add extra test

Author: henryiii

include/CLI/App.hpp

@@ -1389,7 +1389,7 @@ class App {
         }
     }
 
-    /// Return True if a help flag detected (checks all parents)
+    /// Return True if a help flag detected (checks all parents) (only run if help called before subcommand)
     bool _any_help_flag() const {
         bool result = false;
         const Option *help_ptr = get_help_ptr();

tests/SubcommandTest.cpp

@@ -438,6 +438,8 @@ struct SubcommandProgram : public TApp {
     int count;
 
     SubcommandProgram() {
+        app.set_help_all_flag("--help-all");
+
         start = app.add_subcommand("start", "Start prog");
         stop = app.add_subcommand("stop", "Stop prog");
 
@@ -541,6 +543,18 @@ TEST_F(SubcommandProgram, HelpOrder) {
     EXPECT_THROW(run(), CLI::CallForHelp);
 }
 
+TEST_F(SubcommandProgram, HelpAllOrder) {
+
+    args = {"--help-all"};
+    EXPECT_THROW(run(), CLI::CallForAllHelp);
+
+    args = {"start", "--help-all"};
+    EXPECT_THROW(run(), CLI::CallForAllHelp);
+
+    args = {"--help-all", "start"};
+    EXPECT_THROW(run(), CLI::CallForAllHelp);
+}
+
 TEST_F(SubcommandProgram, Callbacks) {
 
     start->callback([]() { throw CLI::Success(); });