item manager: fix active price threshold calculation

This was meant to keep items within 5x of their Jagex price, but the
logic was only correct if activePriceThreshold <= 1.0.

runelite-client/src/main/java/net/runelite/client/game/ItemManager.java

@@ -328,8 +328,7 @@ public class ItemManager
 		{
 			return wikiPrice;
 		}
-		int d = jagPrice - (int) (jagPrice * activePriceThreshold);
-		return wikiPrice >= jagPrice - d && wikiPrice <= jagPrice + d ? wikiPrice : jagPrice;
+		return wikiPrice < jagPrice * activePriceThreshold ? wikiPrice : jagPrice;
 	}
 
 	/**

runelite-client/src/test/java/net/runelite/client/game/ItemManagerTest.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2022, Adam <Adam@sigterm.info>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.runelite.client.game;
+
+import com.google.inject.Guice;
+import com.google.inject.Inject;
+import com.google.inject.testing.fieldbinder.Bind;
+import com.google.inject.testing.fieldbinder.BoundFieldModule;
+import java.util.concurrent.ScheduledExecutorService;
+import javax.inject.Named;
+import net.runelite.api.Client;
+import net.runelite.api.ItemID;
+import net.runelite.client.callback.ClientThread;
+import net.runelite.client.config.RuneLiteConfig;
+import net.runelite.http.api.item.ItemPrice;
+import static org.junit.Assert.assertEquals;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+
+@RunWith(MockitoJUnitRunner.class)
+public class ItemManagerTest
+{
+	@Inject
+	private ItemManager itemManager;
+
+	@Mock
+	@Bind
+	private Client client;
+
+	@Mock
+	@Bind
+	private ScheduledExecutorService scheduledExecutorService;
+
+	@Mock
+	@Bind
+	private ClientThread clientThread;
+
+	@Mock
+	@Bind
+	private ItemClient itemClient;
+
+	@Mock
+	@Bind
+	private RuneLiteConfig runeLiteConfig;
+
+	@Bind
+	@Named("activePriceThreshold")
+	private double activePriceThreshold = 5;
+
+	@Bind
+	@Named("lowPriceThreshold")
+	private int lowPriceThreshold = 1000;
+
+	@Before
+	public void before()
+	{
+		Guice.createInjector(BoundFieldModule.of(this)).injectMembers(this);
+	}
+
+	@Test
+	public void testGetWikiPrice()
+	{
+		ItemPrice itemPrice = new ItemPrice();
+		itemPrice.setId(ItemID.YEW_SEED);
+		itemPrice.setName("Yew seed");
+		itemPrice.setPrice(47_975);
+		itemPrice.setWikiPrice(50_754);
+		assertEquals(itemPrice.getWikiPrice(), itemManager.getWikiPrice(itemPrice));
+
+		itemPrice.setWikiPrice(300_000); // outside of 5x range
+		assertEquals(itemPrice.getPrice(), itemManager.getWikiPrice(itemPrice));
+	}
+}