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import sre_constants
import pytest
from snakeoil import demandload
# few notes:
# all tests need to be wrapped w/ the following decorator; it
# ensures that snakeoils env-aware disabling is reversed, ensuring the
# setup is what the test expects.
# it also explicitly resets the state on the way out.
def reset_globals(functor):
def f(*args, **kwds):
orig_demandload = demandload.demandload
orig_demand_compile = demandload.demand_compile_regexp
orig_protection = demandload._protection_enabled
orig_noisy = demandload._noisy_protection
try:
return functor(*args, **kwds)
finally:
demandload.demandload = orig_demandload
demandload.demand_compile_regexp = orig_demand_compile
demandload._protection_enabled = orig_protection
demandload._noisy_protection = orig_noisy
return f
class TestParser:
@reset_globals
def test_parse(self):
for input, output in [
("foo", [("foo", "foo")]),
("foo:bar", [("foo.bar", "bar")]),
("foo:bar,baz@spork", [("foo.bar", "bar"), ("foo.baz", "spork")]),
("foo@bar", [("foo", "bar")]),
("foo_bar", [("foo_bar", "foo_bar")]),
]:
assert output == list(demandload.parse_imports([input]))
pytest.raises(ValueError, list, demandload.parse_imports(["a.b"]))
pytest.raises(ValueError, list, demandload.parse_imports(["a:,"]))
pytest.raises(ValueError, list, demandload.parse_imports(["a:b,x@"]))
pytest.raises(ValueError, list, demandload.parse_imports(["b-x"]))
pytest.raises(ValueError, list, demandload.parse_imports([" b_x"]))
class TestPlaceholder:
@reset_globals
def test_getattr(self):
scope = {}
placeholder = demandload.Placeholder(scope, "foo", list)
assert scope == object.__getattribute__(placeholder, "_scope")
assert placeholder.__doc__ == [].__doc__
assert scope["foo"] == []
demandload._protection_enabled = lambda: True
with pytest.raises(ValueError):
getattr(placeholder, "__doc__")
@reset_globals
def test__str__(self):
scope = {}
placeholder = demandload.Placeholder(scope, "foo", list)
assert scope == object.__getattribute__(placeholder, "_scope")
assert str(placeholder) == str([])
assert scope["foo"] == []
@reset_globals
def test_call(self):
def passthrough(*args, **kwargs):
return args, kwargs
def get_func():
return passthrough
scope = {}
placeholder = demandload.Placeholder(scope, "foo", get_func)
assert scope == object.__getattribute__(placeholder, "_scope")
assert (("arg",), {"kwarg": 42}) == placeholder("arg", kwarg=42)
assert passthrough is scope["foo"]
@reset_globals
def test_setattr(self):
class Struct:
pass
scope = {}
placeholder = demandload.Placeholder(scope, "foo", Struct)
placeholder.val = 7
demandload._protection_enabled = lambda: True
with pytest.raises(ValueError):
getattr(placeholder, "val")
assert 7 == scope["foo"].val
class TestImport:
@reset_globals
def test_demandload(self):
scope = {}
demandload.demandload("snakeoil:demandload", scope=scope)
assert demandload is not scope["demandload"]
assert demandload.demandload is scope["demandload"].demandload
assert demandload is scope["demandload"]
@reset_globals
def test_disabled_demandload(self):
scope = {}
demandload.disabled_demandload("snakeoil:demandload", scope=scope)
assert demandload is scope["demandload"]
class TestDemandCompileRegexp:
@reset_globals
def test_demand_compile_regexp(self):
scope = {}
demandload.demand_compile_regexp("foo", "frob", scope=scope)
assert list(scope.keys()) == ["foo"]
assert "frob" == scope["foo"].pattern
assert "frob" == scope["foo"].pattern
# verify it's delayed via a bad regex.
demandload.demand_compile_regexp("foo", "f(", scope=scope)
assert list(scope.keys()) == ["foo"]
# should blow up on accessing an attribute.
obj = scope["foo"]
with pytest.raises(sre_constants.error):
getattr(obj, "pattern")
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