feat: cria classe responsavel pelo carrinho

upload/system/library/PagSeguro/src/Domains/Cart.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace ValdeirPsr\PagSeguro\Domains;
+
+class Cart
+{
+    /** @var CartItem[] */
+    private $items = [];
+
+    /**
+     * @param CartItem[] $values
+     */
+    public function __construct(array $values = [])
+    {
+        $this->setItems($values);
+    }
+
+    /**
+     * Define os items do carrinho
+     * 
+     * @param CartItem[] $values
+     * 
+     * @return self
+     */
+    public function setItems(array $values = []): self
+    {
+        $this->values = [];
+
+        foreach($values as $value) {
+            $this->addItem($value);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Adiciona um item ao carrinho
+     * 
+     * @param CartItem $value
+     * 
+     * @return self
+     */
+    public function addItem(CartItem $value): self
+    {
+        $this->items[] = $value;
+        return $this;
+    }
+
+    public function getItems(): array
+    {
+        return $this->items;
+    }
+}

upload/system/library/PagSeguro/tests/unit/Domains/CartTest.php

@@ -0,0 +1,52 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+use ValdeirPsr\PagSeguro\Domains\Cart;
+use ValdeirPsr\PagSeguro\Domains\CartItem;
+
+class CartTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function newInstance()
+    {
+        $instance = new Cart;
+        $this->assertInstanceOf(Cart::class, $instance);
+    }
+
+    /**
+     * @test
+     */
+    public function defineItemsWithValidArgumentsWithoutErrors()
+    {
+        $instance = new Cart([
+            new CartItem(),
+            new CartItem(),
+            new CartItem(),
+            new CartItem(),
+            new CartItem(),
+            new CartItem(),
+            new CartItem()
+        ]);
+
+        $this->assertContainsOnlyInstancesOf(CartItem::class, $instance->getItems());
+    }
+
+    /**
+     * @test
+     */
+    public function defineItemsWithInvalidArgumentsShouldGiveError()
+    {
+        $this->expectException(TypeError::class);
+        $instance = new Cart([
+            new CartItem(),
+            new CartItem(),
+            new CartItem(),
+            new CartItem(),
+            new CartItem(),
+            new Cart(),
+            new CartItem()
+        ]);
+    }
+}