Hide _spinner --no-color output, waiting until <pid> exits.

nb

@@ -2955,23 +2955,27 @@ _spinner() {
   do
     local _temp="${_spin_string#?}"
 
-    printf " %s%s[%s%c%s]%s"    \
-      "${_TPUT_SGR0}"           \
-      "${_TPUT_SETAF_8}"        \
-      "${_TPUT_COLOR_PRIMARY}"  \
-      "${_spin_string}"         \
-      "${_TPUT_SETAF_8}"        \
-      "${_TPUT_SGR0}"
+    if ((_COLOR_ENABLED))
+    then
+      printf " %s%s[%s%c%s]%s"    \
+        "${_TPUT_SGR0}"           \
+        "${_TPUT_SETAF_8}"        \
+        "${_TPUT_COLOR_PRIMARY}"  \
+        "${_spin_string}"         \
+        "${_TPUT_SETAF_8}"        \
+        "${_TPUT_SGR0}"
+    fi
 
     sleep ${_delay}
 
     _spin_string="${_temp}${_spin_string%"${_temp}"}"
 
-    printf "\b\b\b\b\b\b\b\b"
-
+    ((_COLOR_ENABLED))  && printf         "\b\b\b\b\b\b\b\b"
   done
 
-  printf "        \b\b\b\b\b\b\b\b"
+  ((_COLOR_ENABLED))    && printf "        \b\b\b\b\b\b\b\b"
+
+  return 0
 }
 
 # _string_is_email()

test/helpers-spinner.bats

@@ -0,0 +1,35 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+@test "'_spinner()' displays color spinner for the duration of the specified process." {
+  {
+    (sleep 3) &
+  }
+
+  run "${_NB}" helpers spinner $!
+
+  printf "\${status}: '%s'\\n" "${status}"
+  printf "\${output}: '%s'\\n" "${output}"
+
+  [[    "${status}"     -eq 0                   ]]
+  [[    "${#lines[@]}"  -eq 1                   ]]
+  [[ !  "${lines[0]}"   =~  \[\|\]              ]]
+  [[    "${lines[0]}"   =~  \[.*\|.*\]          ]]
+  [[    "${lines[0]}"   =~  \
+.*\[.*\-.*\].*\ .*\[.*\/.*\].*\ .*\[.*\|.*\].*  ]]
+}
+
+@test "'_spinner() --no-color' displays nothing and waits for the duration of the specified process." {
+  {
+    (sleep 3) &
+  }
+
+  run "${_NB}" helpers spinner $! --no-color
+
+  printf "\${status}: '%s'\\n" "${status}"
+  printf "\${output}: '%s'\\n" "${output}"
+
+  [[    "${status}"     -eq 0                   ]]
+  [[ -z "${output}"                             ]]
+}