day 9 puzzle 2

tests/day9/Puzzle2Test.scala

@@ -0,0 +1,9 @@
+package day9
+
+import org.scalatest.funsuite.AnyFunSuite
+
+class Puzzle2Test extends AnyFunSuite {
+  test("Puzzle2.solve") {
+    assert(Puzzle2.solve("tests_res/day9/input1.txt") == 2)
+  }
+}