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Add bottle-song exercise (exercism#2507)
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‎config.json‎

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"difficulty": 6,
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"status": "deprecated"
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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": "3fa6750f-cf01-4542-a494-df9a8c658733",
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"practices": [
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"strings"
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],
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"prerequisites": [
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"strings"
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],
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"difficulty": 6
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},
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{
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"slug": "food-chain",
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"name": "Food Chain",

‎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/config.json‎

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{
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"authors": [
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"kahgoh"
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],
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"files": {
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"solution": [
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"src/main/java/BottleSong.java"
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],
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"test": [
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"src/test/java/BottleSongTest.java"
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],
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"example": [
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".meta/src/reference/java/BottleSong.java"
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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/src/reference/java/BottleSong.java‎

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class BottleSong {
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private String word(int number) {
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return switch (number) {
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case 2 -> "two";
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case 3 -> "three";
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case 4 -> "four";
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case 5 -> "five";
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case 6 -> "six";
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case 7 -> "seven";
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case 8 -> "eight";
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case 9 -> "nine";
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case 10 -> "ten";
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default -> throw new IllegalArgumentException("Unrecognised number: " + Integer.toString(number));
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};
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}
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private String verse(int number) {
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return switch (number) {
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case 1 ->
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"One green bottle hanging on the wall,\n" +
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"One green bottle hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be no green bottles hanging on the wall.\n";
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case 2 ->
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"Two green bottles hanging on the wall,\n" +
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"Two green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be one green bottle hanging on the wall.\n";
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default -> {
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var codePoints = word(number).codePoints().toArray();
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codePoints[0] = Character.toUpperCase(codePoints[0]);
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var numberText = new String(codePoints, 0, codePoints.length);
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var nextNumberText = word(number - 1);
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yield String.format(
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"%s green bottles hanging on the wall,\n" +
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"%s green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be %s green bottles hanging on the wall.\n",
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numberText, numberText, nextNumberText);
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}
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};
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}
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String recite(int startBottles, int takeDown) {
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var stop = startBottles - takeDown + 1;
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var output = new StringBuilder();
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for (var i = startBottles; i >= stop; i--) {
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if (i != startBottles) {
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output.append("\n");
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}
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output.append(verse(i));
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}
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return output.toString();
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}
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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.gradle‎

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apply plugin: "java"
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apply plugin: "eclipse"
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apply plugin: "idea"
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// set default encoding to UTF-8
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compileJava.options.encoding = "UTF-8"
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compileTestJava.options.encoding = "UTF-8"
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repositories {
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mavenCentral()
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}
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dependencies {
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testImplementation "junit:junit:4.13"
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testImplementation "org.assertj:assertj-core:3.15.0"
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}
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test {
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testLogging {
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exceptionFormat = 'full'
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showStandardStreams = true
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events = ["passed", "failed", "skipped"]
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}
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}

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

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class BottleSong {
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String recite(int startBottles, int takeDown) {
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throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
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}
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}

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

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import org.junit.Test;
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import org.junit.Ignore;
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import org.junit.Before;
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import static org.assertj.core.api.Assertions.assertThat;
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public class BottleSongTest {
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private BottleSong bottleSong;
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@Before
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public void setup() {
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bottleSong = new BottleSong();
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}
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@Test
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public void firstGenericVerse() {
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assertThat(bottleSong.recite(10, 1)).isEqualTo(
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"Ten green bottles hanging on the wall,\n" +
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"Ten green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be nine green bottles hanging on the wall.\n"
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);
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}
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@Ignore("Remove to run test")
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@Test
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public void lastGenericVerse() {
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assertThat(bottleSong.recite(3, 1)).isEqualTo(
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"Three green bottles hanging on the wall,\n" +
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"Three green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be two green bottles hanging on the wall.\n"
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);
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}
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@Ignore("Remove to run test")
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@Test
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public void verseWithTwoBottles() {
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assertThat(bottleSong.recite(2, 1)).isEqualTo(
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"Two green bottles hanging on the wall,\n" +
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"Two green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be one green bottle hanging on the wall.\n"
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);
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}
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@Ignore("Remove to run test")
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@Test
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public void verseWithOneBottle() {
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assertThat(bottleSong.recite(1, 1)).isEqualTo(
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"One green bottle hanging on the wall,\n" +
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"One green bottle hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be no green bottles hanging on the wall.\n"
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);
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}
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@Ignore("Remove to run test")
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@Test
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public void firstTwoVerses() {
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assertThat(bottleSong.recite(10, 2)).isEqualTo(
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"Ten green bottles hanging on the wall,\n" +
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"Ten green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be nine green bottles hanging on the wall.\n" +
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"\n" +
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"Nine green bottles hanging on the wall,\n" +
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"Nine green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be eight green bottles hanging on the wall.\n"
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);
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}
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@Ignore("Remove to run test")
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@Test
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public void lastThreeVerses() {
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assertThat(bottleSong.recite(3, 3)).isEqualTo(
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"Three green bottles hanging on the wall,\n" +
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"Three green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be two green bottles hanging on the wall.\n" +
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"\n" +
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"Two green bottles hanging on the wall,\n" +
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"Two green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be one green bottle hanging on the wall.\n" +
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"\n" +
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"One green bottle hanging on the wall,\n" +
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"One green bottle hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be no green bottles hanging on the wall.\n"
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);
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}
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@Ignore("Remove to run test")
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@Test
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public void allVerses() {
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assertThat(bottleSong.recite(10, 10))
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.isEqualTo(
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"Ten green bottles hanging on the wall,\n" +
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"Ten green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be nine green bottles hanging on the wall.\n" +
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"\n" +
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"Nine green bottles hanging on the wall,\n" +
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"Nine green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be eight green bottles hanging on the wall.\n" +
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"\n" +
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"Eight green bottles hanging on the wall,\n" +
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"Eight green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be seven green bottles hanging on the wall.\n" +
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"\n" +
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"Seven green bottles hanging on the wall,\n" +
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"Seven green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be six green bottles hanging on the wall.\n" +
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"\n" +
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"Six green bottles hanging on the wall,\n" +
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"Six green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be five green bottles hanging on the wall.\n" +
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"\n" +
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"Five green bottles hanging on the wall,\n" +
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"Five green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be four green bottles hanging on the wall.\n" +
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"\n" +
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"Four green bottles hanging on the wall,\n" +
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"Four green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be three green bottles hanging on the wall.\n" +
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"\n" +
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"Three green bottles hanging on the wall,\n" +
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"Three green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be two green bottles hanging on the wall.\n" +
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"\n" +
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"Two green bottles hanging on the wall,\n" +
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"Two green bottles hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be one green bottle hanging on the wall.\n" +
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"\n" +
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"One green bottle hanging on the wall,\n" +
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"One green bottle hanging on the wall,\n" +
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"And if one green bottle should accidentally fall,\n" +
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"There'll be no green bottles hanging on the wall.\n"
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);
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}
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}

‎exercises/settings.gradle‎

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include 'practice:binary-search-tree'
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include 'practice:bob'
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include 'practice:book-store'
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include 'practice:bottle-song'
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include 'practice:bowling'
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include 'practice:change'
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include 'practice:circular-buffer'

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