test for path_entry_reorder added

Signed-off-by: Achim Gsell <achim.gsell@psi.ch>

Author: gsell

testsuite/modulefiles/append/9.0

@@ -0,0 +1,24 @@
+#%Module1.0
+
+##############################################################################
+#   Modules Revision 3.0
+#   Providing a flexible user environment
+#
+#   File:		append/%M%
+#   Revision:		%I%
+#   First Edition:	2026/01/08
+#   Last Mod.:		%U%, %G%
+#
+#   Authors:		Achim Gsell, achim.gsell@psi.ch
+#
+#   Description:	Test appending paths with path_entry_enabled
+#   Command:
+#   Sub-Command:	append-path
+#
+#   Invocation:		load @M@/@V@
+#   Comment:	%C{
+#		}C%
+#
+##############################################################################
+
+append-path FOO /test/dir1 /test/dir2 /test/dir3

testsuite/modules.50-cmds/040-append.exp

@@ -485,6 +485,26 @@ lappend ans [list unset LOADEDMODULES]
 testouterr_cmd "sh" "unload $module" $ans {}
 
 
+#
+# test that path entry is not removed if added twice and path_entry_reorder
+# is true
+#
+set module "append/9.0"
+set modulefile "$modpath/$module"
+
+setenv_var MODULES_PATH_ENTRY_REORDER 1
+setenv_var FOO /test/dir2
+unsetenv_var __MODULES_SHARE_FOO
+
+unsetenv_loaded_module
+set ans [list]
+lappend ans [list set __MODULES_SHARE_FOO "/test/dir2:2"]
+lappend ans [list set FOO "/test/dir1:/test/dir2:/test/dir3"]
+lappend ans [list set _LMFILES_ $modulefile]
+lappend ans [list set LOADEDMODULES $module]
+
+testouterr_cmd "sh" "load $module" $ans ""
+
 #
 # --glob option
 #