FluidTYPO3\Flux\Backend\DynamicFlexForm::getFlexFormDS_postProcessDS PHP Method

    public function getFlexFormDS_postProcessDS(&$dataStructArray, $conf, &$row, $table, $fieldName)
    {
        if (empty($fieldName) === TRUE) {
            // Cast NULL if an empty but not-NULL field name was passed. This has significance to the Flux internals in
            // respect to which ConfigurationProvider(s) are returned.
            $fieldName = NULL;
        }
        if (!empty($fieldName) && !isset($row[$fieldName])) {
            // Patch required (possibly temporary). Due to changes in TYPO3 in the new FormEngine we must fetch the
            // database record at this point when the record is incomplete, which happens when attempting to render
            // IRRE records. The reason is that the controller that creates the HTML does not fetch the record any
            // more - and that the AJAX request contains only the UID. So, we fetch the record here to ensure it
            // contains the necessary fields. DOES NOT WORK FOR NEW RECORDS - SEE COMMENTS BELOW.
            $row = $this->recordService->getSingle($table, '*', $row['uid']);
        }
        $defaultDataSourceCacheIdentifier = $table . '_' . $fieldName . '_' . sha1(serialize($conf));
        if (!$row) {
            // In the case that the database record cannot be fetched we are dealing with a new or otherwise deleted
            // or unidentifiable record. This happens primarily when AJAX requests are made to render IRRE records
            // without the parent record having been saved first. To accommodate this case we have to be slightly
            // creative and store a "default" data source definition which is identified based on a checksum of the
            // configuration provided. Whenever we are then unable to fetch a record, we can at least attempt to
            // locate a default data source in previously cached content. NB: we enforce a VERY high cache lifetime
            // and continually refresh it every time it is possible to render a new DS that can serve as default.
            $dataStructArray = (array) $this->cache->get($defaultDataSourceCacheIdentifier);
        } else {
            if (FALSE === is_array($dataStructArray)) {
                $dataStructArray = array();
            }
            $providers = $this->configurationService->resolveConfigurationProviders($table, $fieldName, $row);
            foreach ($providers as $provider) {
                $provider->postProcessDataStructure($row, $dataStructArray, $conf);
            }
            if (empty($dataStructArray)) {
                $dataStructArray = array('ROOT' => array('el' => array()));
            }
            $evaluationParameters = array();
            $this->cache->set($defaultDataSourceCacheIdentifier, $this->recursivelyEvaluateClosures($dataStructArray, $evaluationParameters), array(), time() + 31536000);
        }
        // Trigger TCEforms dimension patching only if required by TYPO3 version according to CompatibilityRegistry.
        if (CompatibilityRegistry::get('FluidTYPO3\\Flux\\Backend\\DynamicFlexForm::NEEDS_TCEFORMS_WRAPPER')) {
            $dataStructArray = $this->patchTceformsWrapper($dataStructArray);
        }
    }

 /**
  * @param string $fieldName
  * @param string $table
  * @return void
  */
 protected function canExecuteDataStructurePostProcessHookInternal($fieldName = 'pi_flexform', $table = 'tt_content')
 {
     $dataStructure = array();
     $config = array();
     $row = array();
     $instance = new DynamicFlexForm();
     $provider1 = $this->getMock('FluidTYPO3\\Flux\\Provider\\Provider', array('postProcessDataStructure'));
     $provider2 = $this->getMock('FluidTYPO3\\Flux\\Provider\\Provider', array('postProcessDataStructure'));
     $provider1->expects($this->once())->method('postProcessDataStructure');
     $provider2->expects($this->once())->method('postProcessDataStructure');
     $providers = array($provider1, $provider2);
     $service = $this->getMock('FluidTYPO3\\Flux\\Service\\FluxService', array('resolveConfigurationProviders'));
     $service->expects($this->once())->method('resolveConfigurationProviders')->with($table, $fieldName, $row)->willReturn($providers);
     $instance->injectConfigurationService($service);
     $instance->getFlexFormDS_postProcessDS($dataStructure, $config, $row, $table, $fieldName);
     $isArrayConstraint = new \PHPUnit_Framework_Constraint_IsType(\PHPUnit_Framework_Constraint_IsType::TYPE_ARRAY);
     $this->assertThat($dataStructure, $isArrayConstraint);
 }