From eed9265be711432f40247f149c07f9e33511192a Mon Sep 17 00:00:00 2001
From: Kostya <mail@sartin.in>
Date: Sun, 16 Aug 2026 18:50:15 +0000
Subject: Split DTOs into api/model, extract order matching into
 service/matching

Moves Event/Ledger DTOs out of the flat api package into
api/model/{event,ledger}, and moves LocalCatalogContext and order
matching logic into dedicated service/catalog and service/matching
packages, replacing TradingOperation/TradingOperationImpl.
---
 .../mechanism/LmsrTradingMechanismTest.java        | 37 ----------------
 .../mechanism/OrderBookTradingMechanismTest.java   | 51 ----------------------
 2 files changed, 88 deletions(-)
 delete mode 100644 service/src/test/java/market/guess/service/mechanism/LmsrTradingMechanismTest.java
 delete mode 100644 service/src/test/java/market/guess/service/mechanism/OrderBookTradingMechanismTest.java

(limited to 'service/src/test/java')

diff --git a/service/src/test/java/market/guess/service/mechanism/LmsrTradingMechanismTest.java b/service/src/test/java/market/guess/service/mechanism/LmsrTradingMechanismTest.java
deleted file mode 100644
index f5c6af5..0000000
--- a/service/src/test/java/market/guess/service/mechanism/LmsrTradingMechanismTest.java
+++ /dev/null
@@ -1,37 +0,0 @@
-package market.guess.service.mechanism;
-
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertEquals;
-
-import java.math.BigDecimal;
-import org.junit.Test;
-
-public class LmsrTradingMechanismTest {
-
-  @Test
-  public void openingCostMatchesLmsrFormula() {
-    var mechanism = new LmsrTradingMechanism(100, 2);
-
-    assertEquals(new BigDecimal("69.31"), mechanism.openingCost());
-  }
-
-  @Test
-  public void pricesStartEven() {
-    var mechanism = new LmsrTradingMechanism(100, 2);
-
-    assertArrayEquals(
-        new BigDecimal[] {new BigDecimal("0.50"), new BigDecimal("0.50")}, mechanism.prices());
-  }
-
-  @Test
-  public void buyingSharesShiftsCostAndPrice() {
-    var mechanism = new LmsrTradingMechanism(100, 2);
-
-    var execution = mechanism.buy(0, 100);
-
-    assertEquals(100, execution.filledQuantity());
-    assertEquals(new BigDecimal("62.01"), execution.cost());
-    assertArrayEquals(
-        new BigDecimal[] {new BigDecimal("0.73"), new BigDecimal("0.27")}, mechanism.prices());
-  }
-}
diff --git a/service/src/test/java/market/guess/service/mechanism/OrderBookTradingMechanismTest.java b/service/src/test/java/market/guess/service/mechanism/OrderBookTradingMechanismTest.java
deleted file mode 100644
index b4b2da3..0000000
--- a/service/src/test/java/market/guess/service/mechanism/OrderBookTradingMechanismTest.java
+++ /dev/null
@@ -1,51 +0,0 @@
-package market.guess.service.mechanism;
-
-import static org.junit.Assert.assertEquals;
-
-import java.math.BigDecimal;
-import market.guess.service.mechanism.OrderBookTradingMechanism.Side;
-import org.junit.Test;
-
-public class OrderBookTradingMechanismTest {
-
-  @Test
-  public void limitBuyConsumesRestingAsksInFifoOrderAndLeavesRemainder() {
-    var mechanism = new OrderBookTradingMechanism(false, 100, 1, 2);
-    var price = new BigDecimal("0.60");
-
-    mechanism.placeOrder(0, Side.SELL, 20, price);
-    mechanism.placeOrder(0, Side.SELL, 40, price);
-
-    var execution = mechanism.placeOrder(0, Side.BUY, 50, price);
-
-    assertEquals(50, execution.filledQuantity());
-    assertEquals(new BigDecimal("30.00"), execution.cost());
-
-    var followUp = mechanism.buy(0, 100);
-    assertEquals(10, followUp.filledQuantity());
-  }
-
-  @Test
-  public void marketBuySweepsMultiplePriceLevelsAndPartiallyFillsWhenBookRunsOut() {
-    var mechanism = new OrderBookTradingMechanism(false, 100, 1, 2);
-    mechanism.placeOrder(0, Side.SELL, 10, new BigDecimal("0.50"));
-    mechanism.placeOrder(0, Side.SELL, 10, new BigDecimal("0.70"));
-
-    var execution = mechanism.buy(0, 15);
-
-    assertEquals(15, execution.filledQuantity());
-    assertEquals(new BigDecimal("8.50"), execution.cost());
-
-    var exhausted = mechanism.buy(0, 100);
-    assertEquals(5, exhausted.filledQuantity());
-  }
-
-  @Test
-  public void pricesReflectMidpointOfBestBidAndAsk() {
-    var mechanism = new OrderBookTradingMechanism(false, 100, 1, 2);
-    mechanism.placeOrder(0, Side.BUY, 10, new BigDecimal("0.40"));
-    mechanism.placeOrder(0, Side.SELL, 10, new BigDecimal("0.60"));
-
-    assertEquals(new BigDecimal("0.50"), mechanism.prices()[0]);
-  }
-}
-- 
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