plural support

Author: sovdeeth

src/main/java/ch/njol/skript/expressions/ExprFirstEmptySlot.java

@@ -16,8 +16,8 @@ public class ExprFirstEmptySlot extends SimplePropertyExpression<Inventory, Slot
 
 	static {
 		// support `first empty slot in inventory` as well as typical property syntax
-		List<String> patterns = new ArrayList<>(Arrays.asList(getPatterns("first empty slot", "inventory")));
-		patterns.add("[the] first empty slot in %inventory%");
+		List<String> patterns = new ArrayList<>(Arrays.asList(getPatterns("first empty slot[s]", "inventories")));
+		patterns.add("[the] first empty slot[s] in %inventories%");
 		Skript.registerExpression(ExprFirstEmptySlot.class, Slot.class, ExpressionType.PROPERTY, patterns.toArray(new String[0]));
 	}
 

src/test/skript/tests/syntaxes/expressions/ExprFirstEmptySlot.sk

@@ -11,3 +11,8 @@ test "first empty slot":
 	set first empty slot of {_inv} to diamond sword
 	assert slot 2 of {_inv} is a diamond sword with "First empty slot should be set to diamond sword"
 	assert the index of the first empty slot in {_inv} is 4 with "First empty slot in inventory should be 4"
+
+	set {_inv2} to a hopper inventory named "Test Hopper"
+	set the first empty slots in {_inv2} and {_inv} to diamond sword
+	assert slot 0 of {_inv2} is a diamond sword with "First empty slot in hopper inventory should be set to diamond sword"
+	assert slot 4 of {_inv} is a diamond sword with "First empty slot in chest inventory should be set to diamond sword"