Simplify structure and tests

Author: hsz

src/main/kotlin/com/github/hsz/aoc/Day.kt

@@ -2,11 +2,15 @@ package com.github.hsz.aoc
 
 import com.github.hsz.aoc.utils.Resources
 
-abstract class Day(val number: Number) {
+abstract class Day(number: Number) {
 
- val input = Resources.asString("day${number.toString().padStart(2, '0')}.txt")
+ private val input = Resources.asString("day${number.toString().padStart(2, '0')}.txt")
 
  abstract fun part1(input: String): Any
 
+ fun part1() = part1(input)
+
  abstract fun part2(input: String): Any
+
+ fun part2() = part2(input)
 }

src/main/kotlin/com/github/hsz/aoc/Day01.kt

@@ -1,6 +1,7 @@
 package com.github.hsz.aoc
 
 class Day01 : Day(1) {
+
  override fun part1(input: String): Int {
  return 0
  }

src/main/kotlin/com/github/hsz/aoc/utils/utils.kt

@@ -1,11 +1,14 @@
-package com.github.hsz.aoc
+package com.github.hsz.aoc.utils
+
+import java.math.BigInteger
+import java.security.MessageDigest
 
 /**
  * Maps a string containing integers in new lines to a list of integers.
  */
-fun String.ints(): List<Int> = lines().map(String::toInt)
+fun String.ints() = lines().map(String::toInt)
 
 /**
- * Shorthand for [String.toInt].
+ * Converts string to md5 hash.
  */
-operator fun String.unaryPlus() = toInt()
+fun String.md5(): String = BigInteger(1, MessageDigest.getInstance("MD5").digest(toByteArray())).toString(16)

src/test/kotlin/com/github/hsz/aoc/Day01Test.kt

@@ -3,15 +3,19 @@ package com.github.hsz.aoc
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
-class Day01Test : DayTest(Day01()) {
+class Day01Test : DayTest() {
+
+ override val day = Day01()
+
  @Test
  fun part1() {
- assertEquals(0, day.part1(""))
+ assertEquals(0, day.part1("foo")) // check against test input
+ assertEquals(0, day.part1()) // check against input data
  }
 
  @Test
  fun part2() {
- assertEquals(0, day.part2(""))
- assertEquals(0, day.part2(day.input))
+ assertEquals(0, day.part2("bar"))
+ assertEquals(0, day.part2())
  }
 }

src/test/kotlin/com/github/hsz/aoc/DayTest.kt

@@ -3,14 +3,7 @@ package com.github.hsz.aoc
 import org.junit.jupiter.api.AfterAll
 import org.junit.jupiter.api.TestInstance
 
-@TestInstance(TestInstance.Lifecycle.PER_CLASS)
-abstract class DayTest(val day: Day) {
- @AfterAll
- fun solve() {
- with(day) {
- println("Solutions for Day $number:")
- println("Part 1: ${part1(input)}")
- println("Part 2: ${part2(input)}")
- }
- }
+abstract class DayTest {
+
+ abstract val day: Day
 }