quick end-to-end test

And some bug fixes too!

src/main/kotlin/com/frankenergie/smartasset/service/OrderBookService.kt

@@ -2,16 +2,21 @@ package com.frankenergie.smartasset.service
 
 import com.frankenergie.smartasset.domain.OrderBook
 import com.frankenergie.smartasset.model.DeliveryPeriod
+import com.frankenergie.smartasset.model.ExecutedPurchase
 import com.frankenergie.smartasset.model.MarketOverviewResponse
+import com.frankenergie.smartasset.model.OrderSide
 import com.frankenergie.smartasset.model.OrderUpdateRequest
 import com.frankenergie.smartasset.model.OrderUpdateResponse
 import com.frankenergie.smartasset.model.QuarterOverview
 import org.springframework.stereotype.Service
+import java.math.BigDecimal
 import java.time.Instant
 import java.util.UUID
 
 @Service
-class OrderBookService {
+class OrderBookService(
+    private val purchaseTrackerService: PurchaseTrackerService
+) {
 
     private val orderBook = OrderBook()
 
@@ -21,13 +26,23 @@ class OrderBookService {
         val period = DeliveryPeriod(request.deliveryStartTime, request.deliveryEndTime)
         val matchedQuantity = orderBook.processOrder(period, request.orderSide, request.quantity, request.price)
 
-        val status = when {
-            matchedQuantity == request.quantity -> "FILLED"
-            matchedQuantity > java.math.BigDecimal.ZERO -> "PARTIALLY_FILLED"
-            else -> "ACCEPTED"
+        if (matchedQuantity > BigDecimal.ZERO && request.orderSide == OrderSide.BUY) {
+            purchaseTrackerService.recordPurchase(
+                ExecutedPurchase(
+                    groupId = "default",
+                    deliveryStart = request.deliveryStartTime,
+                    deliveryEnd = request.deliveryEndTime,
+                    quantity = matchedQuantity,
+                    pricePerMWh = request.price
+                )
+            )
         }
 
-        // TODO: write this to a file
+        val status = when {
+            matchedQuantity == request.quantity -> "FILLED"
+            matchedQuantity > BigDecimal.ZERO -> "PARTIALLY_FILLED"
+            else -> "ACCEPTED"
+        }
 
         return OrderUpdateResponse(orderId = orderId, status = status, timestamp = Instant.now())
     }

src/test/kotlin/com/frankenergie/smartasset/service/OrderBookServiceTest.kt

@@ -11,10 +11,12 @@ import java.time.LocalDateTime
 class OrderBookServiceTest {
 
     private lateinit var service: OrderBookService
+    private lateinit var purchaseTrackerService: PurchaseTrackerService
 
     @BeforeEach
     fun setUp() {
-        service = OrderBookService()
+        purchaseTrackerService = PurchaseTrackerService()
+        service = OrderBookService(purchaseTrackerService)
     }
 
     @Test