Solved day 4 part 2

Author: Gentleman1983

build.gradle

@@ -4,7 +4,7 @@ plugins {
 
 // project meta data
 group 'de.havox_design.aoc2015'
-version '0.3.4'
+version '0.3.5'
 
 // Switch to gradle "all" distribution.
 wrapper {

day04/src/main/java/de/havox_design/aoc2015/day04/AdventCoins.java

@@ -23,22 +23,26 @@ public static int solvePart2(String fileName) {
     }
 
     public int solvePart1() {
+        return detectSecretNumberForHashStart("00000");
+    }
+
+    public int solvePart2() {
+        return detectSecretNumberForHashStart("000000");
+    }
+
+    private int detectSecretNumberForHashStart(String prefix) {
         for(int i = 0; i < Integer.MAX_VALUE; i++) {
             String combinedKey = input + i;
             String md5Hash = DigestUtils.md5Hex(combinedKey);
 
-            if(md5Hash.startsWith("00000")) {
+            if(md5Hash.startsWith(prefix)) {
                 return i;
             }
         }
 
         throw new IllegalStateException("An valid hash should be able to be found.");
     }
 
-    public int solvePart2() {
-        return 0;
-    }
-
     private List<String> readData(String fileName) {
         return DataReader.readData(fileName, MainClass.class);
     }

day04/src/test/java/de/havox_design/aoc2015/day04/Day04Test.java

@@ -24,8 +24,21 @@ void testPart1(String fileName, int expectedSecretNumber) {
 
     private static Stream<Arguments> getDataForPart1() {
         return Stream.of(
-                Arguments.of("part1sample1.txt", 609043),
-                Arguments.of("part1sample2.txt", 1048970)
+                Arguments.of("sample1.txt", 609043),
+                Arguments.of("sample2.txt", 1048970)
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("getDataForPart2")
+    void testPart2(String fileName, int expectedSecretNumber) {
+        Assertions.assertEquals(expectedSecretNumber, AdventCoins.solvePart2(fileName));
+    }
+
+    private static Stream<Arguments> getDataForPart2() {
+        return Stream.of(
+                Arguments.of("sample1.txt", 6742839),
+                Arguments.of("sample2.txt", 5714438)
         );
     }
 }