Updated Payment APIs

- Updated SDK Models to latest Payment APIs
- Updated Unit Tests

tests/PayPal/Test/Api/InstallmentOptionTest.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace PayPal\Test\Api;
+
+use PayPal\Common\PayPalModel;
+use PayPal\Api\InstallmentOption;
+
+/**
+ * Class InstallmentOption
+ *
+ * @package PayPal\Test\Api
+ */
+class InstallmentOptionTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * Gets Json String of Object InstallmentOption
+     * @return string
+     */
+    public static function getJson()
+    {
+        return '{"term":123,"monthly_payment":' .CurrencyTest::getJson() . ',"discount_amount":' .CurrencyTest::getJson() . ',"discount_percentage":"12.34"}';
+    }
+
+    /**
+     * Gets Object Instance with Json data filled in
+     * @return InstallmentOption
+     */
+    public static function getObject()
+    {
+        return new InstallmentOption(self::getJson());
+    }
+
+
+    /**
+     * Tests for Serialization and Deserialization Issues
+     * @return InstallmentOption
+     */
+    public function testSerializationDeserialization()
+    {
+        $obj = new InstallmentOption(self::getJson());
+        $this->assertNotNull($obj);
+        $this->assertNotNull($obj->getTerm());
+        $this->assertNotNull($obj->getMonthlyPayment());
+        $this->assertNotNull($obj->getDiscountAmount());
+        $this->assertNotNull($obj->getDiscountPercentage());
+        $this->assertEquals(self::getJson(), $obj->toJson());
+        return $obj;
+    }
+
+    /**
+     * @depends testSerializationDeserialization
+     * @param InstallmentOption $obj
+     */
+    public function testGetters($obj)
+    {
+        $this->assertEquals($obj->getTerm(), 123);
+        $this->assertEquals($obj->getMonthlyPayment(), CurrencyTest::getObject());
+        $this->assertEquals($obj->getDiscountAmount(), CurrencyTest::getObject());
+        $this->assertEquals($obj->getDiscountPercentage(), "12.34");
+    }
+}