java/2016/18: add solution for part 2

Author: saser

java/src/main/java/com/github/saser/adventofcode/year2016/day18/Day18.java

@@ -19,7 +19,7 @@ private static Result solve(Reader r, int part) {
         var state = Day18.parse(r);
         var states = Stream.iterate(state, Day18::next);
         var sum = states
-                .limit(40)
+                .limit(part == 1 ? 40 : 400000)
                 .mapToInt(Day18::count)
                 .sum();
         return Result.ok(Integer.toString(sum));

java/src/test/java/com/github/saser/adventofcode/year2016/day18/Day18Test.java

@@ -17,22 +17,13 @@ public void part1Actual() throws IOException {
         }
     }
 
-    // @Test
-    // public void part2Example() {
-    //     var input = new StringReader("");
-    //     var output = "";
-    //     var result = Day18.part2(input);
-    //     Assert.assertEquals("no error", "", result.error);
-    //     Assert.assertEquals("correct output", output, result.answer);
-    // }
-
-    // @Test
-    // public void part2Actual() throws IOException {
-    //     try (var input = new FileReader("inputs/2016/18")) {
-    //         var output = "";
-    //         var result = Day18.part2(input);
-    //         Assert.assertEquals("no error", "", result.error);
-    //         Assert.assertEquals("correct output", output, result.answer);
-    //     }
-    // }
+     @Test
+     public void part2Actual() throws IOException {
+         try (var input = new FileReader("inputs/2016/18")) {
+             var output = "19998750";
+             var result = Day18.part2(input);
+             Assert.assertEquals("no error", "", result.error);
+             Assert.assertEquals("correct output", output, result.answer);
+         }
+     }
 }