Scala day 01

exercise/scala/day01/.gitignore

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+# macOS
+.DS_Store
+
+# sbt specific
+dist/*
+target/
+lib_managed/
+src_managed/
+project/boot/
+project/plugins/project/
+project/local-plugins.sbt
+.history
+.ensime
+.ensime_cache/
+.sbt-scripted/
+local.sbt
+
+# Bloop
+.bsp
+
+# VS Code
+.vscode/
+
+# Metals
+.bloop/
+.metals/
+metals.sbt
+
+# IDEA
+.idea
+.idea_modules
+/.worksheet/

exercise/scala/day01/.scalafmt.conf

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+maxColumn = 120

exercise/scala/day01/build.sbt

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+val scala3Version = "3.4.2"
+
+lazy val root = project
+  .in(file("."))
+  .settings(
+    name := "day01",
+    version := "0.1.0-SNAPSHOT",
+
+    scalaVersion := scala3Version,
+
+    libraryDependencies += "org.scalameta" %% "munit" % "1.0.0" % Test
+  )

exercise/scala/day01/project/build.properties

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+sbt.version=1.10.0

exercise/scala/day01/src/main/scala/Food.scala

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+import java.time.LocalDate
+import java.util.UUID
+
+case class Food(
+    expirationDate: LocalDate,
+    approvedForConsumption: Boolean,
+    insperctorId: Option[UUID]
+) {
+  def isEdible(now: LocalDate): Boolean =
+    expirationDate.isAfter(now) &&
+      approvedForConsumption &&
+      this.insperctorId.nonEmpty
+}

exercise/scala/day01/src/test/scala/FoodSpec.scala

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+import java.time.LocalDate
+import java.util.UUID.randomUUID
+import java.time.LocalDate.of
+import java.util.UUID
+
+
+class FoodSpec extends munit.FunSuite {
+
+  private val expirationDate = of(2023, 12, 1)
+  private val inspector = randomUUID()
+  private val notFreshDate = expirationDate.plusDays(7)
+  private val freshDate = expirationDate.minusDays(7)
+
+  test("not edible food") {
+    val res = notEdibleFood
+      .forall {
+        case (bool, maybeUuid, now) => !Food(expirationDate, bool, maybeUuid).isEdible(now)
+      }
+    assert(res)
+  }
+
+  test("edible food") {
+    assert(Food(expirationDate, true, Some(inspector)).isEdible(freshDate))
+  }
+
+  def notEdibleFood: List[(Boolean, Option[UUID], LocalDate)] = List(
+    (true, Some(inspector), notFreshDate),
+    (false, Some(inspector), freshDate),
+    (true, None, freshDate),
+    (false, None, notFreshDate),
+    (false, None, freshDate)
+  )
+}

solution/scala/day01/.gitignore

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+# macOS
+.DS_Store
+
+# sbt specific
+dist/*
+target/
+lib_managed/
+src_managed/
+project/boot/
+project/plugins/project/
+project/local-plugins.sbt
+.history
+.ensime
+.ensime_cache/
+.sbt-scripted/
+local.sbt
+
+# Bloop
+.bsp
+
+# VS Code
+.vscode/
+
+# Metals
+.bloop/
+.metals/
+metals.sbt
+
+# IDEA
+.idea
+.idea_modules
+/.worksheet/

solution/scala/day01/.scalafmt.conf

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+maxColumn = 120

solution/scala/day01/build.sbt

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+val scala3Version = "3.4.2"
+
+lazy val root = project
+  .in(file("."))
+  .settings(
+    name := "day01",
+    version := "0.1.0-SNAPSHOT",
+
+    scalaVersion := scala3Version,
+
+    libraryDependencies += "org.scalameta" %% "munit" % "1.0.0" % Test
+  )

solution/scala/day01/project/build.properties

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+sbt.version=1.10.0

solution/scala/day01/src/main/scala/Food.scala

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+import java.time.LocalDate
+import java.util.UUID
+
+case class Food(
+    expirationDate: LocalDate,
+    approvedForConsumption: Boolean,
+    insperctorId: Option[UUID]
+) {
+  def isEdible(now: LocalDate): Boolean =
+    isFresh(now) &&
+      hasBeenInspected &&
+      canBeConsumed
+
+  private def isFresh(now: LocalDate): Boolean = {
+    expirationDate.isAfter(now)
+  }
+
+  private def hasBeenInspected: Boolean = {
+    insperctorId.nonEmpty
+  }
+
+  private def canBeConsumed: Boolean = {
+    approvedForConsumption
+  }
+
+}

solution/scala/day01/src/test/scala/FoodSpec.scala

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+import java.time.LocalDate
+import java.time.LocalDate.of
+import java.util.UUID
+import java.util.UUID.randomUUID
+
+
+class FoodSpec extends munit.FunSuite {
+
+  private val expirationDate = of(2023, 12, 1)
+  private val inspector = randomUUID()
+  private val notFreshDate = expirationDate.plusDays(7)
+  private val freshDate = expirationDate.minusDays(7)
+
+  test("not edible food") {
+    val res = notEdibleFood
+      .forall {
+        case (bool, maybeUuid, now) => !Food(expirationDate, bool, maybeUuid).isEdible(now)
+      }
+    assert(res)
+  }
+
+  test("edible food") {
+    assert(Food(expirationDate, true, Some(inspector)).isEdible(freshDate))
+  }
+
+  def notEdibleFood: List[(Boolean, Option[UUID], LocalDate)] = List(
+    (true, Some(inspector), notFreshDate),
+    (false, Some(inspector), freshDate),
+    (true, None, freshDate),
+    (false, None, notFreshDate),
+    (false, None, freshDate)
+  )
+}