Updated Payment APIs

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

lib/PayPal/Api/InstallmentOption.php

@@ -0,0 +1,118 @@
+<?php
+
+namespace PayPal\Api;
+
+use PayPal\Common\PayPalModel;
+use PayPal\Converter\FormatConverter;
+use PayPal\Validation\NumericValidator;
+
+/**
+ * Class InstallmentOption
+ *
+ *  A resource describing an installment
+ *
+ * @package PayPal\Api
+ *
+ * @property int term
+ * @property \PayPal\Api\Currency monthly_payment
+ * @property \PayPal\Api\Currency discount_amount
+ * @property string discount_percentage
+ */
+class InstallmentOption extends PayPalModel
+{
+    /**
+     * Number of installments
+     *
+     * @param int $term
+     * 
+     * @return $this
+     */
+    public function setTerm($term)
+    {
+        $this->term = $term;
+        return $this;
+    }
+
+    /**
+     * Number of installments
+     *
+     * @return int
+     */
+    public function getTerm()
+    {
+        return $this->term;
+    }
+
+    /**
+     * Monthly payment
+     *
+     * @param \PayPal\Api\Currency $monthly_payment
+     * 
+     * @return $this
+     */
+    public function setMonthlyPayment($monthly_payment)
+    {
+        $this->monthly_payment = $monthly_payment;
+        return $this;
+    }
+
+    /**
+     * Monthly payment
+     *
+     * @return \PayPal\Api\Currency
+     */
+    public function getMonthlyPayment()
+    {
+        return $this->monthly_payment;
+    }
+
+    /**
+     * Discount amount applied to the payment, if any
+     *
+     * @param \PayPal\Api\Currency $discount_amount
+     * 
+     * @return $this
+     */
+    public function setDiscountAmount($discount_amount)
+    {
+        $this->discount_amount = $discount_amount;
+        return $this;
+    }
+
+    /**
+     * Discount amount applied to the payment, if any
+     *
+     * @return \PayPal\Api\Currency
+     */
+    public function getDiscountAmount()
+    {
+        return $this->discount_amount;
+    }
+
+    /**
+     * Discount percentage applied to the payment, if any
+     *
+     * @param string $discount_percentage
+     * 
+     * @return $this
+     */
+    public function setDiscountPercentage($discount_percentage)
+    {
+        NumericValidator::validate($discount_percentage, "Discount Percentage");
+        $discount_percentage = FormatConverter::formatToPrice($discount_percentage);
+        $this->discount_percentage = $discount_percentage;
+        return $this;
+    }
+
+    /**
+     * Discount percentage applied to the payment, if any
+     *
+     * @return string
+     */
+    public function getDiscountPercentage()
+    {
+        return $this->discount_percentage;
+    }
+
+
+}