Man page 1 : trial

trial - run unit tests

trial [options] [[file|package|module|TestCase|testmethod]...]

trial --help

trial loads and executes a suite of unit tests, obtained from modules, packages and files listed on the command line.

trial will take either filenames or fully qualified Python names as arguments. Thus 'trial myproject/foo.py', 'trial myproject.foo' and 'trial myproject.foo.SomeTestCase.test_method' are all valid ways to invoke trial.

• -b, --debug
      Run the tests in the Python debugger. Also does post-mortem debugging on exceptions. Will load '.pdbrc' from current directory if it exists.
• -B, --debug-stacktraces
      Report Deferred creation and callback stack traces
• --coverage
      Generate coverage information in _trial_temp/coverage/. Requires Python 2.3 or higher.
• --disablegc
      Disable the garbage collector. I don't know why this is in trial.
• -x, --extra
      Add an extra argument. (This is a hack necessary for interfacing with emacs's `gud'.)
• -e, --rterrors
      Print tracebacks to standard output as soon as they occur
• --force-gc
      Run gc.collect() before and after each test case. This can be used to isolate errors that occur when objects get collected. This option would be the default, except it makes tests run about ten times slower.
• -h, --help
      Print a usage message to standard output, then exit.
• --help-reporters
      Print a list of valid reporters to standard output, then exit.
• --help-reactors
      List the names of possibly available reactors.
• -l, --logfile <logfile>
      Direct the log to a different file. The default file is 'test.log'. <logfile> is relative to _trial_temp.
• -n, --dry-run
      Go through all the tests and make them pass without running.
• -N, --no-recurse
      By default, trial recurses through packages to find every module inside every subpackage. Unless, that is, you specify this option.
• --nopm
      Don't automatically jump into debugger for post-mortem analysis of exceptions. Only usable in conjunction with --debug.
• --profile
      Run tests under the Python profiler.
• -r, --reactor <reactor>
      Choose which reactor to use. See --help-reactors for a list.
• --recursionlimit
      Set Python's recursion limit. See sys.setrecursionlimit()
• --reporter
      Select the reporter to use for Trial's output. Use the --help-reporters option to see a list of valid reporters.
• --spew
      Print an insanely verbose log of everything that happens. Useful when debugging freezes or locks in complex code.
• --tbformat <format>
      Format to display tracebacks with. Acceptable values are 'default', 'brief' and 'verbose'. 'brief' produces tracebacks that play nicely with Emacs' GUD.
• --temp-directory <directory>
      WARNING: Do not use this options unless you know what you are doing. By default, trial creates a directory called _trial_temp under the current working directory. When trial runs, it first deletes this directory, then creates it, then changes into the directory to run the tests. The log file and any coverage files are stored here. Use this option if you wish to have trial run in a directory other than _trial_temp. Be warned, trial will delete the directory before re-creating it.
• --testmodule <filename>
      Ask trial to look into <filename> and run any tests specified using the Emacs-style buffer variable 'test-case-name'.
• --unclean-warnings
      As of Twisted 8.0, trial will report an error if the reactor is left unclean at the end of the test. This option is provided to assist in migrating from Twisted 2.5 to Twisted 8.0 and later. Enabling this option will turn the errors into warnings.
• -u, --until-failure
      Keep looping the tests until one of them raises an error or a failure. This is particularly useful for reproducing intermittent failures.
• --version
      Prints the Twisted version number and exit.
• --without-module <modulenames>
      Simulate the lack of the specified comma-separated list of modules. This makes it look like the modules are not present in the system, causing tests to check the behavior for that configuration.
• -z, --random [<seed>]
      Run the tests in random order using the specified seed.

Written by Jonathan M. Lange

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