Add a test for null getDBFHeader

Signed-off-by: William Desportes <[email protected]>

Author: williamdes

tests/ShapeFileTest.php

@@ -124,6 +124,15 @@ public function testLoadEmptyFilename(): void
         $this->assertEquals('Not a SHP file (file code mismatch)', $shp->lastError);
     }
 
+    /**
+     * Test to call getDBFHeader on a non loaded file
+     */
+    public function testGetDBFHeader(): void
+    {
+        $shp = new ShapeFile(1);
+        $this->assertNull($shp->getDBFHeader());
+    }
+
     /**
      * Data provider for file loading error tests.
      *