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138 lines
4.6 KiB
138 lines
4.6 KiB
from inspect import Parameter, signature
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from unittest import TestCase
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from ...traitlets import HasTraits, Int, Unicode
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from ..decorators import signature_has_traits
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class TestExpandSignature(TestCase):
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def test_no_init(self):
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@signature_has_traits
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class Foo(HasTraits):
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number1 = Int()
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number2 = Int()
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value = Unicode("Hello")
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parameters = signature(Foo).parameters
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parameter_names = list(parameters)
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self.assertIs(parameters["args"].kind, Parameter.VAR_POSITIONAL)
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self.assertEqual("args", parameter_names[0])
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self.assertIs(parameters["number1"].kind, Parameter.KEYWORD_ONLY)
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self.assertIs(parameters["number2"].kind, Parameter.KEYWORD_ONLY)
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self.assertIs(parameters["value"].kind, Parameter.KEYWORD_ONLY)
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self.assertIs(parameters["kwargs"].kind, Parameter.VAR_KEYWORD)
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self.assertEqual("kwargs", parameter_names[-1])
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f = Foo(number1=32, value="World")
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self.assertEqual(f.number1, 32)
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self.assertEqual(f.number2, 0)
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self.assertEqual(f.value, "World")
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def test_partial_init(self):
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@signature_has_traits
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class Foo(HasTraits):
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number1 = Int()
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number2 = Int()
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value = Unicode("Hello")
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def __init__(self, arg1, **kwargs):
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self.arg1 = arg1
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super().__init__(**kwargs)
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parameters = signature(Foo).parameters
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parameter_names = list(parameters)
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self.assertIs(parameters["arg1"].kind, Parameter.POSITIONAL_OR_KEYWORD)
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self.assertEqual("arg1", parameter_names[0])
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self.assertIs(parameters["number1"].kind, Parameter.KEYWORD_ONLY)
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self.assertIs(parameters["number2"].kind, Parameter.KEYWORD_ONLY)
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self.assertIs(parameters["value"].kind, Parameter.KEYWORD_ONLY)
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self.assertIs(parameters["kwargs"].kind, Parameter.VAR_KEYWORD)
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self.assertEqual("kwargs", parameter_names[-1])
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f = Foo(1, number1=32, value="World")
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self.assertEqual(f.arg1, 1)
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self.assertEqual(f.number1, 32)
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self.assertEqual(f.number2, 0)
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self.assertEqual(f.value, "World")
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def test_duplicate_init(self):
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@signature_has_traits
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class Foo(HasTraits):
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number1 = Int()
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number2 = Int()
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def __init__(self, number1, **kwargs):
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self.test = number1
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super().__init__(number1=number1, **kwargs)
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parameters = signature(Foo).parameters
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parameter_names = list(parameters)
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self.assertListEqual(parameter_names, ["number1", "number2", "kwargs"])
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f = Foo(number1=32, number2=36)
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self.assertEqual(f.test, 32)
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self.assertEqual(f.number1, 32)
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self.assertEqual(f.number2, 36)
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def test_full_init(self):
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@signature_has_traits
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class Foo(HasTraits):
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number1 = Int()
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number2 = Int()
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value = Unicode("Hello")
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def __init__(self, arg1, arg2=None, *pos_args, **kw_args):
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self.arg1 = arg1
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self.arg2 = arg2
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self.pos_args = pos_args
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self.kw_args = kw_args
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super().__init__(*pos_args, **kw_args)
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parameters = signature(Foo).parameters
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parameter_names = list(parameters)
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self.assertIs(parameters["arg1"].kind, Parameter.POSITIONAL_OR_KEYWORD)
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self.assertEqual("arg1", parameter_names[0])
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self.assertIs(parameters["arg2"].kind, Parameter.POSITIONAL_OR_KEYWORD)
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self.assertEqual("arg2", parameter_names[1])
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self.assertIs(parameters["pos_args"].kind, Parameter.VAR_POSITIONAL)
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self.assertEqual("pos_args", parameter_names[2])
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self.assertIs(parameters["number1"].kind, Parameter.KEYWORD_ONLY)
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self.assertIs(parameters["number2"].kind, Parameter.KEYWORD_ONLY)
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self.assertIs(parameters["value"].kind, Parameter.KEYWORD_ONLY)
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self.assertIs(parameters["kw_args"].kind, Parameter.VAR_KEYWORD)
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self.assertEqual("kw_args", parameter_names[-1])
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f = Foo(1, 3, 45, "hey", number1=32, value="World")
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self.assertEqual(f.arg1, 1)
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self.assertEqual(f.arg2, 3)
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self.assertTupleEqual(f.pos_args, (45, "hey"))
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self.assertEqual(f.number1, 32)
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self.assertEqual(f.number2, 0)
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self.assertEqual(f.value, "World")
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def test_no_kwargs(self):
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with self.assertRaises(RuntimeError):
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@signature_has_traits
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class Foo(HasTraits):
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number1 = Int()
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number2 = Int()
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def __init__(self, arg1, arg2=None):
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pass
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