Updated unknownSizeToTuple to handle single element list

Author: Callum Gibbons

scala-core-collections-modules/scala-core-collections-4/src/main/scala/com/baeldung/scala/listtotuple/ConvertListToTuple.scala

@@ -17,6 +17,7 @@ object ConvertListToTuple {
     list match {
       case first :: second :: third :: _ => (first, second, third)
       case first :: second :: _          => (first, second)
+      case first :: _                    => Tuple1(first)
       case _                             => ("", "")
     }
   }

scala-core-collections-modules/scala-core-collections-4/src/test/scala/com/baeldung/scala/listtotuple/ConvertListToTupleUnitTest.scala

@@ -42,6 +42,11 @@ class ConvertListToTupleUnitTest extends AnyFlatSpec with Matchers {
     ConvertListToTuple.unknownSizeToTuple(testList) shouldBe ("", "")
   }
 
+  "unknownSizeToTuple" should "convert list of 1 element to tuple1" in {
+    val testList = List("Hello")
+    ConvertListToTuple.unknownSizeToTuple(testList) shouldBe Tuple1("Hello")
+  }
+
   "unknownSizeToTuple" should "convert list of 2 elements to tuple2" in {
     val testList = List("Hello", "world")
     ConvertListToTuple.unknownSizeToTuple(testList) shouldBe ("Hello", "world")