added a test case for File.relativePath() along with fixing a bug if you pass the same file as the argument; it should have returned the empty string

2012-10-09 08:36:51 +01:00
parent 4b5da9dc17
commit 6a59820de3
2 changed files with 21 additions and 8 deletions
@@ -73,7 +73,10 @@ public fun File.relativePath(descendant: File): String {
    val prefix = this.directory.canonicalPath
    val answer = descendant.canonicalPath
    return if (answer.startsWith(prefix)) {
-        answer.substring(prefix.size + 1)
+        val prefixSize = prefix.size
+        if (answer.size > prefixSize) {
+            answer.substring(prefixSize + 1)
+        } else ""
    } else {
        answer
    }