# always the same.
head -1 "${text_output1}" | "${BT_TESTS_GREP_BIN}" "^\[" >/dev/null
if test $? = 0; then
+ # shellcheck disable=SC2016
uniq_ts_cnt="$("${BT_TESTS_AWK_BIN}" '{ print $1 }' < "${text_output1}" | sort | uniq | wc -l)"
# Extract only the timestamp columns and compare the number of
# unique lines with the total number of lines to see if there