My first commit of codes

vendor/nesbot/carbon/tests/IssetTest.php

@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of the Carbon package.
+ *
+ * (c) Brian Nesbitt <brian@nesbot.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Carbon\Carbon;
+
+class IssetTest extends TestFixture
+{
+    public function testIssetReturnFalseForUnknownProperty()
+    {
+        $this->assertFalse(isset(Carbon::create(1234, 5, 6, 7, 8, 9)->sdfsdfss));
+    }
+
+    public function testIssetReturnTrueForProperties()
+    {
+        $properties = array(
+            'year',
+            'month',
+            'day',
+            'hour',
+            'minute',
+            'second',
+            'dayOfWeek',
+            'dayOfYear',
+            'daysInMonth',
+            'timestamp',
+            'age',
+            'quarter',
+            'dst',
+            'offset',
+            'offsetHours',
+            'timezone',
+            'timezoneName',
+            'tz',
+            'tzName',
+        );
+
+        foreach ($properties as $property) {
+            $this->assertTrue(isset(Carbon::create(1234, 5, 6, 7, 8, 9)->$property));
+        }
+    }
+}