Solved task for day 2 part 2

Author: Gentleman1983

build.gradle

@@ -4,7 +4,7 @@ plugins {
 
 // project meta data
 group 'de.havox_design.aoc2015'
-version '0.1.3'
+version '0.1.4'
 
 // Switch to gradle "all" distribution.
 wrapper {

day02/src/main/java/de/havox_design/aoc2015/day02/Dimensions.java

@@ -25,6 +25,20 @@ public List<Integer> getSides() {
         return data;
     }
 
+    public List<Integer> getBothSmallerLengths() {
+        ArrayList<Integer> dimensions = new ArrayList<>(List.of(length, width, height));
+        int maximum = dimensions.stream().max(Integer::compareTo).orElseThrow(() -> new IllegalStateException("This should never happen..."));
+
+        for (int i = 0; i < dimensions.size(); i++) {
+            if (dimensions.get(i) == maximum) {
+                dimensions.remove(i);
+                break;
+            }
+        }
+
+        return dimensions;
+    }
+
     public static Dimensions getForDataRow(String dataRow) {
         if (dataRow == null || dataRow.isEmpty()) {
             throw new IllegalArgumentException("Expected data row to have format of LxWxH with L=length, W=width, H=height.");

day02/src/main/java/de/havox_design/aoc2015/day02/WrappingPaper.java

@@ -38,7 +38,19 @@ public int solvePart1() {
     }
 
     public int solvePart2() {
-        return 0;
+        int amount = 0;
+
+        for (String dataRow : input) {
+            Dimensions current = parseDimensions(dataRow);
+
+            for (int length : current.getBothSmallerLengths()) {
+                amount += 2 * length;
+            }
+
+            amount += current.length() * current.width() * current.height();
+        }
+
+        return amount;
     }
 
     private Dimensions parseDimensions(String dataRow) {

day02/src/test/java/de/havox_design/aoc2015/day02/Day02Test.java

@@ -24,9 +24,23 @@ void testPart1(String fileName, int expectedSquareFoots) {
 
     private static Stream<Arguments> getDataForPart1() {
         return Stream.of(
-                Arguments.of("part1sample1.txt", 58),
-                Arguments.of("part1sample2.txt", 43),
-                Arguments.of("part1sample3.txt", 101)
+                Arguments.of("sample1.txt", 58),
+                Arguments.of("sample2.txt", 43),
+                Arguments.of("sample3.txt", 101)
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("getDataForPart2")
+    void testPart2(String fileName, int expectedLengthOfRibbon) {
+        Assertions.assertEquals(expectedLengthOfRibbon, WrappingPaper.solvePart2(fileName));
+    }
+
+    private static Stream<Arguments> getDataForPart2() {
+        return Stream.of(
+                Arguments.of("sample1.txt", 34),
+                Arguments.of("sample2.txt", 14),
+                Arguments.of("sample3.txt", 48)
         );
     }
 }