Added test

src/parser/mod.rs

@@ -166,3 +166,16 @@ impl NumberParser {
         parsed
     }
 }
+
+mod tests {
+    #[test]
+    fn test_file_dump() {
+        let filename = String::from("tests/numbers-0.txt");
+        let file_exists = {
+            let path = std::path::Path::new(filename.as_str());
+            path.exists()
+        };
+
+        assert_eq!(true, file_exists, "File does not exists {filename:?}");
+    }
+}