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# Adapted from https://github.com/python/cpython/blob/master/Lib/test/test_operator.py
# Licensed under the Python Software Foundation License Version 2.
# Copyright © 2001-2020 Python Software Foundation. All rights reserved.
# Copyright © 2000 BeOpen.com. All rights reserved.
# Copyright © 1995-2000 Corporation for National Research Initiatives. All rights reserved.
# Copyright © 1991-1995 Stichting Mathematisch Centrum. All rights reserved.
#
# stdlib
import pickle
from typing import Any
# 3rd party
import pytest
from funcy.funcs import rpartial # type: ignore
# this package
import domdf_python_tools
from domdf_python_tools.getters import attrgetter, itemgetter, methodcaller
evaluate = rpartial(eval, {"domdf_python_tools": domdf_python_tools}, {"domdf_python_tools": domdf_python_tools})
class TestAttrgetter:
def test_attrgetter(self):
class A:
pass
a = A()
a.name = "john" # type: ignore
b = A()
b.name = "graham" # type: ignore
f = attrgetter(0, "name")
assert f([a, b]) == "john"
f = attrgetter(1, "name")
assert f([a, b]) == "graham"
with pytest.raises(TypeError, match=r"__call__\(\) missing 1 required positional argument: 'obj'"):
f() # type: ignore
with pytest.raises(TypeError, match=r"__call__\(\) takes 2 positional arguments but 3 were given"):
f(a, "cleese") # type: ignore
with pytest.raises(TypeError, match=r"__call__\(\) got an unexpected keyword argument 'surname'"):
f(a, surname="cleese") # type: ignore
f = attrgetter(0, "rank")
with pytest.raises(AttributeError, match="'A' object has no attribute 'rank'"):
f([a, b])
with pytest.raises(TypeError, match="attribute name must be a string"):
attrgetter(0, 2) # type: ignore[arg-type]
with pytest.raises(TypeError, match="'idx' must be an integer"):
attrgetter("hello", 0) # type: ignore[arg-type]
with pytest.raises(TypeError, match=r"__init__\(\) missing 1 required positional argument: 'attr'"):
attrgetter(0) # type: ignore[call-arg]
f = attrgetter(1, "name")
with pytest.raises(IndexError, match="list index out of range"):
f([])
class C:
def __getattr__(self, name):
raise SyntaxError
with pytest.raises(SyntaxError, match="None"):
attrgetter(0, "foo")([C()])
# recursive gets
a = A()
a.name = "john" # type: ignore
a.child = A() # type: ignore
a.child.name = "thomas" # type: ignore
f = attrgetter(3, "child.name")
assert f([1, 2, 3, a]) == "thomas"
with pytest.raises(AttributeError, match="'A' object has no attribute 'child'"):
f([1, 2, 3, a.child]) # type: ignore
f = attrgetter(1, "child.name")
assert f([1, a]) == "thomas"
f = attrgetter(2, "child.child.name")
with pytest.raises(AttributeError, match="'A' object has no attribute 'child'"):
f([1, 2, a])
f = attrgetter(0, "child.")
with pytest.raises(AttributeError, match="'A' object has no attribute ''"):
f([a])
f = attrgetter(0, ".child")
with pytest.raises(AttributeError, match="'A' object has no attribute ''"):
f([a])
a.child.child = A() # type: ignore
a.child.child.name = "johnson" # type: ignore
f = attrgetter(0, "child.child.name")
assert f([a]) == "johnson"
@pytest.mark.parametrize("proto", range(pickle.HIGHEST_PROTOCOL + 1))
def test_pickle(self, proto: int):
class A:
pass
a = A()
a.x = 'X' # type: ignore
a.y = 'Y' # type: ignore
a.z = 'Z' # type: ignore
a.t = A() # type: ignore
a.t.u = A() # type: ignore
a.t.u.v = 'V' # type: ignore
f = attrgetter(0, 'x')
f2 = copy(f, proto)
assert repr(f2) == repr(f)
assert f2([a]) == f([a])
def test_repr(self):
assert repr(attrgetter(0, "name")) == "domdf_python_tools.getters.attrgetter(idx=0, attr='name')"
assert repr(attrgetter(1, "value")) == "domdf_python_tools.getters.attrgetter(idx=1, attr='value')"
evaluate(repr(attrgetter(0, "name")))
evaluate(repr(attrgetter(1, "value")))
class TestItemgetter:
def test_itemgetter(self):
a = "ABCDE"
f = itemgetter(0, 2)
assert f([a]) == 'C'
f = itemgetter(2, 2)
assert f([1, 2, a]) == 'C'
with pytest.raises(TypeError, match=r"__call__\(\) missing 1 required positional argument: 'obj'"):
f() # type: ignore
with pytest.raises(TypeError, match=r"__call__\(\) takes 2 positional arguments but 3 were given"):
f(a, 3) # type: ignore
with pytest.raises(TypeError, match=r"__call__\(\) got an unexpected keyword argument 'size'"):
f(a, size=3) # type: ignore
f = itemgetter(1, 10)
with pytest.raises(IndexError, match="list index out of range"):
f([])
with pytest.raises(IndexError, match="list index out of range"):
f([1])
with pytest.raises(IndexError, match="string index out of range"):
f([(), a])
class C:
def __getitem__(self, name):
raise SyntaxError
with pytest.raises(SyntaxError, match="None"):
itemgetter(2, 42)([1, (), C()])
f = itemgetter(0, "name")
with pytest.raises(TypeError, match="string( index)? indices must be integers( or slices, not str)?"):
f([a])
with pytest.raises(
TypeError,
match=r"__init__\(\) missing 2 required positional arguments: 'idx' and 'item'",
):
itemgetter() # type: ignore
with pytest.raises(TypeError, match=r"__init__\(\) missing 1 required positional argument: 'item'"):
itemgetter(1) # type: ignore
with pytest.raises(TypeError, match=r"__init__\(\) missing 1 required positional argument: 'item'"):
itemgetter("abc") # type: ignore
with pytest.raises(TypeError, match="'idx' must be an integer"):
itemgetter("abc", 2) # type: ignore
d = dict(key="val")
f = itemgetter(1, "key")
assert f([{}, d]) == "val"
f = itemgetter(1, "nonkey")
with pytest.raises(KeyError, match="nonkey"):
f([{}, d])
inventory = [("apple", 3), ("pear", 5), ("banana", 2), ("orange", 1)]
getcount = itemgetter(0, 1)
assert list(map(getcount, inventory)) == ['p', 'e', 'a', 'r']
assert sorted(inventory, key=getcount) == [("banana", 2), ("pear", 5), ("apple", 3), ("orange", 1)]
# interesting indices
t = tuple("abcde")
assert itemgetter(-1, -1)([1, 2, t]) == 'e'
assert itemgetter(1, slice(2, 4))([1, t]) == ('c', 'd')
# interesting sequences
class T(tuple):
"""
Tuple subclass
"""
assert itemgetter(2, 0)([T("abc"), T("def"), T("ghi")]) == 'g'
assert itemgetter(2, 0)([range(100, 200), range(200, 300), range(300, 400)]) == 300
@pytest.mark.parametrize("proto", range(pickle.HIGHEST_PROTOCOL + 1))
def test_pickle(self, proto: int):
a = "ABCDE"
f = itemgetter(0, 2)
f2 = copy(f, proto)
assert repr(f2) == repr(f)
assert f2([a]) == f([a])
def test_repr(self):
assert repr(itemgetter(0, 1)) == "domdf_python_tools.getters.itemgetter(idx=0, item=1)"
assert repr(itemgetter(1, 2)) == "domdf_python_tools.getters.itemgetter(idx=1, item=2)"
evaluate(repr(itemgetter(0, 1)))
evaluate(repr(itemgetter(1, 2)))
class TestMethodcaller:
def test_methodcaller(self):
with pytest.raises(
TypeError,
match=r"__init__\(\) missing 2 required positional arguments: '_idx' and '_name'",
):
methodcaller() # type: ignore
with pytest.raises(TypeError, match=r"__init__\(\) missing 1 required positional argument: '_name'"):
methodcaller(12) # type: ignore
with pytest.raises(TypeError, match=r"__init__\(\) missing 1 required positional argument: '_name'"):
methodcaller("name") # type: ignore
with pytest.raises(TypeError, match="'_idx' must be an integer"):
methodcaller("name", 12) # type: ignore
with pytest.raises(TypeError, match="method name must be a string"):
methodcaller(0, 12) # type: ignore
f = methodcaller(1, "foo")
with pytest.raises(IndexError, match="list index out of range"):
f([])
with pytest.raises(IndexError, match="list index out of range"):
f([1])
class A:
def foo(self, *args, **kwds):
return args[0] + args[1]
def bar(self, f=42): # noqa: MAN001,MAN002
return f
def baz(*args, **kwds): # noqa: MAN002
return kwds["name"], kwds["self"]
a = A()
f = methodcaller(2, "foo")
with pytest.raises(IndexError, match="tuple index out of range"):
f(["abc", 123, a])
f = methodcaller(1, "foo", 1, 2)
assert f([1, a]) == 3
with pytest.raises(TypeError, match=r"__call__\(\) missing 1 required positional argument: 'obj'"):
f() # type: ignore
with pytest.raises(TypeError, match=r"__call__\(\) takes 2 positional arguments but 3 were given"):
f(a, 3) # type: ignore
with pytest.raises(TypeError, match=r"__call__\(\) got an unexpected keyword argument 'spam'"):
f(a, spam=3) # type: ignore
f = methodcaller(0, "bar")
assert f([a]) == 42
with pytest.raises(TypeError, match=r"__call__\(\) takes 2 positional arguments but 3 were given"):
f([a], [a]) # type: ignore
f = methodcaller(0, "bar", f=5)
assert f([a]) == 5
f = methodcaller(0, "baz", name="spam", self="eggs")
assert f([a]) == ("spam", "eggs")
@pytest.mark.parametrize("proto", range(pickle.HIGHEST_PROTOCOL + 1))
def test_pickle(self, proto: int):
class A:
def foo(self, *args, **kwds):
return args[0] + args[1]
def bar(self, f=42):
return f
def baz(*args, **kwds):
return kwds["name"], kwds["self"]
a = A()
f = methodcaller(0, "bar")
f2 = copy(f, proto)
assert repr(f2) == repr(f)
assert f2([a]) == f([a])
# positional args
f = methodcaller(0, "foo", 1, 2)
f2 = copy(f, proto)
assert repr(f2) == repr(f)
assert f2([a]) == f([a])
# keyword args
f = methodcaller(0, "bar", f=5)
f2 = copy(f, proto)
assert repr(f2) == repr(f)
assert f2([a]) == f([a])
f = methodcaller(0, "baz", self="eggs", name="spam")
f2 = copy(f, proto)
# Can't test repr consistently with multiple keyword args
assert f2([a]) == f([a])
def test_repr(self):
assert repr(methodcaller(0, "lower")) == "domdf_python_tools.getters.methodcaller(0, 'lower')"
assert repr(methodcaller(1, "__iter__")) == "domdf_python_tools.getters.methodcaller(1, '__iter__')"
assert repr(
methodcaller(1, "__iter__", "arg1")
) == "domdf_python_tools.getters.methodcaller(1, '__iter__', 'arg1')"
assert repr(
methodcaller(1, "__iter__", kw1="kwarg1")
) == "domdf_python_tools.getters.methodcaller(1, '__iter__', kw1='kwarg1')"
assert repr(
methodcaller(1, "__iter__", "arg1", "arg2", kw1="kwarg1", kw2="kwarg2")
) == "domdf_python_tools.getters.methodcaller(1, '__iter__', 'arg1', 'arg2', kw1='kwarg1', kw2='kwarg2')"
evaluate(repr(methodcaller(0, "lower")))
evaluate(repr(methodcaller(1, "__iter__")))
evaluate(repr(methodcaller(1, "__iter__", "arg1")))
evaluate(repr(methodcaller(1, "__iter__", kw1="kwarg1")))
evaluate(repr(methodcaller(1, "__iter__", "arg1", "arg2", kw1="kwarg1", kw2="kwarg2")))
def copy(obj: Any, proto: int):
pickled = pickle.dumps(obj, proto)
return pickle.loads(pickled) # nosec: B301
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