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Bottle song (#857)
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‎config.json

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"practices": [],
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"prerequisites": [],
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"difficulty": 3
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},
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{
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"slug": "bottle-song",
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"name": "Bottle Song",
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"uuid": "0c786feb-8653-4215-9281-2e1c83afeefe",
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"practices": [],
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"prerequisites": [],
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"difficulty": 3
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}
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]
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},

‎exercises/practice/bottle-song/.docs/instructions.md

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# Instructions
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Recite the lyrics to that popular children's repetitive song: Ten Green Bottles.
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Note that not all verses are identical.
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```text
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Ten green bottles hanging on the wall,
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Ten green bottles hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be nine green bottles hanging on the wall.
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Nine green bottles hanging on the wall,
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Nine green bottles hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be eight green bottles hanging on the wall.
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Eight green bottles hanging on the wall,
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Eight green bottles hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be seven green bottles hanging on the wall.
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Seven green bottles hanging on the wall,
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Seven green bottles hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be six green bottles hanging on the wall.
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Six green bottles hanging on the wall,
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Six green bottles hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be five green bottles hanging on the wall.
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Five green bottles hanging on the wall,
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Five green bottles hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be four green bottles hanging on the wall.
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Four green bottles hanging on the wall,
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Four green bottles hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be three green bottles hanging on the wall.
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Three green bottles hanging on the wall,
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Three green bottles hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be two green bottles hanging on the wall.
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Two green bottles hanging on the wall,
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Two green bottles hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be one green bottle hanging on the wall.
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One green bottle hanging on the wall,
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One green bottle hanging on the wall,
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And if one green bottle should accidentally fall,
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There'll be no green bottles hanging on the wall.
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```

‎exercises/practice/bottle-song/.meta/Example.scala

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object BottleSong:
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private val numbers = List("no", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten")
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private def suffix(bottles: Int) = if bottles == 1 then "" else "s"
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private def hanging(bottles: Int) =
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s"${numbers(bottles)} green bottle${suffix(bottles)} hanging on the wall"
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private def firstLine(bottles: Int) = hanging(bottles) + ",\n"
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private def lastLine(bottles: Int) = "There'll be " + hanging(bottles).toLowerCase + ".\n"
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private def verse(bottles: Int) = firstLine(bottles).repeat(2) +
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"And if one green bottle should accidentally fall,\n" + lastLine(bottles - 1)
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def recite(startBottles: Int, takeDown: Int): String =
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startBottles until startBottles - takeDown by -1 map verse mkString "\n"

‎exercises/practice/bottle-song/.meta/config.json

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{
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"authors": [
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"rabestro"
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],
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"files": {
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"solution": [
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"src/main/scala/BottleSong.scala"
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],
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"test": [
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"src/test/scala/BottleSongTest.scala"
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],
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"example": [
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".meta/Example.scala"
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]
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},
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"blurb": "Produce the lyrics to the popular children's repetitive song: Ten Green Bottles.",
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"source": "Wikipedia",
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"source_url": "https://en.wikipedia.org/wiki/Ten_Green_Bottles"
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}

‎exercises/practice/bottle-song/.meta/tests.toml

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# This is an auto-generated file.
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#
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# Regenerating this file via `configlet sync` will:
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# - Recreate every `description` key/value pair
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# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
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# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
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# - Preserve any other key/value pair
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#
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# As user-added comments (using the # character) will be removed when this file
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# is regenerated, comments can be added via a `comment` key.
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[d4ccf8fc-01dc-48c0-a201-4fbeb30f2d03]
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description = "verse -> single verse -> first generic verse"
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[0f0aded3-472a-4c64-b842-18d4f1f5f030]
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description = "verse -> single verse -> last generic verse"
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[f61f3c97-131f-459e-b40a-7428f3ed99d9]
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description = "verse -> single verse -> verse with 2 bottles"
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[05eadba9-5dbd-401e-a7e8-d17cc9baa8e0]
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description = "verse -> single verse -> verse with 1 bottle"
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[a4a28170-83d6-4dc1-bd8b-319b6abb6a80]
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description = "lyrics -> multiple verses -> first two verses"
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[3185d438-c5ac-4ce6-bcd3-02c9ff1ed8db]
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description = "lyrics -> multiple verses -> last three verses"
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[28c1584a-0e51-4b65-9ae2-fbc0bf4bbb28]
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description = "lyrics -> multiple verses -> all verses"

‎exercises/practice/bottle-song/build.sbt

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scalaVersion := "3.4.2"
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libraryDependencies += "org.scalatest" %% "scalatest" % "3.2.19" % Test

‎exercises/practice/bottle-song/project/build.properties

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sbt.version=1.10.1

‎exercises/practice/bottle-song/src/main/scala/BottleSong.scala

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object BottleSong:
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def recite(startBottles: Int, takeDown: Int): String = ???

‎exercises/practice/bottle-song/src/test/scala/BottleSongTest.scala

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import org.scalatest.funsuite.AnyFunSuite
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import org.scalatest.matchers.should.Matchers
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class BottleSongTest extends AnyFunSuite with Matchers {
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test("first generic verse") {
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BottleSong.recite(10, 1) shouldBe
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"""Ten green bottles hanging on the wall,
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|Ten green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be nine green bottles hanging on the wall.
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|""".stripMargin.trim + "\n"
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}
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test("last generic verse") {
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pending
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BottleSong.recite(3, 1) shouldBe
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"""Three green bottles hanging on the wall,
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|Three green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be two green bottles hanging on the wall.
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|""".stripMargin.trim + "\n"
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}
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test("verse with two bottles") {
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pending
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BottleSong.recite(2, 1) shouldBe
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"""Two green bottles hanging on the wall,
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|Two green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be one green bottle hanging on the wall.
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|""".stripMargin.trim + "\n"
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}
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test("verse with one bottle") {
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pending
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BottleSong.recite(1, 1) shouldBe
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"""One green bottle hanging on the wall,
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|One green bottle hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be no green bottles hanging on the wall.
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|""".stripMargin.trim + "\n"
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}
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test("first two verses") {
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pending
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BottleSong.recite(10, 2) shouldBe
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"""Ten green bottles hanging on the wall,
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|Ten green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be nine green bottles hanging on the wall.
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|
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|Nine green bottles hanging on the wall,
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|Nine green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be eight green bottles hanging on the wall.
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|""".stripMargin.trim + "\n"
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}
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test("last three verses") {
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pending
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BottleSong.recite(3, 3) shouldBe
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"""Three green bottles hanging on the wall,
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|Three green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be two green bottles hanging on the wall.
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|
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|Two green bottles hanging on the wall,
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|Two green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be one green bottle hanging on the wall.
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|
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|One green bottle hanging on the wall,
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|One green bottle hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be no green bottles hanging on the wall.
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|""".stripMargin.trim + "\n"
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}
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test("all verses") {
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pending
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BottleSong.recite(10, 10) shouldBe
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"""Ten green bottles hanging on the wall,
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|Ten green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be nine green bottles hanging on the wall.
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|
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|Nine green bottles hanging on the wall,
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|Nine green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be eight green bottles hanging on the wall.
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|
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|Eight green bottles hanging on the wall,
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|Eight green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be seven green bottles hanging on the wall.
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|
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|Seven green bottles hanging on the wall,
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|Seven green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be six green bottles hanging on the wall.
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|
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|Six green bottles hanging on the wall,
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|Six green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be five green bottles hanging on the wall.
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|
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|Five green bottles hanging on the wall,
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|Five green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be four green bottles hanging on the wall.
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|
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|Four green bottles hanging on the wall,
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|Four green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be three green bottles hanging on the wall.
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|
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|Three green bottles hanging on the wall,
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|Three green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be two green bottles hanging on the wall.
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|
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|Two green bottles hanging on the wall,
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|Two green bottles hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be one green bottle hanging on the wall.
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|
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|One green bottle hanging on the wall,
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|One green bottle hanging on the wall,
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|And if one green bottle should accidentally fall,
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|There'll be no green bottles hanging on the wall.
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|""".stripMargin.trim + "\n"
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}
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}

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