tests: on true color cache thrashing

when new items are added to the cache and entries there are never reused

tests/tests.results

@@ -135,3 +135,4 @@ selection_box_scrolls_up.sh c0fc70e8d865236d66edc7ad13af4dbe
 selection_scrolls_down.sh c0fc70e8d865236d66edc7ad13af4dbe
 selection_box_scrolls_down.sh c0fc70e8d865236d66edc7ad13af4dbe
 esc_term_name_version.sh 4498d5f9f7d827bcd46774063510c712
+true_color_cache_thrashing.sh 34df56d44685b91eed2802167f48f3c4

tests/true_color_cache_thrashing.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# fill space with E
+printf '\033[69;1;1;25;80\044x'
+
+#set color
+printf '\033[46;31;3m'
+
+# move
+printf '\033[H'
+
+# 3 loops of 128 colors
+for i in $(seq 255); do
+   printf "\033[48;2;0;%s;%sm " "$i" "$i"
+done
+for i in $(seq 255); do
+   printf "\033[48;2;%s;0;%sm " "$i" "$i"
+done
+for i in $(seq 255); do
+   printf "\033[48;2;%s;%s;0m " "$i" "$i"
+done