algorithm class: cone

Geometry/Cone.js

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+/**
+ * This class represents a circular cone and can calculate its volume and surface area
+ * https://en.wikipedia.org/wiki/Cone
+ * @constructor
+ * @param {number} baseRadius - The radius of the base of the cone.
+ * @param {number} height - The height of the cone
+ */
+export default class Cone {
+  constructor (baseRadius, height) {
+    this.baseRadius = baseRadius
+    this.height = height
+  }
+
+  baseArea = () => {
+    return Math.pow(this.baseRadius, 2) * Math.PI
+  }
+
+  volume = () => {
+    return this.baseArea() * this.height * 1 / 3
+  }
+
+  surfaceArea = () => {
+    return this.baseArea() + Math.PI * this.baseRadius * Math.sqrt(Math.pow(this.baseRadius, 2) + Math.pow(this.height, 2))
+  }
+}

Geometry/Test/Cone.test.js

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+import Cone from '../Cone'
+
+const cone = new Cone(3, 5)
+
+test('The Volume of a cone with base radius equal to 3 and height equal to 5', () => {
+  expect(parseFloat(cone.volume().toFixed(2))).toEqual(47.12)
+})
+
+test('The Surface Area of a cone with base radius equal to 3 and height equal to 5', () => {
+  expect(parseFloat(cone.surfaceArea().toFixed(2))).toEqual(83.23)
+})