Test if the source is able to pull content in requested language.
public function testRequestDataForSpecificLanguage() {
// Create an english node.
$account = $this
->createUser();
$type = $this
->drupalCreateContentType();
$field = FieldStorageConfig::loadByName('node', 'body');
$field
->setTranslatable(TRUE);
$field
->setCardinality(2);
$field
->save();
$node = Node::create(array(
'title' => $this
->randomMachineName(),
'uid' => $account
->id(),
'type' => $type
->id(),
'langcode' => 'cs',
));
$node = $node
->addTranslation('en');
$node
->get('title')
->appendItem(array(
'value' => $this
->randomMachineName(),
));
$value = array(
'value' => $this
->randomMachineName(),
'summary' => $this
->randomMachineName(),
'format' => 'text_plain',
);
$node
->get('body')
->appendItem($value);
$node
->get('body')
->appendItem($value);
$node
->save();
$job = tmgmt_job_create('en', 'de');
$job
->save();
$job_item = tmgmt_job_item_create('content', 'node', $node
->id(), array(
'tjid' => $job
->id(),
));
$job_item
->save();
$source_plugin = $this->container
->get('plugin.manager.tmgmt.source')
->createInstance('content');
$data = $source_plugin
->getData($job_item);
$this
->assertEquals($value['value'], $data['body'][0]['value']['#text']);
}