implement fake it

Author: Alexoner03

exercises/tiered_pricing/solutions/aortiz_typescript/src/Subscription.ts

@@ -1,3 +1,7 @@
 export class Subscription {
   constructor(private units: number) {}
+
+  getTotalPrice() {
+    return 299;
+  }
 }

exercises/tiered_pricing/solutions/aortiz_typescript/tests/Subscription.test.ts

@@ -4,4 +4,10 @@ describe("Subscription", () => {
   it("can be instantiated without throwing errors", () => {
     expect(() => new Subscription(1)).not.toThrow(TypeError);
   });
+
+  it("can be calculate subscription price of 1 unit", () => {
+    const subscription = new Subscription(1);
+
+    expect(subscription.getTotalPrice()).toBe(299);
+  });
 });