Added a test

app/code/community/Mollie/Mpm/Test/Model/Client/OrdersTest.php

@@ -0,0 +1,27 @@
+<?php
+
+class Mollie_Mpm_Test_Model_Client_OrdersTest extends Mollie_Mpm_Test_TestHelpers_TestCase
+{
+    public function testUsesTheCorrectApiToResumeTheTransaction()
+    {
+        $apiMock = $this->createMock('\Mollie\Api\MollieApiClient');
+        $ordersApiMock = $this->createMock('\Mollie\Api\Endpoints\OrderEndpoint');
+        $apiMock->orders = $ordersApiMock;
+
+        // Make sure the right API is called.
+        $ordersApiMock->expects($this->once())->method('get')->willReturn(new \Mollie\Api\Resources\Order($apiMock));
+
+        $mollieHelperMock = $this->getHelper('mpm');
+        $mollieHelperMock->method('getMollieAPI')->willReturn($apiMock);
+
+        $order = $this->getMockBuilder('Mage_Sales_Model_Order')
+            ->setMethods(['getMollieTransactionId', 'getPayment'])
+            ->getMock();
+
+        $order->method('getMollieTransactionId')->willReturn(123);
+        $order->method('getPayment')->willReturn(new Mage_Sales_Model_Order_Payment);
+
+        $instance = new Mollie_Mpm_Model_Client_Orders();
+        $instance->startTransaction($order);
+    }
+}