
+        service = new BlackjackService(repository);
+    }
+
+    @Nested
+    class StartGame {
+
+        @Test
+        void returnsNullWhenBetIsZeroOrNegative() {
+            assertNull(service.startGame("user1", 0));
+            assertNull(service.startGame("user1", -50));
+        }
+
+        @Test
+        void returnsNullWhenInsufficientCash() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            assertNull(service.startGame("user1", 9999));
+        }
+
+        @Test
+        void deductsBetFromCash() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            service.startGame("user1", 200);
+
+            verify(repository).save(accountCaptor.capture());
+            assertEquals(800, accountCaptor.getValue().getCash());
+        }
+    }
+
+    @Nested
+    class Hit {
+
+        @Test
+        void returnsNullWhenNoActiveGame() {
+            assertNull(service.hit("user1"));
+        }
+    }
+
+    @Nested
+    class Stand {
+
+        @Test
+        void returnsNullWhenNoActiveGame() {
+            assertNull(service.stand("user1"));
+        }
+    }
+
+    @Nested
+    class GameFlow {
+
+        @Test
+        void startGameThenStandCompletesGame() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            BlackjackService.BlackjackState state = service.startGame("user1", 100);
+            assertNotNull(state);
+
+            state = service.stand("user1");
+            assertNotNull(state);
+            assertTrue(state.isOver());
+            assertTrue(state.payout() >= 0);
+        }
+
+        @Test
+        void playerHitsUntilBust() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            BlackjackService.BlackjackState state = service.startGame("user1", 100);
+            assertNotNull(state);
+
+            int maxHits = 20;
+            while (!state.isOver() && maxHits-- > 0) {
+                state = service.hit("user1");
+                if (state == null) break;
+            }
+
+            assertNotNull(state);
+            assertTrue(state.isOver());
+            if (state.playerSum() > 21) {
+                assertEquals(0, state.payout());
+            }
+        }
+
+        @Test
+        void startGameThenStandSavesPayout() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            service.startGame("user1", 100);
+            service.stand("user1");
+
+            verify(repository, atLeast(2)).save(any());
+        }
+    }
+}
diff --git a/src/test/java/creator/loki/feature/economy/service/EconomyServiceTest.java b/src/test/java/creator/loki/feature/economy/service/EconomyServiceTest.java
new file mode 100644
index 0000000..498b131
--- /dev/null
+++ b/src/test/java/creator/loki/feature/economy/service/EconomyServiceTest.java
@@ -0,0 +1,252 @@
+package creator.loki.feature.economy.service;
+
+import creator.loki.core.security.CooldownManager;
+import creator.loki.feature.economy.domain.EconomyAccount;
+import creator.loki.feature.economy.repository.EconomyRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.time.LocalDate;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class EconomyServiceTest {
+
+    @Mock
+    private EconomyRepository repository;
+
+    @Mock
+    private CooldownManager cooldownManager;
+
+    @Captor
+    private ArgumentCaptor<EconomyAccount> accountCaptor;
+
+    private EconomyService service;
+
+    private final EconomyAccount baseAccount = new EconomyAccount.Builder()
+        .userId("user1").cash(1000).bank(500).totalEarned(200).totalSpent(100)
+        .lastDaily(LocalDate.now().minusDays(2).toString())
+        .dailyStreak(0).efficiency(0).fishingLuck(0)
+        .build();
+
+    private final EconomyAccount targetAccount = new EconomyAccount.Builder()
+        .userId("user2").cash(500).bank(0).build();
+
+    @BeforeEach
+    void setUp() {
+        service = new EconomyService(repository, cooldownManager);
+    }
+
+    @Nested
+    class Transfer {
+
+        @Test
+        void returnsFalseWhenAmountIsZeroOrNegative() {
+            assertFalse(service.transfer("user1", "user2", 0));
+            assertFalse(service.transfer("user1", "user2", -1));
+        }
+
+        @Test
+        void returnsFalseWhenSenderHasInsufficientCash() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+
+            assertFalse(service.transfer("user1", "user2", 9999));
+            verify(repository, never()).save(any());
+        }
+
+        @Test
+        void returnsTrueAndTransfersCashCorrectly() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+            when(repository.getAccount("user2")).thenReturn(targetAccount);
+
+            assertTrue(service.transfer("user1", "user2", 200));
+
+            verify(repository, times(2)).save(accountCaptor.capture());
+            assertEquals(800, accountCaptor.getAllValues().get(0).getCash());
+            assertEquals(700, accountCaptor.getAllValues().get(1).getCash());
+        }
+
+        @Test
+        void callsRepositorySaveTwice() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+            when(repository.getAccount("user2")).thenReturn(targetAccount);
+
+            service.transfer("user1", "user2", 100);
+
+            verify(repository, times(2)).save(any());
+        }
+    }
+
+    @Nested
+    class Deposit {
+
+        @Test
+        void returnsFalseWhenAmountIsZeroOrNegative() {
+            assertFalse(service.deposit("user1", 0));
+            assertFalse(service.deposit("user1", -5));
+        }
+
+        @Test
+        void returnsFalseWhenInsufficientCash() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+
+            assertFalse(service.deposit("user1", 9999));
+        }
+
+        @Test
+        void returnsTrueAndMovesCashToBank() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+
+            assertTrue(service.deposit("user1", 300));
+
+            verify(repository).save(accountCaptor.capture());
+            EconomyAccount saved = accountCaptor.getValue();
+            assertEquals(700, saved.getCash());
+            assertEquals(800, saved.getBank());
+        }
+    }
+
+    @Nested
+    class Withdraw {
+
+        @Test
+        void returnsFalseWhenAmountIsZeroOrNegative() {
+            assertFalse(service.withdraw("user1", 0));
+            assertFalse(service.withdraw("user1", -10));
+        }
+
+        @Test
+        void returnsFalseWhenInsufficientBank() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+
+            assertFalse(service.withdraw("user1", 9999));
+        }
+
+        @Test
+        void returnsTrueAndMovesBankToCash() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+
+            assertTrue(service.withdraw("user1", 200));
+
+            verify(repository).save(accountCaptor.capture());
+            EconomyAccount saved = accountCaptor.getValue();
+            assertEquals(1200, saved.getCash());
+            assertEquals(300, saved.getBank());
+        }
+    }
+
+    @Nested
+    class EarnCash {
+
+        @Test
+        void addsToCashAndTotalEarned() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+
+            long newCash = service.earnCash("user1", 150);
+
+            assertEquals(1150, newCash);
+            verify(repository).save(accountCaptor.capture());
+            EconomyAccount saved = accountCaptor.getValue();
+            assertEquals(1150, saved.getCash());
+            assertEquals(350, saved.getTotalEarned());
+        }
+    }
+
+    @Nested
+    class SpendCash {
+
+        @Test
+        void returnsFalseWhenAmountIsZeroOrNegative() {
+            assertFalse(service.spendCash("user1", 0));
+            assertFalse(service.spendCash("user1", -50));
+        }
+
+        @Test
+        void returnsFalseWhenInsufficientCash() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+
+            assertFalse(service.spendCash("user1", 9999));
+        }
+
+        @Test
+        void returnsTrueAndSubtractsCashAndAddsToTotalSpent() {
+            when(repository.getAccount("user1")).thenReturn(baseAccount);
+
+            assertTrue(service.spendCash("user1", 400));
+
+            verify(repository).save(accountCaptor.capture());
+            EconomyAccount saved = accountCaptor.getValue();
+            assertEquals(600, saved.getCash());
+            assertEquals(500, saved.getTotalSpent());
+        }
+    }
+
+    @Nested
+    class ClaimDaily {
+
+        @Test
+        void returnsNullWhenAlreadyClaimedToday() {
+            EconomyAccount todayClaimed = new EconomyAccount.Builder(baseAccount)
+                .lastDaily(LocalDate.now().toString())
+                .build();
+            when(repository.getAccount("user1")).thenReturn(todayClaimed);
+
+            assertNull(service.claimDaily("user1"));
+        }
+
+        @Test
+        void returnsDailyResultWithStreakOneForNewUser() {
+            EconomyAccount newUser = new EconomyAccount.Builder()
+                .userId("user1").cash(100).lastDaily(null).dailyStreak(0).build();
+            when(repository.getAccount("user1")).thenReturn(newUser);
+
+            EconomyService.DailyResult result = service.claimDaily("user1");
+
+            assertNotNull(result);
+            assertEquals(1, result.streak());
+            assertEquals(50, result.amount());
+            assertEquals(150, result.newCash());
+        }
+
+        @Test
+        void returnsDailyResultWithStreakTwoForConsecutiveDays() {
+            EconomyAccount returning = new EconomyAccount.Builder(baseAccount)
+                .cash(200).totalEarned(50)
+                .lastDaily(LocalDate.now().minusDays(1).toString())
+                .dailyStreak(1).build();
+            when(repository.getAccount("user1")).thenReturn(returning);
+
+            EconomyService.DailyResult result = service.claimDaily("user1");
+
+            assertNotNull(result);
+            assertEquals(2, result.streak());
+            assertEquals(50, result.amount());
+            assertEquals(250, result.newCash());
+        }
+
+        @Test
+        void returnsDailyResultWithAmountSeventyFiveForStreakAtLeastSeven() {
+            EconomyAccount veteran = new EconomyAccount.Builder(baseAccount)
+                .cash(500).totalEarned(300)
+                .lastDaily(LocalDate.now().minusDays(1).toString())
+                .dailyStreak(6).build();
+            when(repository.getAccount("user1")).thenReturn(veteran);
+
+            EconomyService.DailyResult result = service.claimDaily("user1");
+
+            assertNotNull(result);
+            assertEquals(7, result.streak());
+            assertEquals(75, result.amount());
+            assertEquals(575, result.newCash());
+        }
+    }
+}
diff --git a/src/test/java/creator/loki/feature/economy/service/JobServiceTest.java b/src/test/java/creator/loki/feature/economy/service/JobServiceTest.java
new file mode 100644
index 0000000..923951c
--- /dev/null
+++ b/src/test/java/creator/loki/feature/economy/service/JobServiceTest.java
@@ -0,0 +1,184 @@
+package creator.loki.feature.economy.service;
+
+import creator.loki.feature.economy.domain.EconomyAccount;
+import creator.loki.feature.economy.domain.Job;
+import creator.loki.feature.economy.repository.EconomyRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class JobServiceTest {
+
+    @Mock
+    private EconomyRepository repository;
+
+    @Captor
+    private ArgumentCaptor<EconomyAccount> accountCaptor;
+
+    private JobService service;
+
+    private final EconomyAccount account = new EconomyAccount.Builder()
+        .userId("user1").cash(100).totalEarned(0).efficiency(0)
+        .build();
+
+    @BeforeEach
+    void setUp() {
+        service = new JobService(repository);
+    }
+
+    @Nested
+    class ListJobs {
+
+        @Test
+        void returnsSixJobs() {
+            List<JobService.JobInfo> jobs = service.listJobs();
+
+            assertEquals(6, jobs.size());
+        }
+
+        @Test
+        void containsWoodcutter() {
+            List<JobService.JobInfo> jobs = service.listJobs();
+
+            JobService.JobInfo woodcutter = jobs.stream()
+                .filter(j -> j.name().equals("WOODCUTTER"))
+                .findFirst().orElseThrow();
+            assertEquals("Лесоруб", woodcutter.displayName());
+            assertEquals(0, woodcutter.requiredLevel());
+            assertEquals(15, woodcutter.minPayout());
+            assertEquals(30, woodcutter.maxPayout());
+        }
+    }
+
+    @Nested
+    class SetJob {
+
+        @Test
+        void savesJobNameToAccount() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            service.setJob("user1", "WOODCUTTER");
+
+            verify(repository).save(accountCaptor.capture());
+            assertEquals("WOODCUTTER", accountCaptor.getValue().getJob());
+        }
+
+        @Test
+        void doesNothingForInvalidJobName() {
+            service.setJob("user1", "INVALID");
+
+            verify(repository, never()).save(any());
+        }
+    }
+
+    @Nested
+    class GetCurrentJob {
+
+        @Test
+        void returnsDisplayNameWhenJobIsSet() {
+            EconomyAccount withJob = new EconomyAccount.Builder(account)
+                .job("MINER").build();
+            when(repository.getAccount("user1")).thenReturn(withJob);
+
+            String display = service.getCurrentJob("user1");
+
+            assertEquals("Шахтёр", display);
+        }
+
+        @Test
+        void returnsNullWhenNoJob() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            assertNull(service.getCurrentJob("user1"));
+        }
+    }
+
+    @Nested
+    class Work {
+
+        @Test
+        void returnsNullWhenNoJobSet() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            assertNull(service.work("user1", 0));
+        }
+
+        @Test
+        void returnsNullWhenOnCooldown() {
+            EconomyAccount withJob = new EconomyAccount.Builder(account)
+                .job("WOODCUTTER").lastWork(String.valueOf(System.currentTimeMillis()))
+                .build();
+            when(repository.getAccount("user1")).thenReturn(withJob);
+
+            assertNull(service.work("user1", 0));
+        }
+
+        @Test
+        void returnsWorkResultWithPayoutInRange() {
+            EconomyAccount withJob = new EconomyAccount.Builder(account)
+                .job("WOODCUTTER").lastWork("0")
+                .build();
+            when(repository.getAccount("user1")).thenReturn(withJob);
+
+            JobService.WorkResult result = service.work("user1", 0);
+
+            assertNotNull(result);
+            assertTrue(result.amount() >= 15);
+            assertTrue(result.amount() <= 30);
+            assertTrue(result.newCash() >= 115);
+            assertTrue(result.newCash() <= 130);
+        }
+
+        @Test
+        void multipliesPayoutByEfficiency() {
+            EconomyAccount efficient = new EconomyAccount.Builder(account)
+                .job("WOODCUTTER").lastWork("0").efficiency(100)
+                .build();
+            when(repository.getAccount("user1")).thenReturn(efficient);
+
+            JobService.WorkResult result = service.work("user1", 0);
+
+            assertNotNull(result);
+            assertTrue(result.amount() >= 30);
+            assertTrue(result.amount() <= 60);
+        }
+
+        @Test
+        void returnsNullWhenLevelTooLow() {
+            EconomyAccount withJob = new EconomyAccount.Builder(account)
+                .job("PROGRAMMER").lastWork("0")
+                .build();
+            when(repository.getAccount("user1")).thenReturn(withJob);
+
+            assertNull(service.work("user1", 10));
+        }
+
+        @Test
+        void savesUpdatedAccount() {
+            EconomyAccount withJob = new EconomyAccount.Builder(account)
+                .job("WOODCUTTER").lastWork("0")
+                .build();
+            when(repository.getAccount("user1")).thenReturn(withJob);
+
+            service.work("user1", 0);
+
+            verify(repository).save(accountCaptor.capture());
+            EconomyAccount saved = accountCaptor.getValue();
+            assertNotNull(saved.getLastWork());
+            assertTrue(saved.getCash() >= 115);
+            assertTrue(saved.getTotalEarned() >= 15);
+        }
+    }
+}
diff --git a/src/test/java/creator/loki/feature/economy/service/SlotServiceTest.java b/src/test/java/creator/loki/feature/economy/service/SlotServiceTest.java
new file mode 100644
index 0000000..805c1d8
--- /dev/null
+++ b/src/test/java/creator/loki/feature/economy/service/SlotServiceTest.java
@@ -0,0 +1,132 @@
+package creator.loki.feature.economy.service;
+
+import creator.loki.feature.economy.domain.EconomyAccount;
+import creator.loki.feature.economy.domain.SlotCombination;
+import creator.loki.feature.economy.repository.EconomyRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class SlotServiceTest {
+
+    @Mock
+    private EconomyRepository repository;
+
+    @Captor
+    private ArgumentCaptor<EconomyAccount> accountCaptor;
+
+    private SlotService service;
+
+    private final EconomyAccount account = new EconomyAccount.Builder()
+        .userId("user1").cash(500).build();
+
+    @BeforeEach
+    void setUp() {
+        service = new SlotService(repository);
+    }
+
+    @Nested
+    class Spin {
+
+        @Test
+        void returnsNullWhenBetIsZeroOrNegative() {
+            assertNull(service.spin("user1", 0));
+            assertNull(service.spin("user1", -10));
+        }
+
+        @Test
+        void returnsNullWhenInsufficientCash() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            assertNull(service.spin("user1", 9999));
+        }
+
+        @Test
+        void deductsBetFromCash() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            service.spin("user1", 100);
+
+            verify(repository, atLeastOnce()).save(accountCaptor.capture());
+            assertEquals(400, accountCaptor.getAllValues().get(0).getCash());
+        }
+
+        @Test
+        void returnsNonNullResultWithValidEmojis() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            SlotService.SlotResult result = service.spin("user1", 100);
+
+            assertNotNull(result);
+            assertNotNull(result.emoji1());
+            assertNotNull(result.emoji2());
+            assertNotNull(result.emoji3());
+            assertTrue(result.cashAfter() >= 0);
+        }
+
+        @Test
+        void winAmountIsZeroAndComboNameIsNullWhenNoMatch() {
+            when(repository.getAccount("user1")).thenReturn(account);
+
+            SlotService.SlotResult result = service.spin("user1", 100);
+
+            assertNotNull(result);
+            assertEquals(result.cashAfter(), account.getCash() - 100 + result.winAmount());
+        }
+    }
+
+    @Nested
+    class SlotCombinationMatch {
+
+        @Test
+        void returnsNullForNonMatchingEmojis() {
+            assertNull(SlotCombination.match("\uD83C\uDF52", "\uD83D\uDD14", "\uD83D\uDC8E"));
+            assertNull(SlotCombination.match("\uD83C\uDF52", "\uD83C\uDF52", "\uD83D\uDD14"));
+        }
+
+        @Test
+        void returnsCherryForThreeCherries() {
+            SlotCombination result = SlotCombination.match("\uD83C\uDF52", "\uD83C\uDF52", "\uD83C\uDF52");
+            assertEquals(SlotCombination.CHERRY, result);
+            assertEquals(3, result.getMultiplier());
+        }
+
+        @Test
+        void returnsBellForThreeBells() {
+            SlotCombination result = SlotCombination.match("\uD83D\uDD14", "\uD83D\uDD14", "\uD83D\uDD14");
+            assertEquals(SlotCombination.BELL, result);
+            assertEquals(5, result.getMultiplier());
+        }
+
+        @Test
+        void returnsDiamondForThreeDiamonds() {
+            SlotCombination result = SlotCombination.match("\uD83D\uDC8E", "\uD83D\uDC8E", "\uD83D\uDC8E");
+            assertEquals(SlotCombination.DIAMOND, result);
+            assertEquals(10, result.getMultiplier());
+        }
+
+        @Test
+        void returnsCrownForThreeCrowns() {
+            SlotCombination result = SlotCombination.match("\uD83D\uDC51", "\uD83D\uDC51", "\uD83D\uDC51");
+            assertEquals(SlotCombination.CROWN, result);
+            assertEquals(15, result.getMultiplier());
+        }
+
+        @Test
+        void returnsJackpotForThreeLightningBolts() {
+            SlotCombination result = SlotCombination.match("\u26A1", "\u26A1", "\u26A1");
+            assertEquals(SlotCombination.JACKPOT, result);
+            assertEquals(50, result.getMultiplier());
+        }
+    }
+}