Updated Invoicing APIs

- Updated Model objects.
- Updated Samples.
- Updated Tests.

tests/PayPal/Test/Api/TemplateSettingsTest.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace PayPal\Test\Api;
+
+use PayPal\Common\PayPalModel;
+use PayPal\Api\TemplateSettings;
+
+/**
+ * Class TemplateSettings
+ *
+ * @package PayPal\Test\Api
+ */
+class TemplateSettingsTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * Gets Json String of Object TemplateSettings
+     * @return string
+     */
+    public static function getJson()
+    {
+        return '{"field_name":"TestSample","display_preference":' .TemplateSettingsMetadataTest::getJson() . '}';
+    }
+
+    /**
+     * Gets Object Instance with Json data filled in
+     * @return TemplateSettings
+     */
+    public static function getObject()
+    {
+        return new TemplateSettings(self::getJson());
+    }
+
+
+    /**
+     * Tests for Serialization and Deserialization Issues
+     * @return TemplateSettings
+     */
+    public function testSerializationDeserialization()
+    {
+        $obj = new TemplateSettings(self::getJson());
+        $this->assertNotNull($obj);
+        $this->assertNotNull($obj->getFieldName());
+        $this->assertNotNull($obj->getDisplayPreference());
+        $this->assertEquals(self::getJson(), $obj->toJson());
+        return $obj;
+    }
+
+    /**
+     * @depends testSerializationDeserialization
+     * @param TemplateSettings $obj
+     */
+    public function testGetters($obj)
+    {
+        $this->assertEquals($obj->getFieldName(), "TestSample");
+        $this->assertEquals($obj->getDisplayPreference(), TemplateSettingsMetadataTest::getObject());
+    }
+
+
+}