Upstream myclabs/DeepCopy state of the touched files before 6d74592b9e

tests/DeepCopyTest/TypeFilter/Date/DateIntervalFilterTest.php

@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+
+namespace DeepCopyTest\TypeFilter\Date;
+
+use DateInterval;
+use DeepCopy\TypeFilter\Date\DateIntervalFilter;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers \DeepCopy\TypeFilter\Date\DateIntervalFilter
+ */
+class DateIntervalFilterTest extends TestCase
+{
+    public function test_it_deep_copies_a_DateInterval()
+    {
+        $object = new DateInterval('P2D');;
+
+        $filter = new DateIntervalFilter();
+
+        $copy = $filter->apply($object);
+
+        $this->assertEquals($object, $copy);
+        $this->assertNotSame($object, $copy);
+    }
+}