146 lines
4.7 KiB
ReStructuredText
146 lines
4.7 KiB
ReStructuredText
>>> from optparse import OptionParser
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>>> import os
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>>> from cStringIO import StringIO
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>>> import nose.config
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All commandline options to fall back to values configured in
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configuration files. The configuration lives in a single section
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("nosetests") in each configuration file.
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>>> support = os.path.join(os.path.dirname(__file__), "support",
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... "config_defaults")
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>>> def error(msg):
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... print "error: %s" % msg
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>>> def get_parser():
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... parser = OptionParser()
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... parser.add_option(
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... "-v", "--verbose",
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... action="count", dest="verbosity",
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... default=1)
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... parser.add_option(
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... "--verbosity", action="store", dest="verbosity",
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... type="int")
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... return nose.config.ConfiguredDefaultsOptionParser(parser,
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... "nosetests",
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... error)
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>>> def parse(args, config_files):
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... argv = ["nosetests"] + list(args)
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... return get_parser().parseArgsAndConfigFiles(argv, config_files)
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Options on the command line combine with the defaults from the config
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files and the options' own defaults (here, -v adds 1 to verbosity of 3
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from a.cfg). Config file defaults take precedence over options'
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defaults.
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>>> options, args = parse([], [])
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>>> options.verbosity
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1
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>>> options, args = parse([], os.path.join(support, "a.cfg"))
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>>> options.verbosity
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3
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>>> options, args = parse(["-v"], os.path.join(support, "a.cfg"))
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>>> options.verbosity
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4
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Command line arguments take precedence
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>>> options, args = parse(["--verbosity=7"], os.path.join(support, "a.cfg"))
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>>> options.verbosity
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7
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Where options appear in several config files, the last config file wins
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>>> files = [os.path.join(support, "b.cfg"), os.path.join(support, "a.cfg")]
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>>> options, args = parse([], files)
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>>> options.verbosity
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3
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Invalid values should cause an error specifically about configuration
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files (not about a commandline option)
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>>> options, arguments = parse([], StringIO("""\
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... [nosetests]
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... verbosity = spam
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... """))
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error: Error reading config file '<???>': option 'verbosity': invalid integer value: 'spam'
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Unrecognised option in nosetests config section
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>>> options, args = parse([], StringIO("[nosetests]\nspam=eggs\n"))
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error: Error reading config file '<???>': no such option 'spam'
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If there were multiple config files, the error message tells us which
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file contains the bad option name or value
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>>> options, args = parse([], [os.path.join(support, "a.cfg"),
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... os.path.join(support, "invalid_value.cfg"),
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... os.path.join(support, "b.cfg")])
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... # doctest: +ELLIPSIS
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error: Error reading config file '...invalid_value.cfg': option 'verbosity': invalid integer value: 'spam'
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Invalid config files
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(file-like object)
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>>> options, args = parse([], StringIO("spam")) # doctest: +ELLIPSIS
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error: Error reading config file '<???>': File contains no section headers.
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file: ...<???>..., line: 1
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'spam'
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(filename)
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>>> options, args = parse([], os.path.join(support, "invalid.cfg"))
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... # doctest: +ELLIPSIS
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error: Error reading config file '...invalid.cfg': File contains no section headers.
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file: ...invalid.cfg..., line: 1
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'spam\n'
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(filenames, length == 1)
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>>> options, args = parse([], [os.path.join(support, "invalid.cfg")])
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... # doctest: +ELLIPSIS
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error: Error reading config file '...invalid.cfg': File contains no section headers.
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file: ...invalid.cfg..., line: 1
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'spam\n'
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(filenames, length > 1)
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If there were multiple config files, the error message tells us which
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file is bad
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>>> options, args = parse([], [os.path.join(support, "a.cfg"),
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... os.path.join(support, "invalid.cfg"),
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... os.path.join(support, "b.cfg")])
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... # doctest: +ELLIPSIS
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error: Error reading config file '...invalid.cfg': File contains no section headers.
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file: ...invalid.cfg..., line: 1
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'spam\n'
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Missing config files don't deserve an error or warning
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(filename)
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>>> options, args = parse([], os.path.join(support, "nonexistent.cfg"))
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>>> print options.__dict__
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{'verbosity': 1}
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(filenames)
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>>> options, args = parse([], [os.path.join(support, "nonexistent.cfg")])
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>>> print options.__dict__
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{'verbosity': 1}
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The same goes for missing config file section ("nosetests")
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>>> options, args = parse([], StringIO("[spam]\nfoo=bar\n"))
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>>> print options.__dict__
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{'verbosity': 1}
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