tests: test for multiple flags in single

src/lib.rs

@@ -1228,5 +1228,18 @@ mod tests {
         assert!(m.is_present("color"));
     }
 
+    #[test]
+    fn multiple_flags_in_single() {
+        let m = App::new("multe_flags")
+            .args(vec![
+                Arg::from_usage("-f, --flag 'some flag'"),
+                Arg::from_usage("-c, --color 'some other flag'"),
+                Arg::from_usage("-d, --debug 'another other flag'")
+                ])
+            .get_matches_from(vec!["", "-fcd"]);
+        assert!(m.is_present("flag"));
+        assert!(m.is_present("color"));
+        assert!(m.is_present("debug"));
+    }
 
 }