Commit7256e53

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algorithm class: circle (#1252)

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	`1`	`+/**`
	`2`	`+ * This class represents a circle and can calculate it's perimeter and area`
	`3`	`+ * https://en.wikipedia.org/wiki/Circle`
	`4`	`+ *@constructor`
	`5`	`+ *@param {number} radius - The radius of the circule.`
	`6`	`+ */`
	`7`	`+exportdefaultclassCircle{`
	`8`	`+constructor(radius){`
	`9`	`+this.radius=radius`
	`10`	`+}`
	`11`	`+`
	`12`	`+perimeter=()=>{`
	`13`	`+returnthis.radius2Math.PI`
	`14`	`+}`
	`15`	`+`
	`16`	`+area=()=>{`
	`17`	`+returnMath.pow(this.radius,2)*Math.PI`
	`18`	`+}`
	`19`	`+}`

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	`1`	`+importCirclefrom'../Circle'`
	`2`	`+`
	`3`	`+constcircle=newCircle(3)`
	`4`	`+`
	`5`	`+test('The area of a circle with radius equal to 3',()=>{`
	`6`	`+expect(parseFloat(circle.area().toFixed(2))).toEqual(28.27)`
	`7`	`+})`
	`8`	`+`
	`9`	`+test('The perimeter of a circle with radius equal to 3',()=>{`
	`10`	`+expect(parseFloat(circle.perimeter().toFixed(2))).toEqual(18.85)`
	`11`	`+})`

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