From 46640c5096d187cac8fe6ed29662c7e6f4d57aed Mon Sep 17 00:00:00 2001
From: Adam Wathan <adam.wathan@gmail.com>
Date: Tue, 8 Nov 2016 13:14:52 -0500
Subject: [PATCH] 2.4 - Faking the Payment Gateway

---
 app/Billing/FakePaymentGateway.php            | 28 +++++++++++++++++++
 app/Billing/PaymentGateway.php                |  8 ++++++
 app/Exceptions/Handler.php                    |  1 +
 .../Controllers/ConcertOrdersController.php   | 27 ++++++++++++++++++
 routes/web.php                                |  2 ++
 tests/features/PurchaseTicketsTest.php        | 10 +++++++
 tests/unit/Billing/FakePaymentGatewayTest.php | 19 +++++++++++++
 7 files changed, 95 insertions(+)
 create mode 100644 app/Billing/FakePaymentGateway.php
 create mode 100644 app/Billing/PaymentGateway.php
 create mode 100644 app/Http/Controllers/ConcertOrdersController.php
 create mode 100644 tests/unit/Billing/FakePaymentGatewayTest.php

diff --git a/app/Billing/FakePaymentGateway.php b/app/Billing/FakePaymentGateway.php
new file mode 100644
index 0000000..5d62847
--- /dev/null
+++ b/app/Billing/FakePaymentGateway.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Billing;
+
+class FakePaymentGateway implements PaymentGateway
+{
+    private $charges;
+
+    public function __construct()
+    {
+        $this->charges = collect();
+    }
+
+    public function getValidTestToken()
+    {
+        return "valid-token";
+    }
+
+    public function charge($amount, $token)
+    {
+        $this->charges[] = $amount;
+    }
+
+    public function totalCharges()
+    {
+        return $this->charges->sum();
+    }
+}
diff --git a/app/Billing/PaymentGateway.php b/app/Billing/PaymentGateway.php
new file mode 100644
index 0000000..21b1f5b
--- /dev/null
+++ b/app/Billing/PaymentGateway.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace App\Billing;
+
+interface PaymentGateway
+{
+    public function charge($amount, $token);
+}
diff --git a/app/Exceptions/Handler.php b/app/Exceptions/Handler.php
index 21c9784..ec696a5 100644
--- a/app/Exceptions/Handler.php
+++ b/app/Exceptions/Handler.php
@@ -44,6 +44,7 @@ class Handler extends ExceptionHandler
      */
     public function render($request, Exception $exception)
     {
+        throw $exception;
         return parent::render($request, $exception);
     }
 
diff --git a/app/Http/Controllers/ConcertOrdersController.php b/app/Http/Controllers/ConcertOrdersController.php
new file mode 100644
index 0000000..dfe4ae3
--- /dev/null
+++ b/app/Http/Controllers/ConcertOrdersController.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Concert;
+use Illuminate\Http\Request;
+use App\Billing\PaymentGateway;
+
+class ConcertOrdersController extends Controller
+{
+    private $paymentGateway;
+
+    public function __construct(PaymentGateway $paymentGateway)
+    {
+        $this->paymentGateway = $paymentGateway;
+    }
+
+    public function store($concertId)
+    {
+        $concert = Concert::find($concertId);
+        $ticketQuantity = request('ticket_quantity');
+        $amount = $ticketQuantity * $concert->ticket_price;
+        $token = request('payment_token');
+        $this->paymentGateway->charge($amount, $token);
+        return response()->json([], 201);
+    }
+}
diff --git a/routes/web.php b/routes/web.php
index c3ef6cb..af1ddbb 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -12,3 +12,5 @@
 */
 
 Route::get('/concerts/{id}', 'ConcertsController@show');
+
+Route::post('/concerts/{id}/orders', 'ConcertOrdersController@store');
diff --git a/tests/features/PurchaseTicketsTest.php b/tests/features/PurchaseTicketsTest.php
index ce53c79..6e6b170 100644
--- a/tests/features/PurchaseTicketsTest.php
+++ b/tests/features/PurchaseTicketsTest.php
@@ -1,14 +1,22 @@
 <?php
 
+use App\Concert;
+use App\Billing\PaymentGateway;
+use App\Billing\FakePaymentGateway;
 use Illuminate\Foundation\Testing\WithoutMiddleware;
 use Illuminate\Foundation\Testing\DatabaseMigrations;
 use Illuminate\Foundation\Testing\DatabaseTransactions;
 
 class PurchaseTicketsTest extends TestCase
 {
+    use DatabaseMigrations;
+
     /** @test */
     function customer_can_purchase_concert_tickets()
     {
+        $paymentGateway = new FakePaymentGateway;
+        $this->app->instance(PaymentGateway::class, $paymentGateway);
+
         // Arrange
         // Create a concert
         $concert = factory(Concert::class)->create(['ticket_price' => 3250]);
@@ -22,6 +30,8 @@ class PurchaseTicketsTest extends TestCase
         ]);
 
         // Assert
+        $this->assertResponseStatus(201);
+
         // Make sure the customer was charged the correct amount
         $this->assertEquals(9750, $paymentGateway->totalCharges());
 
diff --git a/tests/unit/Billing/FakePaymentGatewayTest.php b/tests/unit/Billing/FakePaymentGatewayTest.php
new file mode 100644
index 0000000..c1b0886
--- /dev/null
+++ b/tests/unit/Billing/FakePaymentGatewayTest.php
@@ -0,0 +1,19 @@
+<?php
+
+use App\Billing\FakePaymentGateway;
+use Illuminate\Foundation\Testing\WithoutMiddleware;
+use Illuminate\Foundation\Testing\DatabaseMigrations;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
+
+class FakePaymentGatewayTest extends TestCase
+{
+    /** @test */
+    function charges_with_a_valid_payment_token_are_successful()
+    {
+        $paymentGateway = new FakePaymentGateway;
+
+        $paymentGateway->charge(2500, $paymentGateway->getValidTestToken());
+
+        $this->assertEquals(2500, $paymentGateway->totalCharges());
+    }
+}