Added test: Replace an existing, shortened symlink

Author: JaniruTEC

src/test/java/org/cryptomator/cryptofs/CryptoFileSystemProviderIntegrationTest.java

@@ -647,6 +647,50 @@ public void testReplaceExistingShortenedDirEmpty() throws IOException {
 			}
 		}*/
 
+		/* //TODO https://github.com/cryptomator/cryptofs/issues/177
+		@Test
+		@DisplayName("Replace an existing, shortened symlink")
+		public void testReplaceExistingShortenedSymlink() throws IOException {
+			try (var fs = setupCryptoFs(50, 100, false)) {
+				var source = fs.getPath("/sourceDir");
+				var linkedFromSource = fs.getPath("/linkedFromSource.txt");
+				var linkedFromSourceContent = "linkedFromSourceContent!";
+
+				var targetName50Chars = "/target_89_123456789_123456789_123456789_123456789_"; //since filename encryption increases filename length, 50 cleartext chars are sufficient
+				var target = fs.getPath(targetName50Chars);
+				var linkedFromTarget = fs.getPath("/linkedFromTarget.txt");
+				var linkedFromTargetContent = "linkedFromTargeContent!";
+
+				Files.createFile(linkedFromSource);
+				Files.writeString(linkedFromSource, linkedFromSourceContent, UTF_8);
+				Files.createFile(linkedFromTarget);
+				Files.writeString(linkedFromTarget, linkedFromTargetContent, UTF_8);
+
+				Files.createSymbolicLink(source, linkedFromSource);
+				Files.createSymbolicLink(target, linkedFromTarget);
+
+				Assertions.assertDoesNotThrow(() -> Files.move(source, target, REPLACE_EXISTING));
+				Assertions.assertTrue(Files.notExists(source));
+				Assertions.assertTrue(Files.exists(target));
+
+				//Assert linked files haven't been changed
+				Assertions.assertTrue(Files.exists(linkedFromSource));
+				Assertions.assertEquals(Files.readString(linkedFromSource, UTF_8), linkedFromSourceContent);
+				Assertions.assertFalse(Files.isSymbolicLink(linkedFromSource));
+				Assertions.assertTrue(Files.isRegularFile(linkedFromSource, LinkOption.NOFOLLOW_LINKS));
+
+				Assertions.assertTrue(Files.exists(linkedFromTarget));
+				Assertions.assertEquals(Files.readString(linkedFromTarget, UTF_8), linkedFromTargetContent);
+				Assertions.assertFalse(Files.isSymbolicLink(linkedFromTarget));
+				Assertions.assertTrue(Files.isRegularFile(linkedFromTarget, LinkOption.NOFOLLOW_LINKS));
+
+				//Assert link is correct
+				Assertions.assertTrue(Files.isSymbolicLink(target));
+				Assertions.assertTrue(Files.isRegularFile(target /* FOLLOW_LINKS *<remove this when enabling test>/));
+				Assertions.assertEquals(Files.readSymbolicLink(target), linkedFromSource);
+			}
+		}*/
+
 		private FileSystem setupCryptoFs(int ciphertextShorteningThreshold, int maxCleartextFilename, boolean readonly) throws IOException {
 			byte[] key = new byte[64];
 			Arrays.fill(key, (byte) 0x55);