better logger format test

src/middlewares/logger.rs

@@ -286,7 +286,6 @@ impl<'a> fmt::Display for FormatDisplay<'a> {
 
 #[cfg(test)]
 mod tests {
-    extern crate env_logger;
     use Body;
     use super::*;
     use time;
@@ -295,7 +294,6 @@ mod tests {
 
     #[test]
     fn test_logger() {
-        let _ = env_logger::init();
         let logger = Logger::new("%% %{User-Agent}i %{X-Test}o %{HOME}e %D test");
 
         let mut headers = HeaderMap::new();
@@ -314,6 +312,15 @@ mod tests {
             Finished::Done => (),
             _ => panic!(),
         }
+        let entry_time = time::now();
+        let render = |fmt: &mut Formatter| {
+            for unit in logger.format.0.iter() {
+                unit.render(fmt, &req, &resp, entry_time)?;
+            }
+            Ok(())
+        };
+        let s = format!("{}", FormatDisplay(&render));
+        assert!(s.contains("ACTIX-WEB ttt"));
     }
 
     #[test]