Add solution and spec files for elyses-transformative-enchantments (#997)

Co-authored-by: Tejas Bubane <tejasbubane@gmail.com>

Author: SleeplessByte

exercises/concept/elyses-transformative-enchantments/.meta/config.json

@@ -7,8 +7,8 @@
     }
   ],
   "files": {
-    "solution": [],
-    "test": [],
-    "exemplar": [".meta/exemplar.js"]
+    "solution": ["enchantments.js"],
+    "test": ["enchantments.spec.js"],
+    "exemplar": ["exemplar.js"]
   }
 }

exercises/concept/elyses-transformative-enchantments/enchantments.js

@@ -0,0 +1,78 @@
+/**
+ * Double every card in the deck
+ *
+ * @param {number[]} deck
+ *
+ * @returns {number[]} deck with every card doubled
+ */
+export function seeingDouble(deck) {
+  throw new Error('Implement the seeingDouble function');
+}
+
+/**
+ *  Creates triplicates of every 3 found in the deck
+ *
+ * @param {number[]} deck
+ *
+ * @returns {number[]} deck with triplicate 3s
+ */
+export function threeOfEachThree(deck) {
+  throw new Error('Implement the threeOfEachThree function');
+}
+
+/**
+ * Removes every card from the deck but the middle two
+ * Assumes a deck is always 10 cards
+ *
+ * @param {number[]} deck of 10 cards
+ *
+ * @returns {number[]} deck with only two middle cards
+ */
+export function middleTwo(deck) {
+  throw new Error('Implement the middleTwo function');
+}
+
+/**
+ * Moves the outside two cards to the middle
+ *
+ * @param {number[]} deck with 10 cards
+ *
+ * @returns {number[]} transformed deck
+ */
+
+export function sandwichTrick(deck) {
+  throw new Error('Implement the sandwichTrick function');
+}
+
+/**
+ * Removes every card from the deck except 2s
+ *
+ * @param {number[]} deck
+ *
+ * @returns {number[]} deck with only 2s
+ */
+export function twoIsSpecial(deck) {
+  throw new Error('Implement the twoIsSpecial function');
+}
+
+/**
+ * Returns a perfectly order deck from lowest to highest
+ *
+ * @param {number[]} shuffled deck
+ *
+ * @returns {number[]} ordered deck
+ */
+export function perfectlyOrdered(deck) {
+  throw new Error('Implement the perfectlyOrdered function');
+}
+
+/**
+ * Returns a deck with every card equal to the total number of cards
+ *
+ * @param {number[]} deck
+ *
+ * @returns {number[]} deck
+ */
+export function countingCards(deck) {
+  throw new Error('Implement the countingCards function');
+}

exercises/concept/elyses-transformative-enchantments/enchantments.spec.js

@@ -0,0 +1,175 @@
+// @ts-check
+
+/**
+ * @template T
+ * @template Expected
+ * @typedef {[T, Expected]} TestCase
+ */
+
+/**
+ * @template T
+ * @template Expected
+ * @typedef {TestCase<T, Expected>[]} TestCases
+ */
+
+import {
+  seeingDouble,
+  threeOfEachThree,
+  middleTwo,
+  sandwichTrick,
+  twoIsSpecial,
+  perfectlyOrdered,
+  countingCards,
+} from './enchantments';
+
+describe('array', () => {
+  describe('seeingDouble', () => {
+    /** @type {TestCases<Card[], Card[]>} */
+    const seeingDoubleTestCases = [
+      [[], []],
+      [[3], [6]],
+      [
+        [1, 2, 3, 4],
+        [2, 4, 6, 8],
+      ],
+      [
+        [2, 5, 1, 9],
+        [4, 10, 2, 18],
+      ],
+    ];
+
+    seeingDoubleTestCases.forEach(([deck, expected]) => {
+      test(`seeingDouble([${deck}])`, () => {
+        expect(seeingDouble(deck)).toStrictEqual(expected);
+      });
+    });
+  });
+
+  describe('threeOfEachThree', () => {
+    /** @type {TestCases<Card[], Card[]>} */
+    const threeOfEachThreeTestCases = [
+      [[], []],
+      [[3], [3, 3, 3]],
+      [[2], [2]],
+      [
+        [1, 3, 9, 3, 7],
+        [1, 3, 3, 3, 9, 3, 3, 3, 7],
+      ],
+    ];
+
+    threeOfEachThreeTestCases.forEach(([deck, expected]) => {
+      test(`threeOfEachThree([${deck}])`, () => {
+        expect(threeOfEachThree(deck)).toStrictEqual(expected);
+      });
+    });
+  });
+
+  describe('middleTwo', () => {
+    /** @type {TestCases<Card[], Card[]>} */
+    const middleTwoTestCases = [
+      [
+        [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
+        [5, 6],
+      ],
+      [
+        [12, 2, 36, 45, 15, 96, 27, 86, 1, 29],
+        [15, 96],
+      ],
+    ];
+
+    middleTwoTestCases.forEach(([deck, expected]) => {
+      test(`middleTwo([${deck}])`, () => {
+        expect(middleTwo(deck)).toStrictEqual(expected);
+      });
+    });
+  });
+
+  describe('sandwichTrick', () => {
+    /** @type {TestCases<Card[], Card[]>} */
+    const sandwichTrickTestCases = [
+      [
+        [1, 2, 3, 5, 6, 10],
+        [2, 3, 10, 1, 5, 6],
+      ],
+      [
+        [12, 3, 5, 87],
+        [3, 87, 12, 5],
+      ],
+    ];
+
+    sandwichTrickTestCases.forEach(([deck, expected]) => {
+      test(`sandwichTrick([${deck}])`, () => {
+        expect(sandwichTrick(deck)).toStrictEqual(expected);
+      });
+    });
+  });
+
+  describe('twoIsSpecial', () => {
+    /** @type {TestCases<Card[], Card[]>} */
+    const twoIsSpecialTestCases = [
+      [[], []],
+      [[1, 9, 1], []],
+      [[1, 2, 9, 1], [2]],
+      [
+        [121, 22, 9, 12, 2, 2, 2, 23, 2],
+        [2, 2, 2, 2],
+      ],
+    ];
+
+    twoIsSpecialTestCases.forEach(([deck, expected]) => {
+      test(`twoIsSpecial([${deck}])`, () => {
+        expect(twoIsSpecial(deck)).toStrictEqual(expected);
+      });
+    });
+  });
+
+  describe('perfectlyOrdered', () => {
+    /** @type {TestCases<Card[], Card[]>} */
+    const perfectlyOrderedTestCases = [
+      [[], []],
+      [
+        [1, 9, 1],
+        [1, 1, 9],
+      ],
+      [
+        [1, 2, 9, 1],
+        [1, 1, 2, 9],
+      ],
+      [
+        [10, 1, 5, 3, 2, 8, 7],
+        [1, 2, 3, 5, 7, 8, 10],
+      ],
+    ];
+
+    perfectlyOrderedTestCases.forEach(([deck, expected]) => {
+      test(`perfectlyOrdered([${deck}])`, () => {
+        expect(perfectlyOrdered(deck)).toStrictEqual(expected);
+      });
+    });
+  });
+
+  describe('countingCards', () => {
+    /** @type {TestCases<Card[], Card[]>} */
+    const countingCardsTestCases = [
+      [[], []],
+      [
+        [1, 9, 1],
+        [3, 3, 3],
+      ],
+      [
+        [1, 2, 9, 1],
+        [4, 4, 4, 4],
+      ],
+      [
+        [121, 22, 9, 12, 2, 2, 23],
+        [7, 7, 7, 7, 7, 7, 7],
+      ],
+    ];
+
+    countingCardsTestCases.forEach(([deck, expected]) => {
+      test(`countingCards([${deck}])`, () => {
+        expect(countingCards(deck)).toStrictEqual(expected);
+      });
+    });
+  });
+});

exercises/concept/elyses-transformative-enchantments/.meta/exemplar.js renamed to exercises/concept/elyses-transformative-enchantments/exemplar.js

@@ -39,7 +39,7 @@ export function middleTwo(deck) {
   // TODO: which implementation?
   // const middle = Math.floor(deck.length / 2)
   // return deck.slice(middle,  middle + 1)
-  return deck.slice(4, 5);
+  return deck.slice(4, 6);
 }
 
 /**
@@ -53,7 +53,9 @@ export function middleTwo(deck) {
 export function sandwichTrick(deck) {
   const firstCard = deck.shift();
   const lastCard = deck.pop();
-  return deck.splice(3, 0, lastCard, firstCard);
+  const mid = deck.length / 2;
+  deck.splice(mid, 0, lastCard, firstCard);
+  return deck;
 }
 
 /**
@@ -75,7 +77,7 @@ export function twoIsSpecial(deck) {
  * @returns {number[]} ordered deck
  */
 export function perfectlyOrdered(deck) {
-  return deck.sort();
+  return deck.sort((a, b) => a - b);
 }
 
 /**