class TestAddingWhereClauses:
def setup(self):
self.select = Select(['*'])
def test_default_has_no_clauses(self):
assert not self.select._where
def test_patterns_arg_adds_clauses(self):
select = Select([], [(v.x, FOAF.name, v.name)])
for pattern in select._where.patterns:
if isinstance(pattern, (Triple, GraphPattern)):
break
else:
assert False
def test_method_is_generative(self):
select = self.select.where()
assert select is not self.select
def test_method_args_add_clauses(self):
select = self.select.where((v.x, FOAF.name, "Alice"),
(v.x, FOAF.mbox, v.mbox))
assert len(select._where.patterns[-1].patterns) == 2
def test_optional_kwarg_makes_optional_pattern(self):
select = self.select.where((v.x, FOAF.mbox, v.mbox), optional=True)
assert select._where.patterns[-1].optional
class TestAddingWhereClauses:
def setup(self):
self.select = Select(['*'])
def test_default_has_no_clauses(self):
assert not self.select._where
def test_patterns_arg_adds_clauses(self):
select = Select([], [(v.x, FOAF.name, v.name)])
for pattern in select._where.patterns:
if isinstance(pattern, (Triple, GraphPattern)):
break
else:
assert False
def test_method_is_generative(self):
select = self.select.where()
assert select is not self.select
def test_method_args_add_clauses(self):
select = self.select.where(
(v.x, FOAF.name, "Alice"), (v.x, FOAF.mbox, v.mbox)
)
assert len(select._where.patterns[-1].patterns) == 2
def test_optional_kwarg_makes_optional_pattern(self):
select = self.select.where((v.x, FOAF.mbox, v.mbox), optional=True)
assert select._where.patterns[-1].optional
class TestAddingFilterConstraints:
def setup(self):
self.select = Select([])
def test_method_is_generative(self):
select = self.select.filter()
assert select is not self.select
def test_method_args_add_filters(self):
select = self.select.filter(v.x > 1, v.name == "Alice")
assert select._where.filters
class TestAddingFilterConstraints:
def setup(self):
self.select = Select([])
def test_method_is_generative(self):
select = self.select.filter()
assert select is not self.select
def test_method_args_add_filters(self):
select = self.select.filter(v.x > 1, v.name == "Alice")
assert select._where.filters
def test_patterns_arg_adds_clauses(self):
select = Select([], [(v.x, FOAF.name, v.name)])
for pattern in select._where.patterns:
if isinstance(pattern, (Triple, GraphPattern)):
break
else:
assert False
class TestProjectingVariables:
def setup(self):
self.select = Select([])
def test_variables_arg_adds_variables(self):
select = Select([Variable('foo')])
assert Variable('foo') in select.projection
def test_variables_can_be_expressions(self):
select = self.select.project(v.foo)
assert Variable('foo') in select.projection
def test_variables_can_be_rdflib_variables(self):
select = self.select.project(Variable('foo'))
assert Variable('foo') in select.projection
def test_variables_can_be_strings(self):
select = self.select.project('foo')
assert Variable('foo') in select.projection
def test_method_is_generative(self):
select = self.select.project(v.foo)
assert select is not self.select
def test_method_args_replace_projected_variables(self):
select = self.select.project(v.foo, v.bar)
assert Variable('foo') in select.projection
assert Variable('bar') in select.projection
select = self.select.project(v.baz)
assert Variable('baz') in select.projection
assert Variable('foo') not in select.projection
assert Variable('bar') not in select.projection
class TestProjectingVariables:
def setup(self):
self.select = Select([])
def test_variables_arg_adds_variables(self):
select = Select([Variable('foo')])
assert Variable('foo') in select.projection
def test_variables_can_be_expressions(self):
select = self.select.project(v.foo)
assert Variable('foo') in select.projection
def test_variables_can_be_rdflib_variables(self):
select = self.select.project(Variable('foo'))
assert Variable('foo') in select.projection
def test_variables_can_be_strings(self):
select = self.select.project('foo')
assert Variable('foo') in select.projection
def test_method_is_generative(self):
select = self.select.project(v.foo)
assert select is not self.select
def test_method_args_replace_projected_variables(self):
select = self.select.project(v.foo, v.bar)
assert Variable('foo') in select.projection
assert Variable('bar') in select.projection
select = self.select.project(v.baz)
assert Variable('baz') in select.projection
assert Variable('foo') not in select.projection
assert Variable('bar') not in select.projection
def __init__(self,
class_,
type_or_select,
identifier=None,
properties=None):
self.class_ = class_
if identifier is None:
identifier = Variable(class_.__name__)
self.identifier = identifier
if isinstance(type_or_select, Select):
select = type_or_select
else:
rdf_type = type_or_select
select = Select([identifier], [(identifier, is_a, rdf_type)])
if identifier not in select.projection:
raise InvalidRequestError("Select must include identifier.")
self.select = select
self.setup_class(properties or {})
def setup(self):
self.select = Select([])
def setup(self):
self.select = Select(['*'])
def test_variables_arg_adds_variables(self):
select = Select([Variable('foo')])
assert Variable('foo') in select.projection
def test_variables_arg_is_sufficient(self):
try:
select = Select([v.x])
except Exception:
assert False
def setup(self):
self.select = Select([])
def setup(self):
self.select = Select(['*'])
