From a63b7315d030b91228b7ae148a55fd3985a21376 Mon Sep 17 00:00:00 2001
From: Don Rowe <rowedonalde@gmail.com>
Date: Mon, 3 Oct 2016 21:18:29 -0700
Subject: [PATCH 1/2] Implement Display trait for CompressionMethod.

It's an alias to the Debug format, but we can't derive Display yet,
so we associate it explicitly.
---
 src/compression.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/compression.rs b/src/compression.rs
index 927fc9e1..4581bfbf 100644
--- a/src/compression.rs
+++ b/src/compression.rs
@@ -1,5 +1,7 @@
 //! Possible ZIP compression methods.
 
+use std::fmt;
+
 /// Compression methods for the contents of a ZIP file.
 #[derive(Copy, Clone, PartialEq, Debug)]
 pub enum CompressionMethod
@@ -39,6 +41,13 @@ impl CompressionMethod {
     }
 }
 
+impl fmt::Display for CompressionMethod {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        // Just duplicate what the Debug format looks like, i.e, the enum key:
+        write!(f, "{:?}", self)
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::CompressionMethod;

From 1075ebf5f4edc0e988d85030f1707250aee482d4 Mon Sep 17 00:00:00 2001
From: Don Rowe <rowedonalde@gmail.com>
Date: Mon, 3 Oct 2016 21:34:14 -0700
Subject: [PATCH 2/2] Add test for Display implementation for CompressionMethod

---
 src/compression.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/compression.rs b/src/compression.rs
index 4581bfbf..bd772413 100644
--- a/src/compression.rs
+++ b/src/compression.rs
@@ -85,4 +85,17 @@ mod test {
             check_match(method);
         }
     }
+
+    #[test]
+    fn to_display_fmt() {
+        fn check_match(method: CompressionMethod) {
+            let debug_str = format!("{:?}", method);
+            let display_str = format!("{}", method);
+            assert_eq!(debug_str, display_str);
+        }
+
+        for method in methods() {
+            check_match(method);
+        }
+    }
 }