Code described at https://www.tegh.net/knowledge/testing-in-a-pipeline/

Dockerfile

FROM bash
COPY test*.sh ./

RUN bash test_scenario.sh

test_scenario.sh

set -e

function _clean() {
  rm -f file-?.txt
}

function _testsShouldPass() {
  echo -n "Test #$1: "
  if bash tests.sh; then
    echo "PASS"
  else
    echo "FAIL"
    _clean
    return 1
  fi
}

function _testsShouldFail() {
  echo -n "Test #$1: "
  if ! bash tests.sh; then
    echo "PASS"
  else
    echo "FAIL"
    _clean
    return 1
  fi
}

_clean

_testsShouldFail 1

touch file-a.txt

_testsShouldFail 2

touch file-b.txt

_testsShouldFail 3

touch file-c.txt

_testsShouldPass 4

rm file-a.txt

_testsShouldFail 5

touch file-a.txt
rm file-b.txt

_testsShouldFail 6

touch file-b.txt
rm file-c.txt

_testsShouldFail 7

_clean

tests.sh

set -e

test -f file-a.txt
test -f file-b.txt
test -f file-c.txt