Add test for result matching

tests/tests.rs

@@ -490,6 +490,21 @@ fn error_patterns() {
     }
 }
 
+#[test]
+fn result_match() {
+    error_chain! { }
+
+    fn ok() -> Result<()> {
+        Ok(())
+    }
+
+    match ok() {
+        Ok(()) => {},
+        Err(Error(ErrorKind::Msg(_), _)) => {},
+        Err(..) => {},
+    }
+}
+
 #[test]
 fn error_first() {
     error_chain! {