tests: adds tests for AppSettings FromStr

src/app/settings.rs

@@ -2,6 +2,7 @@ use std::str::FromStr;
 use std::ascii::AsciiExt;
 
 /// Application level settings, which affect how `App` operates
+#[derive(PartialEq, Debug)]
 pub enum AppSettings {
     /// Allows subcommands to override all requirements of the parent (this command). For example
     /// if you had a subcommand or even top level application which had a required arguments that

tests/app_settings.rs

@@ -12,4 +12,17 @@ fn sub_command_negate_requred() {
         .subcommand(SubCommand::with_name("sub1"))
         .subcommand(SubCommand::with_name("sub1"))
         .get_matches_from(vec!["", "sub1"]);
+}
+
+#[test]
+fn app_settings_fromstr() {
+    assert_eq!("subcommandsnegatereqs".parse::<AppSettings>().ok().unwrap(), AppSettings::SubcommandsNegateReqs);
+    assert_eq!("subcommandsrequired".parse::<AppSettings>().ok().unwrap(), AppSettings::SubcommandRequired);
+    assert_eq!("argrequiredelsehelp".parse::<AppSettings>().ok().unwrap(), AppSettings::ArgRequiredElseHelp);
+    assert_eq!("globalversion".parse::<AppSettings>().ok().unwrap(), AppSettings::GlobalVersion);
+    assert_eq!("versionlesssubcommands".parse::<AppSettings>().ok().unwrap(), AppSettings::VersionlessSubcommands);
+    assert_eq!("unifiedhelpmessage".parse::<AppSettings>().ok().unwrap(), AppSettings::UnifiedHelpMessage);
+    assert_eq!("waitonerror".parse::<AppSettings>().ok().unwrap(), AppSettings::WaitOnError);
+    assert_eq!("subcommandrequiredelsehelp".parse::<AppSettings>().ok().unwrap(), AppSettings::SubcommandRequiredElseHelp);
+    assert!("hahahaha".parse::<AppSettings>().is_err());
 }