Update.

test/tempfile/temporary_directory_use.wren

@@ -0,0 +1,20 @@
+// retoor <retoor@molodetz.nl>
+
+import "tempfile" for TemporaryDirectory
+import "io" for File, FileFlags
+import "pathlib" for Path
+
+var savedName = null
+
+TemporaryDirectory.new().use {|tmp|
+    savedName = tmp.name
+    System.print(Path.new(savedName).isDir()) // expect: true
+
+    var filePath = savedName + "/test.txt"
+    File.create(filePath) {|f|
+        f.writeBytes("hello", 0)
+    }
+    System.print(Path.new(filePath).exists()) // expect: true
+}
+
+System.print(Path.new(savedName).exists()) // expect: false