Sheet visibility - XLSX writer and reader

tests/Spout/Reader/XLSX/SheetTest.php

@@ -30,6 +30,17 @@ class SheetTest extends \PHPUnit_Framework_TestCase
         $this->assertTrue($sheets[1]->isActive());
     }
 
+    /**
+     * @return void
+     */
+    public function testReaderShouldReturnCorrectSheetVisibility()
+    {
+        $sheets = $this->openFileAndReturnSheets('two_sheets_one_hidden_one_not.xlsx');
+
+        $this->assertFalse($sheets[0]->isVisible());
+        $this->assertTrue($sheets[1]->isVisible());
+    }
+
     /**
      * @param string $fileName
      * @return Sheet[]