def test_optional_field():
expr = check_expr(if_some([S.x, S.peen], S.x.copies, 0))
if_some_bind = expr.values[1]
assert isinstance(if_some_bind, List)
x = if_some_bind.values[0]
assert isinstance(x, Symbol)
peen_ref = NamedRef(None, 'peen', Optional[Record[{'copies': Integer}]])
check_ref(x, Ref(peen_ref, Record[{'copies': Integer}]))
def test_optional_link():
expr = check_expr(if_some([S.x, S.rakyats], S.x.pinout, ''))
if_some_bind = expr.values[1]
assert isinstance(if_some_bind, List)
x = if_some_bind.values[0]
assert isinstance(x, Symbol)
rakyats_ref = NamedRef(None, 'rakyats', Optional[TypeRef['thalweg']])
check_ref(x, Ref(rakyats_ref, TypeRef['thalweg']))
def test_optional_link():
expr = check_expr(if_some([S.x, S.rakyats], S.x.pinout, ''))
if_some_bind = expr.values[1]
assert isinstance(if_some_bind, List)
x = if_some_bind.values[0]
assert isinstance(x, Symbol)
rakyats_ref = NamedRef(None, 'rakyats', Optional[TypeRef['thalweg']])
check_ref(x, Ref(rakyats_ref, TypeRef['thalweg']))
def test_optional_field():
expr = check_expr(if_some([S.x, S.peen], S.x.copies, 0))
if_some_bind = expr.values[1]
assert isinstance(if_some_bind, List)
x = if_some_bind.values[0]
assert isinstance(x, Symbol)
peen_ref = NamedRef(None, 'peen', Optional[Record[{'copies': Integer}]])
check_ref(x, Ref(peen_ref, Record[{'copies': Integer}]))
def test_if_some_optional():
types = {
'Bar': Record[{
'baz': Integer
}],
'Foo': Record[{
'bar': Sequence['Bar']
}],
'__root__': Record[{
'foo': Optional['Foo']
}],
}
ast = check_expr(types,
if_some([S.x, S.foo], each(S.y, S.x.bar, S.y.baz), None))
_, _, each_ast, _ = ast.values
_, _, _, y_baz = each_ast.values
check_ref(y_baz, [
('baz', Integer),
(None, TypeRef['Bar']),
('bar', Sequence[TypeRef['Bar']]),
(None, TypeRef['Foo']),
('foo', Optional[TypeRef['Foo']]),
])
@define(Record[{'id': Integer, 'name': String}])
def image_url(image):
return 'http://example.com/{id}-{name}'.format(id=image['id'],
name=image['name'])
character_sg = SubGraph(_GRAPH, 'Character')
GRAPH = Graph([
Node('Character', [
Field('id', None, character_sg),
Field('name', None, character_sg),
Field(
'image-url', None,
character_sg.c(
if_some([S.img, S.this.image], image_url(S.img),
'http://example.com/no-photo.jpg'), )),
]),
Root([
Link('characters',
Sequence[TypeRef['Character']],
to_characters_query,
requires=None),
]),
])
# test high-level graph
def test_high_level():
result = execute(GRAPH, '[{:characters [:name :image-url]}]')
assert result == {
def test_query_if_some():
check_query(
if_some([S.x, S.civics], S.x.clacks, 'false'),
Node([Link('civics', Node([Field('clacks')]))]),
)
def testIfSomeExpr(self):
self.assertCompiles(
if_some([S.x, S.nitrox], S.x, 'nothing'),
"next(((x if (x is not None) else 'nothing') for x in "
"(ctx['nitrox'],)))"
)
def test_query_optional():
check_query(
if_some([S.x, S.civics], S.x.clacks, 'false'),
Node([Link('civics', Node([Field('clacks')]))]),
)
def test_if_some_expr():
check_compiles(
if_some([S.x, S.nitrox], S.x, 'nothing'),
"next(x if x is not None else 'nothing' for x in (ctx['nitrox'],)) ")