Validation Package Testing

- Added More Unit Tests to Validation Classes
- Updated Logic accordingly

tests/PayPal/Test/Validation/JsonValidatorTest.php

@@ -0,0 +1,57 @@
+<?php
+namespace PayPal\Test\Validation;
+
+use PayPal\Validation\JsonValidator;
+
+class JsonValidatorTest extends \PHPUnit_Framework_TestCase
+{
+
+    public static function positiveProvider()
+    {
+        return array(
+            array(null),
+            array(''),
+            array("{}"),
+            array('{"json":"value", "bool":false, "int":1, "float": 0.123, "array": [{"json":"value", "bool":false, "int":1, "float": 0.123},{"json":"value", "bool":false, "int":1, "float": 0.123} ]}')
+        );
+    }
+
+    public static function invalidProvider()
+    {
+        return array(
+            array('{'),
+            array('}'),
+            array('     '),
+            array(array('1' => '23')),
+            array('{"json":"value, "bool":false, "int":1, "float": 0.123, "array": [{"json":"value, "bool":false, "int":1, "float": 0.123}"json":"value, "bool":false, "int":1, "float": 0.123} ]}')
+        );
+    }
+
+    /**
+     *
+     * @dataProvider positiveProvider
+     */
+    public function testValidate($input)
+    {
+        $this->assertTrue(JsonValidator::validate($input));
+    }
+
+    /**
+     *
+     * @dataProvider invalidProvider
+     * @expectedException \InvalidArgumentException
+     */
+    public function testInvalidJson($input)
+    {
+        JsonValidator::validate($input);
+    }
+
+    /**
+     *
+     * @dataProvider invalidProvider
+     */
+    public function testInvalidJsonSilent($input)
+    {
+        $this->assertFalse(JsonValidator::validate($input, true));
+    }
+}