#!/bin/bash
cat > mission-log.txt <<'LOG'
[1969-07-20 13:32] Apollo touchdown confirmed.
[1969-07-20 13:33] Surface stable.
[1969-07-20 13:34] Cabin sealed.
[1969-07-20 13:35] EVA prep started.
[1969-07-20 13:40] Hatch open check.
[1969-07-20 13:42] Suit pressurization complete.
[1969-07-20 13:50] Ladder deployed.
[1969-07-20 13:55] First step recorded.
[1969-07-20 14:00] Sample collection begun.
[1969-07-20 14:10] All systems nominal.
[1969-07-20 14:20] Communication test passed.
[1969-07-20 14:30] Second sample box sealed.
[1969-07-20 14:40] Solar panel deployed.
[1969-07-20 14:50] Flag planted.
[1969-07-20 15:00] Phone call inbound.
[1969-07-20 15:10] Phone call complete.
[1969-07-20 15:20] Sample box stowed.
[1969-07-20 15:30] EVA wrap-up started.
[1969-07-20 15:35] Hatch closed.
[1969-07-20 15:40] Cabin re-pressurized.
LOG

bash solution.sh > /dev/null 2>&1

N=0
report() {
  N=$((N+1))
  if [ "$1" = "0" ]; then echo "ok $N - $2"; else echo "not ok $N - $2"; fi
}

[ -f first-five.txt ]; report $? "first-five.txt exists"
diff -q <(head -n 5 mission-log.txt) first-five.txt > /dev/null 2>&1; report $? "first-five.txt matches head -n 5"
[ -f last-three.txt ]; report $? "last-three.txt exists"
diff -q <(tail -n 3 mission-log.txt) last-three.txt > /dev/null 2>&1; report $? "last-three.txt matches tail -n 3"
[ -f line-count.txt ]; report $? "line-count.txt exists"
COUNT=$(awk '{print $1}' line-count.txt 2>/dev/null | tr -d ' ')
[ "$COUNT" = "20" ]; report $? "line-count.txt contains 20"