ExportInterface::getLabels should return a closure

Export/Formatter/CSVFormatter.php

@@ -315,18 +315,13 @@ class CSVFormatter implements FormatterInterface
         foreach ($results as $row) {
             $line = array();
             foreach ($headers as $key) {
-                if (!array_key_exists($row[$key], $labels[$key])) {
-                    throw new \LogicException("The value '".$row[$key]."' "
-                            . "is not available from the labels defined by aggregator or report. "
-                            . "The key provided by aggregator or report is '$key'");
-                }
                 
-                $line[] = $labels[$key][$row[$key]];
+                $line[] = call_user_func($labels[$key], $row[$key]);
             }
             
             //append result
             foreach ($resultsKeys as $key) {
-                $line[] = $labels[$key][$row[$key]];
+                $line[] = call_user_func($labels[$key], $row[$key]);
             }
             
             $r[] = $line;

Tests/Export/ExportManagerTest.php

@@ -574,7 +574,15 @@ class ExportManagerTest extends KernelTestCase
                     Argument::is(array(0, 1)), 
                     Argument::Type('array')
                 )
-                ->willReturn(array( 1 => 1, 0 => 0));
+                ->willReturn(function($value) { 
+                    switch($value) {
+                        case 0: 
+                        case 1:
+                            return $value;
+                        default: throw new \RuntimeException(sprintf("The value %s is not valid", $value));
+                    }
+                });
+                
         $export->getQueryKeys(Argument::Type('array'))->willReturn(array('export'));
         $export->getTitle()->willReturn('dummy title');
         $exportManager->addExport($export->reveal(), 'dummy');
@@ -602,9 +610,14 @@ class ExportManagerTest extends KernelTestCase
                     Argument::is(array('cat a', 'cat b')), 
                     Argument::is(array())
                 )
-                ->willReturn(array(
+                ->willReturn(function($value) {
-                'cat a' => 'label cat a', 'cat b' => 'label cat b'
+                    switch ($value) {
-            ));
+                        case 'cat a' : return 'label cat a';
+                        case 'cat b' : return 'label cat b';
+                        default:
+                            throw new \RuntimeException(sprintf("This value (%s) is not valid", $value));
+                    }
+                });
         $aggregator->addRole()->willReturn(null);
         //$aggregator->addRole()->shouldBeCalled();
         $exportManager->addAggregator($aggregator->reveal(), 'aggregator_foo');