_testPassCount=0;
_testTotalCount=0;

function it() {
  local exitCode=$?;
  local message=$1;
  local status;

  _testTotalCount=$((_testTotalCount+1));

  if [ "$exitCode" -eq 0 ]; then
    status='✓';
    _testPassCount=$((_testPassCount+1));
  else
    status='✗';
  fi;

  printf '%s %s\n' "$status" "$message";
}

function testSummary() {
  printf 'Passed: %s of %s tests\n' "$_testPassCount" "$_testTotalCount";
}