gistfile1.txt

test do
  kubeon = ". #{opt_share}/kube-ps1.sh && echo $KUBE_PS1_SHELL"
  assert_equal "zsh", shell_output("zsh -c '#{kubeon}'").chomp
end

==> zsh -c '. /usr/local/opt/kube-ps1/share/kube-ps1.sh && echo $KUBE_PS1_SHELL'
/usr/local/opt/kube-ps1/share/kube-ps1.sh:27: character not in range
Error: kube-ps1: failed
An exception occurred within a child process:
  Test::Unit::AssertionFailedError: <0> expected but was
<126>.

Line 27 from code:
KUBE_PS1_SYMBOL_DEFAULT=${KUBE_PS1_SYMBOL_DEFAULT:-$'\u2388 '}