test: introduce env variable mocking (#1490)

src/lib.rs

@@ -1,6 +1,3 @@
-#[macro_use]
-extern crate pest_derive;
-
 // Lib is present to allow for benchmarking
 pub mod config;
 pub mod configs;
@@ -11,3 +8,6 @@ pub mod modules;
 pub mod print;
 pub mod segment;
 mod utils;
+
+#[cfg(test)]
+mod test;