day 1 puzzle 1

tests/day1/Puzzle1Tester.scala

@@ -0,0 +1,9 @@
+package day1
+
+import org.scalatest.funsuite.AnyFunSuite
+
+class Puzzle1Tester extends AnyFunSuite {
+  test("Puzzle1.loadInput") {
+    assert(Puzzle1.loadInput("tests_res/day1/input1.txt") == 142)
+  }
+}