From b7a8627bcfa64d2611e08f4d7963f35956e07400 Mon Sep 17 00:00:00 2001 From: Phan Huy Tran Date: Wed, 28 May 2025 12:50:54 +0200 Subject: [PATCH] test: dice service --- .../casino/blackjack/BlackJackGameEntity.java | 2 - .../java/de/szut/casino/dice/DiceDto.java | 2 + .../java/de/szut/casino/dice/DiceService.java | 5 +- .../de/szut/casino/dice/DiceServiceTest.java | 216 ++++++++++++++++++ 4 files changed, 221 insertions(+), 4 deletions(-) create mode 100644 backend/src/test/java/de/szut/casino/dice/DiceServiceTest.java diff --git a/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java b/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java index c9f57d7..4f22c9d 100644 --- a/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java +++ b/backend/src/main/java/de/szut/casino/blackjack/BlackJackGameEntity.java @@ -4,8 +4,6 @@ import com.fasterxml.jackson.annotation.JsonIgnore; import com.fasterxml.jackson.annotation.JsonManagedReference; import de.szut.casino.user.UserEntity; import jakarta.persistence.*; -import jakarta.validation.constraints.NotNull; -import jakarta.validation.constraints.Positive; import lombok.AllArgsConstructor; import lombok.Getter; import lombok.NoArgsConstructor; diff --git a/backend/src/main/java/de/szut/casino/dice/DiceDto.java b/backend/src/main/java/de/szut/casino/dice/DiceDto.java index ecbf3d7..f0caf48 100644 --- a/backend/src/main/java/de/szut/casino/dice/DiceDto.java +++ b/backend/src/main/java/de/szut/casino/dice/DiceDto.java @@ -5,12 +5,14 @@ import jakarta.validation.constraints.DecimalMax; import jakarta.validation.constraints.DecimalMin; import jakarta.validation.constraints.NotNull; import lombok.Getter; +import lombok.NoArgsConstructor; import lombok.Setter; import java.math.BigDecimal; @Getter @Setter +@NoArgsConstructor public class DiceDto extends BetDto { private boolean rollOver; diff --git a/backend/src/main/java/de/szut/casino/dice/DiceService.java b/backend/src/main/java/de/szut/casino/dice/DiceService.java index 71e4584..836620b 100644 --- a/backend/src/main/java/de/szut/casino/dice/DiceService.java +++ b/backend/src/main/java/de/szut/casino/dice/DiceService.java @@ -11,10 +11,11 @@ import java.util.Random; @Service public class DiceService { private static final int MAX_DICE_VALUE = 100; - private final Random random = new Random(); + private final Random random; private final BalanceService balanceService; - public DiceService(BalanceService balanceService) { + public DiceService(Random random, BalanceService balanceService) { + this.random = random; this.balanceService = balanceService; } diff --git a/backend/src/test/java/de/szut/casino/dice/DiceServiceTest.java b/backend/src/test/java/de/szut/casino/dice/DiceServiceTest.java new file mode 100644 index 0000000..21ca6cf --- /dev/null +++ b/backend/src/test/java/de/szut/casino/dice/DiceServiceTest.java @@ -0,0 +1,216 @@ +package de.szut.casino.dice; + +import de.szut.casino.shared.service.BalanceService; +import de.szut.casino.user.UserEntity; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.Test; +import org.junit.jupiter.api.extension.ExtendWith; +import org.mockito.InjectMocks; +import org.mockito.Mock; +import org.mockito.junit.jupiter.MockitoExtension; + +import java.math.BigDecimal; +import java.util.Random; + +import static org.junit.jupiter.api.Assertions.*; +import static org.mockito.Mockito.*; + +@ExtendWith(MockitoExtension.class) +class DiceServiceTest { + + @Mock + private BalanceService balanceService; + + @Mock + private Random random; + + @InjectMocks + private DiceService diceService; + + private UserEntity user; + private DiceDto diceDto; + + @BeforeEach + void setUp() { + user = new UserEntity(); + user.setId(1L); + user.setBalance(BigDecimal.valueOf(1000)); + + diceDto = new DiceDto(); + diceDto.setBetAmount(BigDecimal.valueOf(10)); + diceDto.setTargetValue(BigDecimal.valueOf(50)); + diceDto.setRollOver(true); + } + + @Test + void play_rollOver_win() { + diceDto.setRollOver(true); + diceDto.setTargetValue(BigDecimal.valueOf(50)); + when(random.nextInt(anyInt())).thenReturn(55); + + DiceResult result = diceService.play(user, diceDto); + + assertTrue(result.isWin()); + assertEquals(BigDecimal.valueOf(56), result.getRolledValue()); + verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount()); + verify(balanceService, times(1)).addFunds(eq(user), any(BigDecimal.class)); + } + + @Test + void play_rollOver_lose() { + diceDto.setRollOver(true); + diceDto.setTargetValue(BigDecimal.valueOf(50)); + when(random.nextInt(anyInt())).thenReturn(49); + + DiceResult result = diceService.play(user, diceDto); + + assertFalse(result.isWin()); + assertEquals(BigDecimal.valueOf(50), result.getRolledValue()); + assertEquals(BigDecimal.ZERO, result.getPayout()); + verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount()); + verify(balanceService, never()).addFunds(eq(user), any(BigDecimal.class)); + } + + @Test + void play_rollUnder_win() { + diceDto.setRollOver(false); + diceDto.setTargetValue(BigDecimal.valueOf(50)); + when(random.nextInt(anyInt())).thenReturn(48); + + DiceResult result = diceService.play(user, diceDto); + + assertTrue(result.isWin()); + assertEquals(BigDecimal.valueOf(49), result.getRolledValue()); + verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount()); + verify(balanceService, times(1)).addFunds(eq(user), any(BigDecimal.class)); + } + + @Test + void play_rollUnder_lose() { + diceDto.setRollOver(false); + diceDto.setTargetValue(BigDecimal.valueOf(50)); + when(random.nextInt(anyInt())).thenReturn(50); + + DiceResult result = diceService.play(user, diceDto); + + assertFalse(result.isWin()); + assertEquals(BigDecimal.valueOf(51), result.getRolledValue()); + assertEquals(BigDecimal.ZERO, result.getPayout()); + verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount()); + verify(balanceService, never()).addFunds(eq(user), any(BigDecimal.class)); + } + + @Test + void play_rollOver_targetValueOne_lose() { + diceDto.setRollOver(true); + diceDto.setTargetValue(BigDecimal.valueOf(1)); + when(random.nextInt(anyInt())).thenReturn(0); + + DiceResult result = diceService.play(user, diceDto); + + assertFalse(result.isWin()); + assertEquals(BigDecimal.valueOf(1), result.getRolledValue()); + assertEquals(BigDecimal.ZERO, result.getPayout()); + } + + @Test + void play_rollUnder_targetValueOne_win() { + diceDto.setRollOver(false); + diceDto.setTargetValue(BigDecimal.valueOf(1)); + when(random.nextInt(anyInt())).thenReturn(0); + + DiceResult result = diceService.play(user, diceDto); + + assertFalse(result.isWin()); + assertEquals(BigDecimal.valueOf(1), result.getRolledValue()); + assertEquals(BigDecimal.ZERO, result.getPayout()); + } + + @Test + void play_rollOver_targetValueNinetyNine_win() { + diceDto.setRollOver(true); + diceDto.setTargetValue(BigDecimal.valueOf(99)); + when(random.nextInt(anyInt())).thenReturn(99); + + DiceResult result = diceService.play(user, diceDto); + + assertTrue(result.isWin()); + assertEquals(BigDecimal.valueOf(100), result.getRolledValue()); + } + + @Test + void play_rollUnder_targetValueNinetyNine_win() { + diceDto.setRollOver(false); + diceDto.setTargetValue(BigDecimal.valueOf(99)); + when(random.nextInt(anyInt())).thenReturn(97); + + DiceResult result = diceService.play(user, diceDto); + + assertTrue(result.isWin()); + assertEquals(BigDecimal.valueOf(98), result.getRolledValue()); + } + + @Test + void play_rollOver_targetValueOneHundred_lose() { + diceDto.setRollOver(true); + diceDto.setTargetValue(BigDecimal.valueOf(100)); + when(random.nextInt(anyInt())).thenReturn(99); + + DiceResult result = diceService.play(user, diceDto); + + assertFalse(result.isWin()); + assertEquals(BigDecimal.valueOf(100), result.getRolledValue()); + assertEquals(BigDecimal.ZERO, result.getPayout()); + } + + @Test + void play_rollUnder_targetValueOneHundred_win() { + diceDto.setRollOver(false); + diceDto.setTargetValue(BigDecimal.valueOf(100)); + when(random.nextInt(anyInt())).thenReturn(98); + + DiceResult result = diceService.play(user, diceDto); + + assertTrue(result.isWin()); + assertEquals(BigDecimal.valueOf(99), result.getRolledValue()); + } + + @Test + void play_payoutCalculationCorrect() { + diceDto.setRollOver(true); + diceDto.setTargetValue(BigDecimal.valueOf(75)); + when(random.nextInt(anyInt())).thenReturn(75); + + // Multiplier for win chance 25: (100-1)/25 = 99/25 = 3.96 + // Payout: 10 * 3.96 = 39.6 + + DiceResult result = diceService.play(user, diceDto); + + assertTrue(result.isWin()); + assertEquals(BigDecimal.valueOf(39.6).stripTrailingZeros(), result.getPayout().stripTrailingZeros()); + } + + @Test + void play_payoutCalculationCorrect_rollUnder() { + diceDto.setRollOver(false); + diceDto.setTargetValue(BigDecimal.valueOf(25)); + when(random.nextInt(anyInt())).thenReturn(0); + + // Multiplier for win chance 24: (100-1)/24 = 99/24 = 4.125 + // Payout: 10 * 4.125 = 41.25 + + DiceResult result = diceService.play(user, diceDto); + + assertTrue(result.isWin()); + assertEquals(BigDecimal.valueOf(41.25).stripTrailingZeros(), result.getPayout().stripTrailingZeros()); + } + + @Test + void play_betAmountSubtracted() { + when(random.nextInt(anyInt())).thenReturn(50); + + diceService.play(user, diceDto); + + verify(balanceService, times(1)).subtractFunds(user, diceDto.getBetAmount()); + } +}