Islandora#139: Add tests for inputs which trigger warnings

Author: xurizaemon

tests/src/Kernel/EDTFFormatterTest.php

@@ -196,18 +196,18 @@ public function edtfDateFormatProvider(): array {
       ],
 
       // Invalid/edge cases
-//      'Empty input' => [
-//        'input' => '',
-//        'expected' => '',
-//      ],
-//      'Invalid date format' => [
-//        'input' => 'invalid-date',
-//        'expected' => '',
-//      ],
-//      'Invalid (date-like)' => [
-//        'original' => '1900s',
-//        'formatted' => '',
-//      ],
+      'Empty input' => [
+        'input' => '',
+        'expected' => '',
+      ],
+      'Invalid date format' => [
+        'input' => 'invalid-date',
+        'expected' => '',
+      ],
+      'Invalid (date-like)' => [
+        'original' => '1900s',
+        'formatted' => '',
+      ],
     ];
   }