ex-02: implement airSpeedVelocity at AffricanSwallowDelegate

Author: kaiosilveira

src/example-02/birds/affrican-swallow/delegate/index.js

@@ -2,4 +2,8 @@ export class AffricanSwallowDelegate {
   constructor(data) {
     this._numberOfCoconuts = data.numberOfCoconuts;
   }
+
+  get airSpeedVelocity() {
+    return 40 - 2 * this._numberOfCoconuts;
+  }
 }

src/example-02/birds/affrican-swallow/delegate/index.test.js

@@ -0,0 +1,10 @@
+import { AffricanSwallowDelegate } from '.';
+
+describe('AffricanSwallowDelegate', () => {
+  describe('airSpeedVelocity', () => {
+    it('should have airSpeedVelocity 38 if number of coconuts is 1', () => {
+      const bird = new AffricanSwallowDelegate({ type: 'AffricanSwallow', numberOfCoconuts: 1 });
+      expect(bird.airSpeedVelocity).toBe(38);
+    });
+  });
+});