tests: adds tests for colored output

src/fmt.rs

@@ -48,3 +48,19 @@ impl<T: fmt::Display> fmt::Display for Format<T> {
         write!(f, "{}", &self.format())
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::Format;
+    use ansi_term::Colour::{Red, Green, Yellow};
+
+    #[test]
+    fn colored_output() {
+        let err = Format::Error("error");
+        assert_eq!(&*format!("{}", err), &*format!("{}", Red.bold().paint("error")));
+        let good = Format::Good("good");
+        assert_eq!(&*format!("{}", good), &*format!("{}", Green.paint("good")));
+        let warn = Format::Warning("warn");
+        assert_eq!(&*format!("{}", warn), &*format!("{}", Yellow.paint("warn")));
+    }
+}

src/tests.rs

@@ -1,5 +1,6 @@
-use super::{App, Arg, SubCommand};
 use std::collections::HashSet;
+
+use super::{App, Arg, SubCommand};
 use std::vec::Vec;
 
 arg_enum!{
@@ -906,4 +907,6 @@ fn create_multiple_subcommands() {
                                         .arg(Arg::with_name("roster").short("r"))])
                 .arg(Arg::with_name("other").long("other"))
                 .get_matches();
-}
+}
+
+