add tests

Author: josergdev

build.gradle.kts

@@ -14,6 +14,7 @@ repositories {
 
 dependencies {
     testImplementation(kotlin("test"))
+    testImplementation("org.junit.jupiter:junit-jupiter:5.8.1")
 }
 
 tasks.test {

src/main/kotlin/days/day2.kt

@@ -48,22 +48,18 @@ fun String.parseResult() = when (this) {
     else -> throw IllegalArgumentException(this)
 }
 
-fun neededFor(result: Result, option: Option) = when(result) {
-    Lose -> option.strongAgainst()
+fun neededFor(result: Result, option: Option) = when (result) {
+    Lose -> when (option) {
+        Rock -> Scissors
+        Paper -> Rock
+        Scissors -> Paper
+    }
     Draw -> option
-    Win -> option.weakAgainst()
-}
-
-fun Option.weakAgainst() = when(this) {
-    Rock -> Paper
-    Paper -> Scissors
-    Scissors -> Rock
-}
-
-fun Option.strongAgainst() = when(this) {
-    Rock -> Scissors
-    Paper -> Rock
-    Scissors -> Paper
+    Win -> when (option) {
+        Rock -> Paper
+        Paper -> Scissors
+        Scissors -> Rock
+    }
 }
 
 fun day2part2() = Files.lines(Paths.get("input/2.txt")).asSequence()

src/test/kotlin/days/Day1Test.kt

@@ -0,0 +1,18 @@
+package days
+
+import org.junit.jupiter.api.Test
+
+import org.junit.jupiter.api.Assertions.*
+
+internal class Day1Test {
+
+    @Test
+    fun day1part1Test() {
+        assertEquals(71300, day1part1())
+    }
+
+    @Test
+    fun day1part2Test() {
+        assertEquals(209691, day1part2())
+    }
+}

src/test/kotlin/days/Day2Test.kt

@@ -0,0 +1,18 @@
+package days
+
+import org.junit.jupiter.api.Test
+
+import org.junit.jupiter.api.Assertions.*
+
+internal class Day2Test {
+
+    @Test
+    fun day2Part1Test() {
+        assertEquals(14827, day2Part1())
+    }
+
+    @Test
+    fun day2part2Test() {
+        assertEquals(13889, day2part2())
+    }
+}

src/test/kotlin/days/Day3Test.kt

@@ -0,0 +1,18 @@
+package days
+
+import org.junit.jupiter.api.Test
+
+import org.junit.jupiter.api.Assertions.*
+
+internal class Day3Test {
+
+    @Test
+    fun day3part1Test() {
+    assertEquals(8233, day3part1())
+    }
+
+    @Test
+    fun day3part2Test() {
+    assertEquals(2821, day3part2())
+    }
+}

src/test/kotlin/days/Day4Test.kt

@@ -0,0 +1,18 @@
+package days
+
+import org.junit.jupiter.api.Test
+
+import org.junit.jupiter.api.Assertions.*
+
+internal class Day4Test {
+
+    @Test
+    fun day4part1Test() {
+        assertEquals(487, day4part1())
+    }
+
+    @Test
+    fun day4part2Test() {  
+        assertEquals(849, day4part2())
+    }
+}