/usr/share/pyshared/martian/edgecase.txt is in python-martian 0.14-0ubuntu1.
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============================================
ModuleGrokker ignores values set by directives
----------------------------------------------
Consider the following module-level directive:
>>> import martian
>>> class store(martian.Directive):
... scope = martian.MODULE
... store = martian.ONCE
...
>>> store.__module__ = 'somethingelse' # just so that it isn't __builtin__
Now let's look at a module that contains a simple function and a call
to the directive defined above:
>>> class module_with_directive(FakeModule):
... fake_module = True
...
... def some_function():
... return 11
...
... store(some_function)
...
>>> from martiantest.fake import module_with_directive
Now imagine we have the following grokker for functions:
>>> import types
>>> class FunctionGrokker(martian.InstanceGrokker):
... martian.component(types.FunctionType)
... def grok(self, name, obj, **kw):
... print name, obj()
... return True
...
>>> module_grokker = martian.ModuleGrokker()
>>> module_grokker.register(FunctionGrokker())
and let it loose on the module, we see that it will only find functions
set by regular variable assignment, not the ones stored by the
directive:
>>> module_grokker.grok('module_with_directive', module_with_directive)
some_function 11
True
Directive scope and default edge cases
--------------------------------------
>>> from martian import Directive, CLASS_OR_MODULE, CLASS, MODULE
>>> from martian import ONCE
MODULE scope directive on a module, with no explicit value::
>>> class mydir(martian.Directive):
... scope = MODULE
... store = ONCE
>>> class module_no_explicit_value(FakeModule):
... fake_module = True
>>> from martiantest.fake import module_no_explicit_value
>>> mydir.bind().get(module_no_explicit_value) is None
True
MODULE scope directive on a module, with an explicit value::
>>> class mydir2(martian.Directive):
... scope = MODULE
... store = ONCE
>>> class module_with_explicit_value(FakeModule):
... fake_module = True
... mydir2('the explicit value')
>>> from martiantest.fake import module_with_explicit_value
>>> mydir2.bind().get(module_with_explicit_value)
'the explicit value'
MODULE scope directive on a module, with no explicit value, with a custom default::
>>> class mydir(martian.Directive):
... scope = MODULE
... store = ONCE
>>> class module_custom_default(FakeModule):
... fake_module = True
>>> from martiantest.fake import module_custom_default
>>> def custom(component, module, **data):
... return 'a custom default value'
>>> mydir.bind(get_default=custom).get(module_custom_default)
'a custom default value'
CLASS scope directive on a class, with no explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS
... store = ONCE
>>> class module_get_from_class_no_explicit(FakeModule):
... class MyClass(object):
... pass
>>> from martiantest.fake import module_get_from_class_no_explicit
>>> mydir.bind().get(module_get_from_class_no_explicit.MyClass) is None
True
CLASS scope directive on an instance, with no explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS
... store = ONCE
>>> class module_get_from_instance_no_explicit(FakeModule):
... class MyClass(object):
... pass
... obj = MyClass()
>>> from martiantest.fake import module_get_from_instance_no_explicit
>>> mydir.bind().get(module_get_from_instance_no_explicit.obj) is None
True
CLASS scope directive on a class, with an explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS
... store = ONCE
>>> class module_get_from_class_with_explicit(FakeModule):
... class MyClass(object):
... mydir('explicitly set')
>>> from martiantest.fake import module_get_from_class_with_explicit
>>> mydir.bind().get(module_get_from_class_with_explicit.MyClass)
'explicitly set'
CLASS scope directive on an instance, with an explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS
... store = ONCE
>>> class module_get_from_instance_with_explicit(FakeModule):
... class MyClass(object):
... mydir('explicitly set')
... obj = MyClass()
>>> from martiantest.fake import module_get_from_instance_with_explicit
>>> mydir.bind().get(module_get_from_instance_with_explicit.obj)
'explicitly set'
CLASS scope directive on a class, with a custom default::
>>> class mydir(martian.Directive):
... scope = CLASS
... store = ONCE
>>> class module_get_from_class_with_custom(FakeModule):
... class MyClass(object):
... pass
>>> from martiantest.fake import module_get_from_class_with_custom
>>> def custom_get_default(component, module, **data):
... return 'custom default'
>>> mydir.bind(get_default=custom_get_default).get(
... module_get_from_class_with_custom.MyClass)
'custom default'
CLASS scope directive on an instance, with a custom default::
>>> class mydir(martian.Directive):
... scope = CLASS
... store = ONCE
>>> class module_get_from_instance_with_custom(FakeModule):
... class MyClass(object):
... pass
... obj = MyClass()
>>> from martiantest.fake import module_get_from_instance_with_custom
>>> mydir.bind(get_default=custom_get_default).get(
... module_get_from_instance_with_custom.obj)
'custom default'
CLASS_OR_MODULE scope directive on a module, with no explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module(FakeModule):
... fake_module = True
... pass
>>> from martiantest.fake import module
>>> mydir.bind().get(module) is None
True
CLASS_OR_MODULE scope directive on a class, with no explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module(FakeModule):
... fake_module = True
... class MyClass(object):
... pass
>>> from martiantest.fake import module
>>> mydir.bind().get(module.MyClass) is None
True
CLASS_OR_MODULE scope directive on an instance, with no explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module(FakeModule):
... fake_module = True
... class MyClass(object):
... pass
... obj = MyClass()
>>> from martiantest.fake import module
>>> mydir.bind().get(module.obj) is None
True
CLASS_OR_MODULE scope directive on a module, with an explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module(FakeModule):
... fake_module = True
... mydir('explicitly set, see?')
>>> from martiantest.fake import module
>>> mydir.bind().get(module)
'explicitly set, see?'
CLASS_OR_MODULE scope directive on a class, with an explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module(FakeModule):
... fake_module = True
... class MyClass(object):
... mydir('explicitly set, see?')
>>> from martiantest.fake import module
>>> mydir.bind().get(module.MyClass)
'explicitly set, see?'
CLASS_OR_MODULE scope directive on an instance, with an explicit value::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module(FakeModule):
... fake_module = True
... class MyClass(object):
... mydir('explicitly set, see?')
... obj = MyClass()
>>> from martiantest.fake import module
>>> mydir.bind().get(module.obj)
'explicitly set, see?'
CLASS_OR_MODULE scope directive on a module, with a custom default::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module(FakeModule):
... fake_module = True
>>> from martiantest.fake import module
>>> mydir.bind(get_default=custom_get_default).get(module)
'custom default'
CLASS_OR_MODULE scope directive on a class, with a custom default::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module(FakeModule):
... fake_module = True
... class MyClass(object):
... pass
>>> from martiantest.fake import module
>>> mydir.bind(get_default=custom_get_default).get(module.MyClass)
'custom default'
CLASS_OR_MODULE scope directive on an instance, with a custom default::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module(FakeModule):
... fake_module = True
... class MyClass(object):
... pass
... obj = MyClass()
>>> from martiantest.fake import module
>>> mydir.bind(get_default=custom_get_default).get(module.obj)
'custom default'
CLASS_OR_MODULE scope directive on the module, with inheritance::
>>> class mydir(martian.Directive):
... scope = CLASS_OR_MODULE
... store = ONCE
>>> class module_b(FakeModule):
... fake_module = True
... mydir('a value')
... class B(object):
... pass
>>> from martiantest.fake import module_b
>>> class module_a(FakeModule):
... fake_module = True
... class A(module_b.B):
... pass
>>> from martiantest.fake import module_a
>>> mydir.bind(get_default=custom_get_default).get(module_a.A)
'a value'
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