A file always has a parent (the directory that contains it).

sebastianbergmann · sebastianbergmann · commit 520d2409de20 · 2010-05-11T10:01:29.000+02:00
diff --git a/PHP/CodeCoverage/Report/HTML/Node/File.php b/PHP/CodeCoverage/Report/HTML/Node/File.php
@@ -146,7 +146,7 @@ class PHP_CodeCoverage_Report_HTML_Node_File extends PHP_CodeCoverage_Report_HTM
      * @param  boolean                           $highlight
      * @throws RuntimeException
      */
-    public function __construct($name, PHP_CodeCoverage_Report_HTML_Node $parent = NULL, array $executedLines, $yui = TRUE, $highlight = FALSE)
+    public function __construct($name, PHP_CodeCoverage_Report_HTML_Node $parent, array $executedLines, $yui = TRUE, $highlight = FALSE)
     {
         parent::__construct($name, $parent);
 

Original file line number	Diff line number	Diff line change
`@@ -146,7 +146,7 @@ class PHP_CodeCoverage_Report_HTML_Node_File extends PHP_CodeCoverage_Report_HTM`
`146`	`146`	`* @param boolean $highlight`
`147`	`147`	`* @throws RuntimeException`
`148`	`148`	`*/`
`149`		`- public function __construct($name, PHP_CodeCoverage_Report_HTML_Node $parent = NULL, array $executedLines, $yui = TRUE, $highlight = FALSE)`
	`149`	`+ public function __construct($name, PHP_CodeCoverage_Report_HTML_Node $parent, array $executedLines, $yui = TRUE, $highlight = FALSE)`
`150`	`150`	`{`
`151`	`151`	`parent::__construct($name, $parent);`
`152`	`152`