Issue #2954413 by edysmp, quietone: Add getter for file

src/Plugin/migrate/source/CSV.php

@@ -171,6 +171,16 @@ class CSV extends SourcePluginBase implements ConfigurablePluginInterface {
     return $this->configuration;
   }
 
+  /**
+   * Gets the file object.
+   *
+   * @return \SplFileObject
+   *   The file object.
+   */
+  public function getFile() {
+    return $this->file;
+  }
+
   /**
    * {@inheritdoc}
    */

tests/src/Unit/Plugin/migrate/source/CSVUnitTest.php

@@ -256,6 +256,24 @@ class CSVUnitTest extends CSVUnitBase {
     $this->assertArrayEquals($expected, $csv->getIds());
   }
 
+  /**
+   * Test the getFile return a valid file instance.
+   *
+   * @covers ::getFile
+   */
+  public function testGetFile() {
+    $configuration = [
+      'path' => $this->happyPath,
+      'keys' => ['id'],
+      'header_row_count' => 1,
+    ];
+
+    $csv = new CSV($configuration, $this->pluginId, $this->pluginDefinition, $this->migration);
+    $csv->initializeIterator();
+    $file = $csv->getFile();
+    $this->assertInstanceOf(\SplFileObject::class, $file);
+  }
+
   /**
    * Tests that fields have a machine name and description.
    *