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""" Tests for L{twisted.python.usage}, a command line option parsing library. """ from __future__ import division, absolute_import from twisted.trial import unittest from twisted.python import usage class WellBehaved(usage.Options): optParameters = [['long', 'w', 'default', 'and a docstring'], ['another', 'n', 'no docstring'], ['longonly', None, 'noshort'], ['shortless', None, 'except', 'this one got docstring'], ] optFlags = [['aflag', 'f', """ flagallicious docstringness for this here """], ['flout', 'o'], ] def opt_myflag(self): self.opts['myflag'] = "PONY!" def opt_myparam(self, value): self.opts['myparam'] = "%s WITH A PONY!" % (value,) class ParseCorrectnessTests(unittest.TestCase): """ Test L{usage.Options.parseOptions} for correct values under good conditions. """ def setUp(self): """ Instantiate and parseOptions a well-behaved Options class. """ self.niceArgV = ("--long Alpha -n Beta " "--shortless Gamma -f --myflag " "--myparam Tofu").split() self.nice = WellBehaved() self.nice.parseOptions(self.niceArgV) def test_checkParameters(self): """ Parameters have correct values. """ self.assertEqual(self.nice.opts['long'], "Alpha") self.assertEqual(self.nice.opts['another'], "Beta") self.assertEqual(self.nice.opts['longonly'], "noshort") self.assertEqual(self.nice.opts['shortless'], "Gamma") def test_checkFlags(self): """ Flags have correct values. """ self.assertEqual(self.nice.opts['aflag'], 1) self.assertEqual(self.nice.opts['flout'], 0) def test_checkCustoms(self): """ Custom flags and parameters have correct values. """ self.assertEqual(self.nice.opts['myflag'], "PONY!") self.assertEqual(self.nice.opts['myparam'], "Tofu WITH A PONY!") class TypedOptions(usage.Options): optParameters = [ ['fooint', None, 392, 'Foo int', int], ['foofloat', None, 4.23, 'Foo float', float], ['eggint', None, None, 'Egg int without default', int], ['eggfloat', None, None, 'Egg float without default', float], ] def opt_under_score(self, value): """ This option has an underscore in its name to exercise the _ to - translation. """ self.underscoreValue = value opt_u = opt_under_score class TypedTests(unittest.TestCase): """ Test L{usage.Options.parseOptions} for options with forced types. """ def setUp(self): self.usage = TypedOptions() def test_defaultValues(self): """ Default values are parsed. """ argV = [] self.usage.parseOptions(argV) self.assertEqual(self.usage.opts['fooint'], 392) self.assertIsInstance(self.usage.opts['fooint'], int) self.assertEqual(self.usage.opts['foofloat'], 4.23) self.assertIsInstance(self.usage.opts['foofloat'], float) self.assertIsNone(self.usage.opts['eggint']) self.assertIsNone(self.usage.opts['eggfloat']) def test_parsingValues(self): """ int and float values are parsed. """ argV = ("--fooint 912 --foofloat -823.1 " "--eggint 32 --eggfloat 21").split() self.usage.parseOptions(argV) self.assertEqual(self.usage.opts['fooint'], 912) self.assertIsInstance(self.usage.opts['fooint'], int) self.assertEqual(self.usage.opts['foofloat'], -823.1) self.assertIsInstance(self.usage.opts['foofloat'], float) self.assertEqual(self.usage.opts['eggint'], 32) self.assertIsInstance(self.usage.opts['eggint'], int) self.assertEqual(self.usage.opts['eggfloat'], 21.) self.assertIsInstance(self.usage.opts['eggfloat'], float) def test_underscoreOption(self): """ A dash in an option name is translated to an underscore before being dispatched to a handler. """ self.usage.parseOptions(['--under-score', 'foo']) self.assertEqual(self.usage.underscoreValue, 'foo') def test_underscoreOptionAlias(self): """ An option name with a dash in it can have an alias. """ self.usage.parseOptions(['-u', 'bar']) self.assertEqual(self.usage.underscoreValue, 'bar') def test_invalidValues(self): """ Passing wrong values raises an error. """ argV = "--fooint egg".split() self.assertRaises(usage.UsageError, self.usage.parseOptions, argV) class WrongTypedOptions(usage.Options): optParameters = [ ['barwrong', None, None, 'Bar with wrong coerce', 'he'] ] class WeirdCallableOptions(usage.Options): def _bar(value): raise RuntimeError("Ouch") def _foo(value): raise ValueError("Yay") optParameters = [ ['barwrong', None, None, 'Bar with strange callable', _bar], ['foowrong', None, None, 'Foo with strange callable', _foo] ] class WrongTypedTests(unittest.TestCase): """ Test L{usage.Options.parseOptions} for wrong coerce options. """ def test_nonCallable(self): """ Using a non-callable type fails. """ us = WrongTypedOptions() argV = "--barwrong egg".split() self.assertRaises(TypeError, us.parseOptions, argV) def test_notCalledInDefault(self): """ The coerce functions are not called if no values are provided. """ us = WeirdCallableOptions() argV = [] us.parseOptions(argV) def test_weirdCallable(self): """ Errors raised by coerce functions are handled properly. """ us = WeirdCallableOptions() argV = "--foowrong blah".split() # ValueError is swallowed as UsageError e = self.assertRaises(usage.UsageError, us.parseOptions, argV) self.assertEqual(str(e), "Parameter type enforcement failed: Yay") us = WeirdCallableOptions() argV = "--barwrong blah".split() # RuntimeError is not swallowed self.assertRaises(RuntimeError, us.parseOptions, argV) class OutputTests(unittest.TestCase): def test_uppercasing(self): """ Error output case adjustment does not mangle options """ opt = WellBehaved() e = self.assertRaises(usage.UsageError, opt.parseOptions, ['-Z']) self.assertEqual(str(e), 'option -Z not recognized') class InquisitionOptions(usage.Options): optFlags = [ ('expect', 'e'), ] optParameters = [ ('torture-device', 't', 'comfy-chair', 'set preferred torture device'), ] class HolyQuestOptions(usage.Options): optFlags = [('horseback', 'h', 'use a horse'), ('for-grail', 'g'), ] class SubCommandOptions(usage.Options): optFlags = [('europian-swallow', None, 'set default swallow type to Europian'), ] subCommands = [ ('inquisition', 'inquest', InquisitionOptions, 'Perform an inquisition'), ('holyquest', 'quest', HolyQuestOptions, 'Embark upon a holy quest'), ] class SubCommandTests(unittest.TestCase): """ Test L{usage.Options.parseOptions} for options with subcommands. """ def test_simpleSubcommand(self): """ A subcommand is recognized. """ o = SubCommandOptions() o.parseOptions(['--europian-swallow', 'inquisition']) self.assertTrue(o['europian-swallow']) self.assertEqual(o.subCommand, 'inquisition') self.assertIsInstance(o.subOptions, InquisitionOptions) self.assertFalse(o.subOptions['expect']) self.assertEqual(o.subOptions['torture-device'], 'comfy-chair') def test_subcommandWithFlagsAndOptions(self): """ Flags and options of a subcommand are assigned. """ o = SubCommandOptions() o.parseOptions(['inquisition', '--expect', '--torture-device=feather']) self.assertFalse(o['europian-swallow']) self.assertEqual(o.subCommand, 'inquisition') self.assertIsInstance(o.subOptions, InquisitionOptions) self.assertTrue(o.subOptions['expect']) self.assertEqual(o.subOptions['torture-device'], 'feather') def test_subcommandAliasWithFlagsAndOptions(self): """ Flags and options of a subcommand alias are assigned. """ o = SubCommandOptions() o.parseOptions(['inquest', '--expect', '--torture-device=feather']) self.assertFalse(o['europian-swallow']) self.assertEqual(o.subCommand, 'inquisition') self.assertIsInstance(o.subOptions, InquisitionOptions) self.assertTrue(o.subOptions['expect']) self.assertEqual(o.subOptions['torture-device'], 'feather') def test_anotherSubcommandWithFlagsAndOptions(self): """ Flags and options of another subcommand are assigned. """ o = SubCommandOptions() o.parseOptions(['holyquest', '--for-grail']) self.assertFalse(o['europian-swallow']) self.assertEqual(o.subCommand, 'holyquest') self.assertIsInstance(o.subOptions, HolyQuestOptions) self.assertFalse(o.subOptions['horseback']) self.assertTrue(o.subOptions['for-grail']) def test_noSubcommand(self): """ If no subcommand is specified and no default subcommand is assigned, a subcommand will not be implied. """ o = SubCommandOptions() o.parseOptions(['--europian-swallow']) self.assertTrue(o['europian-swallow']) self.assertIsNone(o.subCommand) self.assertFalse(hasattr(o, 'subOptions')) def test_defaultSubcommand(self): """ Flags and options in the default subcommand are assigned. """ o = SubCommandOptions() o.defaultSubCommand = 'inquest' o.parseOptions(['--europian-swallow']) self.assertTrue(o['europian-swallow']) self.assertEqual(o.subCommand, 'inquisition') self.assertIsInstance(o.subOptions, InquisitionOptions) self.assertFalse(o.subOptions['expect']) self.assertEqual(o.subOptions['torture-device'], 'comfy-chair') def test_subCommandParseOptionsHasParent(self): """ The parseOptions method from the Options object specified for the given subcommand is called. """ class SubOpt(usage.Options): def parseOptions(self, *a, **kw): self.sawParent = self.parent usage.Options.parseOptions(self, *a, **kw) class Opt(usage.Options): subCommands = [ ('foo', 'f', SubOpt, 'bar'), ] o = Opt() o.parseOptions(['foo']) self.assertTrue(hasattr(o.subOptions, 'sawParent')) self.assertEqual(o.subOptions.sawParent , o) def test_subCommandInTwoPlaces(self): """ The .parent pointer is correct even when the same Options class is used twice. """ class SubOpt(usage.Options): pass class OptFoo(usage.Options): subCommands = [ ('foo', 'f', SubOpt, 'quux'), ] class OptBar(usage.Options): subCommands = [ ('bar', 'b', SubOpt, 'quux'), ] oFoo = OptFoo() oFoo.parseOptions(['foo']) oBar=OptBar() oBar.parseOptions(['bar']) self.assertTrue(hasattr(oFoo.subOptions, 'parent')) self.assertTrue(hasattr(oBar.subOptions, 'parent')) self.failUnlessIdentical(oFoo.subOptions.parent, oFoo) self.failUnlessIdentical(oBar.subOptions.parent, oBar) class HelpStringTests(unittest.TestCase): """ Test generated help strings. """ def setUp(self): """ Instantiate a well-behaved Options class. """ self.niceArgV = ("--long Alpha -n Beta " "--shortless Gamma -f --myflag " "--myparam Tofu").split() self.nice = WellBehaved() def test_noGoBoom(self): """ __str__ shouldn't go boom. """ try: self.nice.__str__() except Exception as e: self.fail(e) def test_whitespaceStripFlagsAndParameters(self): """ Extra whitespace in flag and parameters docs is stripped. """ # We test this by making sure aflag and it's help string are on the # same line. lines = [s for s in str(self.nice).splitlines() if s.find("aflag")>=0] self.assertTrue(len(lines) > 0) self.assertTrue(lines[0].find("flagallicious") >= 0) class PortCoerceTests(unittest.TestCase): """ Test the behavior of L{usage.portCoerce}. """ def test_validCoerce(self): """ Test the answers with valid input. """ self.assertEqual(0, usage.portCoerce("0")) self.assertEqual(3210, usage.portCoerce("3210")) self.assertEqual(65535, usage.portCoerce("65535")) def test_errorCoerce(self): """ Test error path. """ self.assertRaises(ValueError, usage.portCoerce, "") self.assertRaises(ValueError, usage.portCoerce, "-21") self.assertRaises(ValueError, usage.portCoerce, "212189") self.assertRaises(ValueError, usage.portCoerce, "foo") class ZshCompleterTests(unittest.TestCase): """ Test the behavior of the various L{twisted.usage.Completer} classes for producing output usable by zsh tab-completion system. """ def test_completer(self): """ Completer produces zsh shell-code that produces no completion matches. """ c = usage.Completer() got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, ':some-option:') c = usage.Completer(descr='some action', repeat=True) got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, '*:some action:') def test_files(self): """ CompleteFiles produces zsh shell-code that completes file names according to a glob. """ c = usage.CompleteFiles() got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, ':some-option (*):_files -g "*"') c = usage.CompleteFiles('*.py') got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, ':some-option (*.py):_files -g "*.py"') c = usage.CompleteFiles('*.py', descr="some action", repeat=True) got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, '*:some action (*.py):_files -g "*.py"') def test_dirs(self): """ CompleteDirs produces zsh shell-code that completes directory names. """ c = usage.CompleteDirs() got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, ':some-option:_directories') c = usage.CompleteDirs(descr="some action", repeat=True) got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, '*:some action:_directories') def test_list(self): """ CompleteList produces zsh shell-code that completes words from a fixed list of possibilities. """ c = usage.CompleteList('ABC') got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, ':some-option:(A B C)') c = usage.CompleteList(['1', '2', '3']) got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, ':some-option:(1 2 3)') c = usage.CompleteList(['1', '2', '3'], descr='some action', repeat=True) got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, '*:some action:(1 2 3)') def test_multiList(self): """ CompleteMultiList produces zsh shell-code that completes multiple comma-separated words from a fixed list of possibilities. """ c = usage.CompleteMultiList('ABC') got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, ':some-option:_values -s , \'some-option\' A B C') c = usage.CompleteMultiList(['1','2','3']) got = c._shellCode('some-option', usage._ZSH) self.assertEqual(got, ':some-option:_values -s , \'some-option\' 1 2 3') c = usage.CompleteMultiList(['1','2','3'], descr='some action', repeat=True) got = c._shellCode('some-option', usage._ZSH) expected = '*:some action:_values -s , \'some action\' 1 2 3' self.assertEqual(got, expected) def test_usernames(self): """ CompleteUsernames produces zsh shell-code that completes system usernames. """ c = usage.CompleteUsernames() out = c._shellCode('some-option', usage._ZSH) self.assertEqual(out, ':some-option:_users') c = usage.CompleteUsernames(descr='some action', repeat=True) out = c._shellCode('some-option', usage._ZSH) self.assertEqual(out, '*:some action:_users') def test_groups(self): """ CompleteGroups produces zsh shell-code that completes system group names. """ c = usage.CompleteGroups() out = c._shellCode('some-option', usage._ZSH) self.assertEqual(out, ':group:_groups') c = usage.CompleteGroups(descr='some action', repeat=True) out = c._shellCode('some-option', usage._ZSH) self.assertEqual(out, '*:some action:_groups') def test_hostnames(self): """ CompleteHostnames produces zsh shell-code that completes hostnames. """ c = usage.CompleteHostnames() out = c._shellCode('some-option', usage._ZSH) self.assertEqual(out, ':some-option:_hosts') c = usage.CompleteHostnames(descr='some action', repeat=True) out = c._shellCode('some-option', usage._ZSH) self.assertEqual(out, '*:some action:_hosts') def test_userAtHost(self): """ CompleteUserAtHost produces zsh shell-code that completes hostnames or a word of the form @. """ c = usage.CompleteUserAtHost() out = c._shellCode('some-option', usage._ZSH) self.assertTrue(out.startswith(':host | user@host:')) c = usage.CompleteUserAtHost(descr='some action', repeat=True) out = c._shellCode('some-option', usage._ZSH) self.assertTrue(out.startswith('*:some action:')) def test_netInterfaces(self): """ CompleteNetInterfaces produces zsh shell-code that completes system network interface names. """ c = usage.CompleteNetInterfaces() out = c._shellCode('some-option', usage._ZSH) self.assertEqual(out, ':some-option:_net_interfaces') c = usage.CompleteNetInterfaces(descr='some action', repeat=True) out = c._shellCode('some-option', usage._ZSH) self.assertEqual(out, '*:some action:_net_interfaces') class CompleterNotImplementedTests(unittest.TestCase): """ Using an unknown shell constant with the various Completer() classes should raise NotImplementedError """ def test_unknownShell(self): """ Using an unknown shellType should raise NotImplementedError """ classes = [usage.Completer, usage.CompleteFiles, usage.CompleteDirs, usage.CompleteList, usage.CompleteMultiList, usage.CompleteUsernames, usage.CompleteGroups, usage.CompleteHostnames, usage.CompleteUserAtHost, usage.CompleteNetInterfaces] for cls in classes: try: action = cls() except: action = cls(None) self.assertRaises(NotImplementedError, action._shellCode, None, "bad_shell_type") class FlagFunctionTests(unittest.TestCase): """ Tests for L{usage.flagFunction}. """ class SomeClass(object): """ Dummy class for L{usage.flagFunction} tests. """ def oneArg(self, a): """ A one argument method to be tested by L{usage.flagFunction}. @param a: a useless argument to satisfy the function's signature. """ def noArg(self): """ A no argument method to be tested by L{usage.flagFunction}. """ def manyArgs(self, a, b, c): """ A multiple arguments method to be tested by L{usage.flagFunction}. @param a: a useless argument to satisfy the function's signature. @param b: a useless argument to satisfy the function's signature. @param c: a useless argument to satisfy the function's signature. """ def test_hasArg(self): """ L{usage.flagFunction} returns C{False} if the method checked allows exactly one argument. """ self.assertIs(False, usage.flagFunction(self.SomeClass().oneArg)) def test_noArg(self): """ L{usage.flagFunction} returns C{True} if the method checked allows exactly no argument. """ self.assertIs(True, usage.flagFunction(self.SomeClass().noArg)) def test_tooManyArguments(self): """ L{usage.flagFunction} raises L{usage.UsageError} if the method checked allows more than one argument. """ exc = self.assertRaises( usage.UsageError, usage.flagFunction, self.SomeClass().manyArgs) self.assertEqual("Invalid Option function for manyArgs", str(exc)) def test_tooManyArgumentsAndSpecificErrorMessage(self): """ L{usage.flagFunction} uses the given method name in the error message raised when the method allows too many arguments. """ exc = self.assertRaises( usage.UsageError, usage.flagFunction, self.SomeClass().manyArgs, "flubuduf") self.assertEqual("Invalid Option function for flubuduf", str(exc)) class OptionsInternalTests(unittest.TestCase): """ Tests internal behavior of C{usage.Options}. """ def test_optionsAliasesOrder(self): """ Options which are synonyms to another option are aliases towards the longest option name. """ class Opts(usage.Options): def opt_very_very_long(self): """ This is an option method with a very long name, that is going to be aliased. """ opt_short = opt_very_very_long opt_s = opt_very_very_long opts = Opts() self.assertEqual( dict.fromkeys( ["s", "short", "very-very-long"], "very-very-long"), { "s": opts.synonyms["s"], "short": opts.synonyms["short"], "very-very-long": opts.synonyms["very-very-long"], })