Usage: spec [OPTION]...

OPTIONS
              --help              display this help and exit
              --ignore-dot-hspec  do not read options from ~/.hspec and .hspec
  -m PATTERN  --match=PATTERN     only run examples that match given PATTERN
              --skip=PATTERN      skip examples that match given PATTERN

RUNNER OPTIONS
        --[no-]dry-run          pretend that everything passed; don't verify
                                anything
        --[no-]focused-only     do not run anything, unless there are focused
                                spec items
        --[no-]fail-on=ITEMS    empty: fail if all spec items have been filtered
                                focused: fail on focused spec items
                                pending: fail on pending spec items
                                empty-description: fail on empty descriptions
        --[no-]strict           same as --fail-on=focused,pending
        --[no-]fail-fast        abort on first failure
        --[no-]randomize        randomize execution order
  -r    --rerun                 rerun all examples that failed in the previous
                                test run (only works in combination with
                                --failure-report or in GHCi)
        --failure-report=FILE   read/write a failure report for use with --rerun
        --rerun-all-on-success  run the whole test suite after a previously
                                failing rerun succeeds for the first time (only
                                works in combination with --rerun)
  -j N  --jobs=N                run at most N parallelizable tests
                                simultaneously (default: number of available
                                processors)

FORMATTER OPTIONS
  -f NAME  --format=NAME           use a custom formatter; this can be one of
                                   checks, specdoc, progress, failed-examples or
                                   silent
           --[no-]color            colorize the output
           --[no-]unicode          output unicode
           --[no-]diff             show colorized diffs
           --diff-context=N        output N lines of diff context (default: 3)
                                   use a value of 'full' to see the full context
           --diff-command=CMD      use an external diff command
                                   example: --diff-command="git diff"
           --[no-]pretty           try to pretty-print diff values
           --show-exceptions       use `show` when formatting exceptions
           --display-exceptions    use `displayException` when formatting
                                   exceptions
           --[no-]times            report times for individual spec items
           --print-cpu-time        include used CPU time in summary
  -p[N]    --print-slow-items[=N]  print the N slowest spec items (default: 10)
           --[no-]expert           be less verbose

OPTIONS FOR QUICKCHECK
  -a N  --qc-max-success=N  maximum number of successful tests before a
                            QuickCheck property succeeds
        --qc-max-discard=N  maximum number of discarded tests per successful
                            test before giving up
        --qc-max-size=N     size to use for the biggest test cases
        --qc-max-shrinks=N  maximum number of shrinks to perform before giving
                            up (a value of 0 turns shrinking off)
        --seed=N            used seed for QuickCheck properties

OPTIONS FOR SMALLCHECK
    --depth=N  maximum depth of generated test values for SmallCheck properties