Merge pull request #24 from opencafe/feature/fix-add-date

Fix jalali day of week return problem

Author: shahrokhniakan

src/Datium.php

@@ -434,6 +434,8 @@ public function add($value)
             new DateInterval($this->date_interval_expression)
         );
 
+        $this->gregorian_DayofWeek = $this->date_time->format('w');
+
         return $this;
 
     }

tests/DatiumTest.php

@@ -260,4 +260,12 @@ public function testJalaliSubDateTime()
 
         $this->assertEquals("Panjshanbe 9th Shahrivar 1396 12:00:00", $jalali);
     }
+
+    public function testJalaliAddDateTime()
+    {
+        $jalali = Datium::create(2017, 9, 1, 12, 0, 0)->add('1 day')->to('jalali')
+                        ->get('l jS F Y h:i:s');
+
+        $this->assertEquals("Shanbe 11th Shahrivar 1396 12:00:00", $jalali);
+    }
 }