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import operator
from param import Callable, Integer, Number, Parameterized, String, bind
def identity(*args, **kwargs):
return args, kwargs
class Parameters(Parameterized):
string = String(default="string")
integer = Integer(default=7)
number = Number(default=3.14)
function = Callable()
def test_bind_constant_arg():
assert bind(identity, 1)() == ((1,), {})
def test_bind_constant_arg_partial():
assert bind(identity, 1)(2) == ((1, 2), {})
def test_bind_constant_args():
assert bind(identity, 1, 2)() == ((1, 2), {})
def test_bind_constant_kwarg():
assert bind(identity, foo=1)() == ((), {'foo': 1})
def test_bind_constant_kwarg_partial():
assert bind(identity, foo=1)(bar=2) == ((), {'foo': 1, 'bar': 2})
def test_bind_constant_kwargs():
assert bind(identity, foo=1, bar=2)() == ((), {'foo': 1, 'bar': 2})
def test_bind_constant_args_and_kwargs():
assert bind(identity, 1, bar=2)() == ((1,), {'bar': 2})
def test_bind_constant_args_and_kwargs_partial():
assert bind(identity, 1, bar=3)(2, baz=4) == ((1, 2), {'bar': 3, 'baz': 4})
def test_curry_bind_args():
assert bind(bind(identity, 1), 2)() == ((1, 2), {})
def test_curry_bind_kwargs():
assert bind(bind(identity, foo=1), bar=2)() == ((), {'foo': 1, 'bar': 2})
def test_bind_class_param_as_arg():
bound_fn = bind(identity, Parameters.param.string)
assert bound_fn() == (('string',), {})
def test_bind_class_params_as_args():
bound_fn = bind(identity, Parameters.param.string, Parameters.param.number)
assert bound_fn() == (('string', 3.14), {})
def test_bind_class_param_as_kwarg():
bound_fn = bind(identity, string=Parameters.param.string)
assert bound_fn() == ((), {'string': 'string'})
def test_bind_class_params_as_kwargs():
bound_fn = bind(
identity, string=Parameters.param.string, num=Parameters.param.number
)
assert bound_fn() == ((), {'string': 'string', 'num': 3.14})
def test_bind_class_params_as_args_and_kwargs():
bound_fn = bind(
identity, Parameters.param.string, num=Parameters.param.number
)
assert bound_fn() == (('string',), {'num': 3.14})
def test_bind_instance_param_as_arg():
P = Parameters()
bound_fn = bind(identity, P.param.string)
assert bound_fn() == (('string',), {})
P.string = 'baz'
assert bound_fn() == (('baz',), {})
def test_bind_instance_params_as_args():
P = Parameters()
bound_fn = bind(identity, P.param.string, P.param.number)
assert bound_fn() == (('string', 3.14), {})
P.string = 'baz'
assert bound_fn() == (('baz', 3.14), {})
P.number = 6.28
assert bound_fn() == (('baz', 6.28), {})
def test_bind_instance_params_and_constant_as_args():
P = Parameters()
bound_fn = bind(identity, P.param.string, 'foo', P.param.number)
assert bound_fn() == (('string', 'foo', 3.14), {})
P.string = 'baz'
assert bound_fn() == (('baz', 'foo', 3.14), {})
P.number = 6.28
assert bound_fn() == (('baz', 'foo', 6.28), {})
def test_bind_instance_param_as_kwarg():
P = Parameters()
bound_fn = bind(identity, string=P.param.string)
assert bound_fn() == ((), {'string': 'string'})
P.string = 'baz'
assert bound_fn() == ((), {'string': 'baz'})
def test_bind_instance_params_as_kwargs():
P = Parameters()
bound_fn = bind(
identity, string=P.param.string, num=P.param.number
)
assert bound_fn() == ((), {'string': 'string', 'num': 3.14})
P.string = 'baz'
assert bound_fn() == ((), {'string': 'baz', 'num': 3.14})
P.number = 6.28
assert bound_fn() == ((), {'string': 'baz', 'num': 6.28})
def test_bind_instance_params_and_constant_as_kwargs():
P = Parameters()
bound_fn = bind(
identity, string=P.param.string, num=P.param.number, foo='bar'
)
assert bound_fn() == ((), {'string': 'string', 'num': 3.14, 'foo': 'bar'})
P.string = 'baz'
assert bound_fn() == ((), {'string': 'baz', 'num': 3.14, 'foo': 'bar'})
P.number = 6.28
assert bound_fn() == ((), {'string': 'baz', 'num': 6.28, 'foo': 'bar'})
def test_bind_instance_params_as_args_and_kwargs():
P = Parameters()
bound_fn = bind(
identity, P.param.string, num=P.param.number
)
assert bound_fn() == (('string',), {'num': 3.14})
P.string = 'baz'
assert bound_fn() == (('baz',), {'num': 3.14})
P.number = 6.28
assert bound_fn() == (('baz',), {'num': 6.28})
def test_bind_instance_params_and_constants_as_args_and_kwargs():
P = Parameters()
bound_fn = bind(
identity, 'foo', P.param.string, num=P.param.number, bar=6
)
assert bound_fn() == (('foo', 'string',), {'num': 3.14, 'bar': 6})
P.string = 'baz'
assert bound_fn() == (('foo', 'baz',), {'num': 3.14, 'bar': 6})
P.number = 6.28
assert bound_fn() == (('foo', 'baz',), {'num': 6.28, 'bar': 6})
def test_bind_curry_function_with_deps():
P = Parameters()
bound_fn = bind(
identity, P.param.string, num=P.param.number
)
curried_fn = bind(bound_fn, const=3)
assert curried_fn() == (('string',), {'num': 3.14, 'const': 3})
P.string = 'baz'
assert curried_fn() == (('baz',), {'num': 3.14, 'const': 3})
P.number = 6.28
assert curried_fn() == (('baz',), {'num': 6.28, 'const': 3})
def test_bind_bound_function_to_arg():
P = Parameters(integer=1)
def add1(value):
return value + 1
def divide(value):
return value / 2
bound_function = bind(divide, bind(add1, P.param.integer))
assert bound_function() == 1
P.integer = 3
assert bound_function() == 2
def test_bind_bound_function_to_kwarg():
P = Parameters(integer=1)
def add1(value):
return value + 1
def divide(divisor=2, value=0):
return value / divisor
bound_function = bind(divide, value=bind(add1, P.param.integer))
assert bound_function() == 1
P.integer = 3
assert bound_function() == 2
def test_bind_dynamic_function():
P = Parameters(function=operator.add)
bound_function = bind(P.param.function, 3, 2)
assert bound_function() == 5
P.function = operator.sub
assert bound_function() == 1
def test_bind_generator():
P = Parameters(integer=7)
def gen(arg):
yield arg
yield arg + 1
yield arg + 2
bound_function = bind(gen, P.param.integer)
for i, v in enumerate(bound_function()):
assert v == (7 + i)
P.integer = 3
for i, v in enumerate(bound_function()):
assert v == (3 + i)
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