Fix tests

Author: Maks3w

src/CodeCoverage.php

@@ -355,7 +355,7 @@ public function merge(PHP_CodeCoverage $that)
         foreach ($that->getData() as $file => $fileData) {
             if (!isset($this->data[$file])) {
                 if (!$that->filter()->isFiltered($file)) {
-                    $this->data[$file] = ['lines' => $fileData['lines']];
+                    $this->data[$file] = $fileData;
                 }
 
                 continue;
@@ -638,7 +638,10 @@ private function addUncoveredFilesFromWhitelist()
                     $uncoveredFiles
                 );
             } else {
-                $data[$uncoveredFile] = ['lines' => []];
+                $data[$uncoveredFile] = [
+                    'lines' => [],
+                    'functions' => [],
+                ];
 
                 $lines = count(file($uncoveredFile));
 
@@ -671,7 +674,7 @@ private function processUncoveredFileFromWhitelist($uncoveredFile, array &$data,
                     }
                 }
 
-                $data[$file] = ['lines' => $fileCoverage];
+                $data[$file] = $fileCoverage;
             }
         }
     }

src/CodeCoverage/Driver/Xdebug.php

@@ -78,6 +78,9 @@ private function cleanup(array $data)
             if (!isset($data[$file]['lines'])) {
                 $data[$file] = ['lines' => $data[$file]];
             }
+            if (!isset($data[$file]['functions'])) {
+                $data[$file]['functions'] = [];
+            }
 
             unset($data[$file]['lines'][0]);