Python does Examples

Example #1

class NoRoles(object):
    pass


class NoRolesChild(NoRoles):
    pass


for dog_type in (Dog, ):  #Doberman, DobermanPinscher):
    for dog in (dog_type, dog_type()):
        assert hasattr(dog, 'eat')
        assert hasattr(dog, 'wag')
        assert hasattr(dog, 'talk')
        assert hasattr(dog, 'sleep')

        assert does(dog, dog)

assert not does(NoRoles, Dog)
assert not does(NoRolesChild, Dog)

# Roles can not inherit from other roles


class BadRole(Animal):
    pass


class ThisShouldCrash(object):
    pass

Example #2

File: method_conflict.py Project: ask/roleplay

# Now create a role which consumes both
class rFooBar(Role):
    def foo_bar(self):
        return "rFooBar::foo_bar"

subroles_not_consumed = 1
try:
    has_role(rFooBar, rFoo, rBar)
except RoleConflictDetected:
    subroles_not_consumed = 0
finally:
    assert subroles_not_consumed



assert does(rFooBar, rFoo);
assert does(rFooBar, rBar);
assert not hasattr(rFooBar, 'baz')
assert hasattr(rFooBar, 'foo_bar')

# Now compose it and get the conflict:

class FooBarWithConflict2(object):
    pass

foobarwithconflict2_conflicts = 0
try:
    has_role(FooBarWithConflict2, rFooBar)
except RoleConflictDetected:
    foobarwithconflict2_conflicts = 1

Example #3

File: roles.py Project: ask/roleplay

    pass

class NoRoles(object):
    pass

class NoRolesChild(NoRoles):
    pass
  
for dog_type in (Dog, ): #Doberman, DobermanPinscher):
        for dog in (dog_type, dog_type()):
            assert hasattr(dog, 'eat')
            assert hasattr(dog, 'wag')
            assert hasattr(dog, 'talk')
            assert hasattr(dog, 'sleep')

            assert does(dog, dog)

assert not does(NoRoles, Dog)
assert not does(NoRolesChild, Dog)


# Roles can not inherit from other roles

class BadRole(Animal):
    pass

class ThisShouldCrash(object):
    pass

role_inheriting_from_role_crashes = 0
try:

Example #4

# Now create a role which consumes both
class rFooBar(Role):
    def foo_bar(self):
        return "rFooBar::foo_bar"


subroles_not_consumed = 1
try:
    has_role(rFooBar, rFoo, rBar)
except RoleConflictDetected:
    subroles_not_consumed = 0
finally:
    assert subroles_not_consumed

assert does(rFooBar, rFoo)
assert does(rFooBar, rBar)
assert not hasattr(rFooBar, 'baz')
assert hasattr(rFooBar, 'foo_bar')

# Now compose it and get the conflict:


class FooBarWithConflict2(object):
    pass


foobarwithconflict2_conflicts = 0
try:
    has_role(FooBarWithConflict2, rFooBar)
except RoleConflictDetected: