[IO-845] test links to targets outside the source directory (#571)
* test links to targets outside the source directory
* final
diff --git a/src/test/java/org/apache/commons/io/FileUtilsTest.java b/src/test/java/org/apache/commons/io/FileUtilsTest.java
index f19ed32..173f7a3 100644
--- a/src/test/java/org/apache/commons/io/FileUtilsTest.java
+++ b/src/test/java/org/apache/commons/io/FileUtilsTest.java
@@ -751,6 +751,38 @@
}
/**
+ * Test what happens when copyDirectory copies a directory that contains a symlink
+ * to a file outside the copied directory.
+ */
+ @Test
+ public void testCopyDirectory_symLinkExternalFile() throws Exception {
+ // make a file
+ final File content = new File(tempDirFile, "hello.txt");
+ FileUtils.writeStringToFile(content, "HELLO WORLD", "UTF8");
+
+ // Make a directory
+ final File realDirectory = new File(tempDirFile, "real_directory");
+ realDirectory.mkdir();
+
+ // Make a symlink to the file
+ final Path linkPath = realDirectory.toPath().resolve("link_to_file");
+ Files.createSymbolicLink(linkPath, content.toPath());
+
+ // Now copy the directory
+ final File destination = new File(tempDirFile, "destination");
+ FileUtils.copyDirectory(realDirectory, destination);
+
+ // test that the copied directory contains a link to the original file
+ final File copiedLink = new File(destination, "link_to_file");
+ assertTrue(Files.isSymbolicLink(copiedLink.toPath()));
+ final String actual = FileUtils.readFileToString(copiedLink, "UTF8");
+ assertEquals("HELLO WORLD", actual);
+
+ final Path source = Files.readSymbolicLink(copiedLink.toPath());
+ assertEquals(content.toPath(), source);
+ }
+
+ /**
* See what happens when copyDirectory copies a directory that is a symlink
* to another directory containing non-symlinked files.
* This is a characterization test to explore current behavior, and arguably
