1 files changed, 148 insertions, 0 deletions
diff --git a/clap/tests/propagate_globals.rs b/clap/tests/propagate_globals.rs
new file mode 100644
index 0000000..ee77ce0
--- /dev/null
+++ b/clap/tests/propagate_globals.rs
@@ -0,0 +1,148 @@
+extern crate clap;
+extern crate regex;
+
+#[cfg(test)]
+mod tests {
+    include!("../clap-test.rs");
+    use clap::{App, Arg, SubCommand, ArgMatches};
+
+    fn get_app() -> App<'static, 'static> {
+        App::new("myprog")
+            .arg(Arg::with_name("GLOBAL_ARG")
+                .long("global-arg")
+                .help(
+                    "Specifies something needed by the subcommands",
+                )
+                .global(true)
+                .takes_value(true)
+                .default_value("default_value"))
+            .arg(Arg::with_name("GLOBAL_FLAG")
+                .long("global-flag")
+                .help(
+                    "Specifies something needed by the subcommands",
+                )
+                .multiple(true)
+                .global(true))
+            .subcommand(SubCommand::with_name("outer")
+                .subcommand(SubCommand::with_name("inner")))
+    }
+
+    fn get_matches(app: App<'static, 'static>, argv: &'static str) -> ArgMatches<'static> {
+        app.get_matches_from(argv.split(' ').collect::<Vec<_>>())
+    }
+
+    fn get_outer_matches<'a>(m: &'a ArgMatches<'static>) -> &'a ArgMatches<'static> {
+        m.subcommand_matches("outer").expect("could not access outer subcommand")
+    }
+
+    fn get_inner_matches<'a>(m: &'a ArgMatches<'static>) -> &'a ArgMatches<'static> {
+        get_outer_matches(m).subcommand_matches("inner").expect("could not access inner subcommand")
+    }
+
+    fn top_can_access_arg<T: Into<Option<&'static str>>>(m: &ArgMatches<'static>, val: T) -> bool {
+        m.value_of("GLOBAL_ARG") == val.into()
+    }
+
+    fn inner_can_access_arg<T: Into<Option<&'static str>>>(m: &ArgMatches<'static>, val: T) -> bool {
+        get_inner_matches(m).value_of("GLOBAL_ARG") == val.into()
+    }
+
+    fn outer_can_access_arg<T: Into<Option<&'static str>>>(m: &ArgMatches<'static>, val: T) -> bool {
+        get_outer_matches(m).value_of("GLOBAL_ARG") == val.into()
+    }
+
+    fn top_can_access_flag(m: &ArgMatches<'static>, present: bool, occurrences: u64) -> bool {
+        (m.is_present("GLOBAL_FLAG") == present) && (m.occurrences_of("GLOBAL_FLAG") == occurrences)
+    }
+
+    fn inner_can_access_flag(m: &ArgMatches<'static>, present: bool, occurrences: u64) -> bool {
+        let m = get_inner_matches(m);
+        (m.is_present("GLOBAL_FLAG") == present) && (m.occurrences_of("GLOBAL_FLAG") == occurrences)
+    }
+
+    fn outer_can_access_flag(m: &ArgMatches<'static>, present: bool, occurrences: u64) -> bool {
+        let m = get_outer_matches(m);
+        (m.is_present("GLOBAL_FLAG") == present) && (m.occurrences_of("GLOBAL_FLAG") == occurrences)
+    }
+
+    #[test]
+    fn global_arg_used_top_level() {
+        let m = get_matches(get_app(), "myprog --global-arg=some_value outer inner");
+
+        assert!(top_can_access_arg(&m, "some_value"));
+        assert!(inner_can_access_arg(&m, "some_value"));
+        assert!(outer_can_access_arg(&m, "some_value"));
+    }
+
+    #[test]
+    fn global_arg_used_outer() {
+        let m = get_matches(get_app(), "myprog outer --global-arg=some_value inner");
+
+        assert!(top_can_access_arg(&m, "some_value"));
+        assert!(inner_can_access_arg(&m, "some_value"));
+        assert!(outer_can_access_arg(&m, "some_value"));
+    }
+
+    #[test]
+    fn global_arg_used_inner() {
+        let m = get_matches(get_app(), "myprog outer inner --global-arg=some_value");
+
+        assert!(top_can_access_arg(&m, "some_value"));
+        assert!(inner_can_access_arg(&m, "some_value"));
+        assert!(outer_can_access_arg(&m, "some_value"));
+    }
+
+    #[test]
+    fn global_arg_default_value() {
+        let m = get_matches(get_app(), "myprog outer inner");
+
+        assert!(top_can_access_arg(&m, "default_value"));
+        assert!(inner_can_access_arg(&m, "default_value"));
+        assert!(outer_can_access_arg(&m, "default_value"));
+    }
+
+    #[test]
+    fn global_flag_used_top_level() {
+        let m = get_matches(get_app(), "myprog --global-flag outer inner");
+
+        assert!(top_can_access_flag(&m, true, 1));
+        assert!(inner_can_access_flag(&m, true, 1));
+        assert!(outer_can_access_flag(&m, true, 1));
+    }
+
+    #[test]
+    fn global_flag_used_outer() {
+        let m = get_matches(get_app(), "myprog outer --global-flag inner");
+
+        assert!(top_can_access_flag(&m, true, 1));
+        assert!(inner_can_access_flag(&m, true, 1));
+        assert!(outer_can_access_flag(&m, true, 1));
+    }
+
+    #[test]
+    fn global_flag_used_inner() {
+        let m = get_matches(get_app(), "myprog outer inner --global-flag");
+
+        assert!(top_can_access_flag(&m, true, 1));
+        assert!(inner_can_access_flag(&m, true, 1));
+        assert!(outer_can_access_flag(&m, true, 1));
+    }
+    
+    #[test]
+    fn global_flag_2x_used_top_level() {
+        let m = get_matches(get_app(), "myprog --global-flag --global-flag outer inner");
+
+        assert!(top_can_access_flag(&m, true, 2));
+        assert!(inner_can_access_flag(&m, true, 2));
+        assert!(outer_can_access_flag(&m, true, 2));
+    }
+
+    #[test]
+    fn global_flag_2x_used_inner() {
+        let m = get_matches(get_app(), "myprog outer inner --global-flag --global-flag");
+
+        assert!(top_can_access_flag(&m, true, 2));
+        assert!(inner_can_access_flag(&m, true, 2));
+        assert!(outer_can_access_flag(&m, true, 2));
+    }
+}