Update [string map] tests to get illustration of need for pure dict

restriction up to date with ordered dicts.

2 files changed, 5 insertions, 1 deletions

diff --git a/generic/tclCmdMZ.c b/generic/tclCmdMZ.c
index 885a0bc..5479971 100644
--- a/generic/tclCmdMZ.c
+++ b/generic/tclCmdMZ.c
@@ -1873,7 +1873,7 @@ StringMapCmd(
 
     /*
      * This test is tricky, but has to be that way or you get other strange
-     * inconsistencies (see test string-10.20 for illustration why!)
+     * inconsistencies (see test string-10.20.1 for illustration why!)
      */
 
     if (objv[objc-2]->typePtr == &tclDictType && objv[objc-2]->bytes == NULL){
diff --git a/tests/string.test b/tests/string.test
index 418bc61..5fdb510 100644
--- a/tests/string.test
+++ b/tests/string.test
@@ -901,6 +901,10 @@ test string-10.20 {string map, dictionaries don't alter map ordering} {
     set map {aa X a Y}
     list [string map [dict create aa X a Y] aaa] [string map $map aaa] [dict size $map] [string map $map aaa]
 } {XY XY 2 XY}
+test string-10.20.1 {string map, dictionaries don't alter map ordering} {
+    set map {a X b Y a Z}
+    list [string map [dict create a X b Y a Z] aaa] [string map $map aaa] [dict size $map] [string map $map aaa]
+} {ZZZ XXX 2 XXX}
 test string-10.21 {string map, ABR checks} {
     string map {longstring foob} long
 } long