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# follow-output gate: a shell pane in normal/insert mode holds its scrolled-up
# view while new pty output streams in (before: only the ACTIVE pane held);
# back in tty mode output follows to the bottom again. Pane A parks a
# background job blocked on file `go`, pane B triggers it and syncs on `done1`.
file s.txt x
start 31 100 -n 3
wait 8000 s.txt
stable 700 20000
key c-b
stable 600 8000
text (until test -f go; do sleep 0.05; done; seq 201 260; touch done1) &
key enter
stable 500 8000
text seq 1 200
key enter
wait 8000 199
stable 700 15000
key c-b
stable 600 8000
wheel up 10 8
wheel up 10 8
wheel up 10 8
stable 500 8000
snap held-pre
# focus pane B (right column), trigger A's job, sync on completion: A is now a
# NON-active normal-mode pane receiving output — its view must not move
press left 60 6
release left 60 6
stable 400 5000
key c-b
stable 600 8000
text touch go; until test -f done1; do sleep 0.05; done; echo SYN''CED
key enter
wait 8000 SYNCED
stable 700 15000
snap held-post
# back in A, re-enter tty: the echoed keystrokes pull the view to the bottom
press left 10 9
release left 10 9
stable 400 5000
key c-b
stable 600 8000
text seq 261 300
key enter
wait 8000 300
stable 700 15000
snap tty-follows
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