Add Gilded Rose kata for JavaScript with Jest

js-jest/.gitignore

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+/node_modules/

js-jest/README.md

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+# Gilded Rose
+
+This is the Gilded Rose kata in JavaScript with Jest
+
+## Getting started
+
+Install dependencies
+
+```sh
+npm install
+```
+
+## Running tests
+
+To run all tests
+
+```sh
+npm test
+```
+
+To run all tests in watch mode
+
+```sh
+npm run test:watch
+```
+
+To generate test coverage report
+
+```sh
+npm run test:coverage
+```

js-jest/package.json

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+{
+  "name": "gilded-rose-kata",
+  "version": "1.0.0",
+  "description": "Gilded Rose kata in JavaScript with Jest",
+  "scripts": {
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:coverage": "jest --coverage"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/emilybache/GildedRose-Refactoring-Kata.git"
+  },
+  "keywords": [
+    "kata",
+    "refactor",
+    "gilded-rose"
+  ],
+  "license": "MIT",
+  "private": true,
+  "bugs": {
+    "url": "https://github.com/emilybache/GildedRose-Refactoring-Kata/issues"
+  },
+  "homepage": "https://github.com/emilybache/GildedRose-Refactoring-Kata",
+  "devDependencies": {
+    "jest": "^24.9.0"
+  }
+}

js-jest/src/gilded_rose.js

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+class Item {
+  constructor(name, sellIn, quality){
+    this.name = name;
+    this.sellIn = sellIn;
+    this.quality = quality;
+  }
+}
+
+class Shop {
+  constructor(items=[]){
+    this.items = items;
+  }
+  updateQuality() {
+    for (let i = 0; i < this.items.length; i++) {
+      if (this.items[i].name != 'Aged Brie' && this.items[i].name != 'Backstage passes to a TAFKAL80ETC concert') {
+        if (this.items[i].quality > 0) {
+          if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
+            this.items[i].quality = this.items[i].quality - 1;
+          }
+        }
+      } else {
+        if (this.items[i].quality < 50) {
+          this.items[i].quality = this.items[i].quality + 1;
+          if (this.items[i].name == 'Backstage passes to a TAFKAL80ETC concert') {
+            if (this.items[i].sellIn < 11) {
+              if (this.items[i].quality < 50) {
+                this.items[i].quality = this.items[i].quality + 1;
+              }
+            }
+            if (this.items[i].sellIn < 6) {
+              if (this.items[i].quality < 50) {
+                this.items[i].quality = this.items[i].quality + 1;
+              }
+            }
+          }
+        }
+      }
+      if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
+        this.items[i].sellIn = this.items[i].sellIn - 1;
+      }
+      if (this.items[i].sellIn < 0) {
+        if (this.items[i].name != 'Aged Brie') {
+          if (this.items[i].name != 'Backstage passes to a TAFKAL80ETC concert') {
+            if (this.items[i].quality > 0) {
+              if (this.items[i].name != 'Sulfuras, Hand of Ragnaros') {
+                this.items[i].quality = this.items[i].quality - 1;
+              }
+            }
+          } else {
+            this.items[i].quality = this.items[i].quality - this.items[i].quality;
+          }
+        } else {
+          if (this.items[i].quality < 50) {
+            this.items[i].quality = this.items[i].quality + 1;
+          }
+        }
+      }
+    }
+
+    return this.items;
+  }
+}
+
+module.exports = {
+  Item,
+  Shop
+}

js-jest/test/gilded_rose.test.js

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+const {Shop, Item} = require("../src/gilded_rose");
+
+describe("Gilded Rose", function() {
+  it("should foo", function() {
+    const gildedRose = new Shop([new Item("foo", 0, 0)]);
+    const items = gildedRose.updateQuality();
+    expect(items[0].name).toBe("fixme");
+  });
+});