assertTermDoesNotExist example

    for ($i = 1; $i < 5; $i++) {
      $row = $id_map->getRowBySource(['tid' => $i]);
      $new_hash[$i] = $row['hash'];
    }
    $this->assertNotEquals($original_hash[1], $new_hash[1]);
    $this->assertEquals($original_hash[2], $new_hash[2]);
    $this->assertNotEquals($original_hash[3], $new_hash[3]);
    $this->assertEquals($original_hash[4], $new_hash[4]);

    // Item with name changes should be updated.     $this->assertTermExists('name', 'Item 1 updated');
    $this->assertTermDoesNotExist('name', 'Item 1');

    // Item without name changes should not be updated.     $this->assertTermExists('name', 'Item 2');

    // Item with field changes should be updated.     $this->assertTermExists('description', 'Text item 3 updated');
    $this->assertTermDoesNotExist('description', 'Text item 3');

    // Item without field changes should not be updated.     $this->assertTermExists('description', 'Text item 4');