: eq
:
$* <<EOI >>EOO
cmd == 1
EOI
cmd == 1
EOO

: ne
:
$* <<EOI >>EOO
cmd!=1
EOI
cmd != 1
EOO

: end
:
$* <<EOI 2>>EOE != 0
cmd != 1 <"foo"
EOI
testscript:1:10: error: unexpected '<' after command exit status
EOE