Added CartCollection, CashDraft, and CreditDraft class

app/Cart/CartCollection.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace App\Cart;
+
+use Illuminate\Support\Collection;
+
+/**
+* Cart Collection Class
+*/
+class CartCollection
+{
+    private $instance;
+    private $session;
+
+    public function __construct()
+    {
+        $this->session = session();
+        $this->instance('drafts');
+    }
+
+    public function instance($instance = null)
+    {
+        $instance = $instance ?: 'drafts';
+
+        $this->instance = sprintf('%s.%s', 'transactions', $instance);
+
+        return $this;
+    }
+
+    public function currentInstance()
+    {
+        return str_replace('transactions.', '', $this->instance);
+    }
+
+    public function add(TransactionDraft $draft)
+    {
+        $content = $this->getContent();
+        $draft->draftKey = str_random(10);
+        $content->put($draft->draftKey, $draft);
+
+        $this->session->put($this->instance, $content);
+
+        return $draft;
+    }
+
+    public function content()
+    {
+        if (is_null($this->session->get($this->instance))) {
+            return collect([]);
+        }
+
+        return $this->session->get($this->instance);
+    }
+
+    protected function getContent()
+    {
+        $content = $this->session->has($this->instance) ? $this->session->get($this->instance) : collect([]);
+
+        return $content;
+    }
+
+    public function count()
+    {
+        return $this->getContent()->count();
+    }
+
+    public function isEmpty()
+    {
+        return $this->count() == 0;
+    }
+
+    public function hasContent()
+    {
+        return !$this->isEmpty();
+    }
+
+}

app/Cart/CashDraft.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Cart;
+
+/**
+* Cash Draft
+*/
+class CashDraft implements TransactionDraft
+{
+    public $draftKey;
+}

app/Cart/CreditDraft.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Cart;
+
+/**
+* Credit Draft
+*/
+class CreditDraft implements TransactionDraft
+{
+    public $draftKey;
+}

app/Cart/TransactionDraft.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace App\Cart;
+
+/**
+* Transaction Draft Interface
+*/
+interface TransactionDraft {}

tests/Unit/CartCollectionTest.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Tests\Unit;
+
+use App\Cart\CartCollection;
+use App\Cart\CashDraft;
+use App\Cart\CreditDraft;
+use Tests\TestCase;
+
+class CartCollectionTest extends TestCase
+{
+    /** @test */
+    public function it_has_a_default_instance()
+    {
+        $cart = new CartCollection;
+        $this->assertEquals('drafts', $cart->currentInstance());
+    }
+
+    /** @test */
+    public function it_can_have_multiple_instances()
+    {
+        $cart = new CartCollection;
+
+        $cashDraft = new CashDraft;
+        $creditDraft = new CreditDraft;
+
+        $cart->add($cashDraft);
+        $cart->add($creditDraft);
+
+        $cart->instance('wishlist')->add($cashDraft);
+        $cart->instance('wishlist')->add($creditDraft);
+
+        $this->assertCount(2, $cart->instance('drafts')->content());
+        $this->assertCount(2, $cart->instance('wishlist')->content());
+    }
+
+    /** @test */
+    public function cart_collection_consist_of_transacion_draft_class()
+    {
+        $cart = new CartCollection;
+        $cashDraft = new CashDraft;
+        $creditDraft = new CreditDraft;
+
+        $cart->add($cashDraft);
+        $cart->add($creditDraft);
+
+        $this->assertCount(2, $cart->content());
+        $this->assertTrue($cart->hasContent());
+    }
+}

tests/Unit/ExampleTest.php

@@ -1,20 +0,0 @@
-<?php
-
-namespace Tests\Unit;
-
-use Tests\TestCase;
-use Illuminate\Foundation\Testing\DatabaseMigrations;
-use Illuminate\Foundation\Testing\DatabaseTransactions;
-
-class ExampleTest extends TestCase
-{
-    /**
-     * A basic test example.
-     *
-     * @return void
-     */
-    public function testBasicTest()
-    {
-        $this->assertTrue(true);
-    }
-}