test: Add sack util test

src/test/kotlin/util/skyblock/SackUtilTest.kt

@@ -0,0 +1,29 @@
+package moe.nea.firmament.test.util.skyblock
+
+import org.junit.jupiter.api.Assertions
+import org.junit.jupiter.api.Test
+import moe.nea.firmament.test.testutil.ItemResources
+import moe.nea.firmament.util.skyblock.SackUtil
+import moe.nea.firmament.util.skyblock.SkyBlockItems
+
+class SackUtilTest {
+	@Test
+	fun testOneRottenFlesh() {
+		Assertions.assertEquals(
+			listOf(
+				SackUtil.SackUpdate(SkyBlockItems.ROTTEN_FLESH, "Rotten Flesh", 1)
+			),
+			SackUtil.getUpdatesFromMessage(ItemResources.loadText("sacks/gain-rotten-flesh"))
+		)
+	}
+
+	@Test
+	fun testAFewRegularItems() {
+		Assertions.assertEquals(
+			listOf(
+				SackUtil.SackUpdate(SkyBlockItems.ROTTEN_FLESH, "Rotten Flesh", 1)
+			),
+			SackUtil.getUpdatesFromMessage(ItemResources.loadText("sacks/gain-and-lose-regular"))
+		)
+	}
+}