def test_bind_and_resolve():
"""
Binding a function allows it be resolved.
"""
registry = Registry()
registry.bind("foo", create_foo)
factory = registry.resolve("foo")
assert_that(factory, is_(equal_to(create_foo)))
def test_bind_and_resolve():
"""
Binding a function allows it be resolved.
"""
registry = Registry()
registry.bind("foo", create_foo)
factory = registry.resolve("foo")
assert_that(factory, is_(equal_to(create_foo)))
def test_bind_duplicate():
"""
Binding to the same key multiple times raises an error.
"""
registry = Registry()
registry.bind("foo", create_foo)
assert_that(
calling(registry.bind).with_args("foo", create_bar),
raises(AlreadyBoundError),
)
def test_bind_duplicate():
"""
Binding to the same key multiple times raises an error.
"""
registry = Registry()
registry.bind("foo", create_foo)
assert_that(
calling(registry.bind).with_args("foo", create_bar),
raises(AlreadyBoundError),
)
def test_object_graph_partial_use():
"""
Partial initialization succeeds partially and is recoverable.
"""
registry = Registry()
create_first = Mock()
create_first.return_value = "first"
create_second = Mock()
create_second.side_effect = [Exception, "second"]
create_third = Mock()
create_third.side_effect = "third"
registry.bind("first", create_first)
registry.bind("second", create_second)
registry.bind("third", create_third)
graph = create_object_graph("test", registry=registry)
# exception raised from initial call to create_second
assert_that(
calling(graph.use).with_args("first", "second", "third"),
raises(Exception))
# first and second were called, but not third
assert_that(create_first.call_count, is_(equal_to(1)))
assert_that(create_second.call_count, is_(equal_to(1)))
assert_that(create_third.call_count, is_(equal_to(0)))
# second call succeeds
[first, second, third] = graph.use("first", "second", "third")
# first was not called, second was called again, and third called for the first time
assert_that(create_first.call_count, is_(equal_to(1)))
assert_that(create_second.call_count, is_(equal_to(2)))
assert_that(create_third.call_count, is_(equal_to(1)))
def test_object_graph_partial_use():
"""
Partial initialization succeeds partially and is recoverable.
"""
registry = Registry()
create_first = Mock()
create_first.return_value = "first"
create_second = Mock()
create_second.side_effect = [Exception, "second"]
create_third = Mock()
create_third.side_effect = "third"
registry.bind("first", create_first)
registry.bind("second", create_second)
registry.bind("third", create_third)
graph = create_object_graph("test", registry=registry)
# exception raised from initial call to create_second
assert_that(calling(graph.use).with_args("first", "second", "third"), raises(Exception))
# first and second were called, but not third
assert_that(create_first.call_count, is_(equal_to(1)))
assert_that(create_second.call_count, is_(equal_to(1)))
assert_that(create_third.call_count, is_(equal_to(0)))
# second call succeeds
[first, second, third] = graph.use("first", "second", "third")
# first was not called, second was called again, and third called for the first time
assert_that(create_first.call_count, is_(equal_to(1)))
assert_that(create_second.call_count, is_(equal_to(2)))
assert_that(create_third.call_count, is_(equal_to(1)))