moved log to dev-dep, removed env_logger

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "adaptive_backoff"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Billy Rhoades <me@brod.es>"]
 edition = "2018"
 license = "MIT"
@@ -15,8 +15,8 @@ keywords = ["adaptive", "backoff", "ratelimit", "throttle"]
 anyhow = "1.0"
 thiserror = "1.0"
 
+[dev-dependencies]
 log = "0.4"
-pretty_env_logger = "0.3"
 
 [lib]
 name = "adaptive_backoff"

src/lib/adaptive.rs

@@ -1,5 +1,6 @@
 use std::time::Duration;
 
+#[cfg(test)]
 use log::trace;
 
 use crate::{backoff::*, errors::*};
@@ -188,6 +189,7 @@ impl<B: Backoff> Adaptable for Adaptive<B> {
             None => self.delay = Duration::new(0, 0),
         }
 
+        #[cfg(test)]
         trace!(
             "success count now {} with delay @ {:?}",
             self.success_factor,
@@ -203,6 +205,7 @@ impl<B: Backoff> Adaptable for Adaptive<B> {
         let delta = self.backoff.wait().div_f64(self.fail_factor);
         self.delay += delta;
 
+        #[cfg(test)]
         trace!(
             "fail count now {}, delta {:?} added to delay, now @ {:?}",
             self.fail_factor,

src/lib/backoff.rs

@@ -92,7 +92,7 @@ fn test_exp_backoff() {
         .factor(2.0)
         .build();
 
-    assert!(backoff.is_ok(), backoff.err());
+    assert!(backoff.is_ok(), "{:?}", backoff.err());
     let mut backoff = backoff.unwrap();
 
     for i in 1..20 {