Solved day 10 part 1

Author: Gentleman1983

build.gradle

@@ -4,7 +4,7 @@ plugins {
 
 // project meta data
 group 'de.havox_design.aoc2015'
-version '0.9.2'
+version '0.9.3'
 
 // Switch to gradle "all" distribution.
 wrapper {

day10/src/main/java/de/havox_design/aoc2015/day10/Elves.java

@@ -0,0 +1,67 @@
+package de.havox_design.aoc2015.day10;
+
+import de.havox_design.aoc2015.utils.DataReader;
+
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Elves {
+    private final String input;
+
+    public Elves(String fileName) {
+        input = readData(fileName).get(0);
+    }
+
+    public static int solvePart1(String fileName) {
+        Elves instance = new Elves(fileName);
+        return instance.solvePart1();
+    }
+
+    public static int solvePart2(String fileName) {
+        Elves instance = new Elves(fileName);
+        return instance.solvePart2();
+    }
+
+    public int solvePart1() {
+        return processForIterations(40).length();
+    }
+
+    public int solvePart2() {
+        return 0;
+    }
+
+    protected String processIteration(String input) {
+        StringBuilder newInput = new StringBuilder();
+
+        int i = 0;
+        while(i < input.length()) {
+            Pattern pattern = Pattern.compile(input.charAt(i) + "+");
+            Matcher matcher = pattern.matcher(input.substring(i));
+
+            if (matcher.find()) {
+                String group = matcher.group(0);
+                i += matcher.group(0).length() - 1;
+                newInput.append(matcher.group(0).length()).append(group.charAt(0));
+            }
+
+            i++;
+        }
+
+        return newInput.toString();
+    }
+
+    protected String processForIterations(int iterations) {
+        String newInput = input;
+
+        for(int i = 0; i < iterations; i++) {
+            newInput = processIteration(newInput);
+        }
+
+        return newInput;
+    }
+
+    private List<String> readData(String fileName) {
+        return DataReader.readData(fileName, MainClass.class);
+    }
+}

day10/src/main/java/de/havox_design/aoc2015/day10/MainClass.java

@@ -6,7 +6,7 @@ public class MainClass {
     private static final Logger LOGGER = Logger.getLogger(MainClass.class.getName());
 
     public static void main(String[] args) {
-        LOGGER.info("Solution 1: 13");
-        LOGGER.info("Solution 2: 23");
+        LOGGER.info(() -> "Solution 1: " + Elves.solvePart1("day10.txt"));
+        LOGGER.info(() -> "Solution 2: " + Elves.solvePart2("day10.txt"));
     }
 }

day10/src/test/java/de/havox_design/aoc2015/day10/Day10Test.java

@@ -1,6 +1,12 @@
 package de.havox_design.aoc2015.day10;
 
+import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.stream.Stream;
 
 class Day10Test {
 
@@ -9,4 +15,44 @@ class Day10Test {
     void testMainClass() {
         MainClass.main(new String[0]);
     }
+
+    @ParameterizedTest
+    @MethodSource("getDataForPart1")
+    void testPart1(String fileName, int expectedResultLength) {
+        Assertions.assertEquals(expectedResultLength, Elves.solvePart1(fileName));
+    }
+
+    private static Stream<Arguments> getDataForPart1() {
+        return Stream.of(
+                Arguments.of("part1sample1.txt", 82350),
+                Arguments.of("part1sample2.txt", 107312)
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("getDataForProcessData")
+    void testProcessData(String fileName, String expectedString, int iterations) {
+        Elves instanceUnderTest = new Elves(fileName);
+        Assertions.assertEquals(expectedString, instanceUnderTest.processForIterations(iterations));
+    }
+
+    private static Stream<Arguments> getDataForProcessData() {
+        return Stream.of(
+                Arguments.of("part1sample1.txt", "11", 1),
+                Arguments.of("part1sample1.txt", "21", 2),
+                Arguments.of("part1sample1.txt", "1211", 3),
+                Arguments.of("part1sample1.txt", "111221", 4),
+                Arguments.of("part1sample1.txt", "312211", 5),
+                Arguments.of("part1sample2.txt", "21", 1),
+                Arguments.of("part1sample2.txt", "1211", 2),
+                Arguments.of("part1sample2.txt", "111221", 3),
+                Arguments.of("part1sample2.txt", "312211", 4),
+                Arguments.of("part1sample3.txt", "1211", 1),
+                Arguments.of("part1sample3.txt", "111221", 2),
+                Arguments.of("part1sample3.txt", "312211", 3),
+                Arguments.of("part1sample4.txt", "111221", 1),
+                Arguments.of("part1sample4.txt", "312211", 2),
+                Arguments.of("part1sample5.txt", "312211", 1)
+        );
+    }
 }