def test_replace_injections_container_already_started(container_factory,
rabbit_config):
class Service(object):
proxy = rpc_proxy("foo_service")
container = container_factory(Service, rabbit_config)
container.start()
with pytest.raises(RuntimeError):
replace_injections(container, "proxy")
def test_replace_injections_container_already_started(container_factory,
rabbit_config):
class Service(object):
proxy = rpc_proxy("foo_service")
container = container_factory(Service, rabbit_config)
container.start()
with pytest.raises(RuntimeError):
replace_injections(container, "proxy")
def test_replace_non_injection(container_factory, rabbit_config):
class Service(object):
proxy = rpc_proxy("foo_service")
@rpc
def method(self):
pass
container = container_factory(Service, rabbit_config)
# error if dependency doesn't exit
with pytest.raises(DependencyNotFound):
replace_injections(container, "nonexist")
# error if dependency is not an injection
with pytest.raises(DependencyNotFound):
replace_injections(container, "method")
def test_shop_checkout_integration(runner_factory, rpc_proxy_factory):
""" Simulate a checkout flow as an integration test.
Requires instances of AcmeShopService, StockService and InvoiceService
to be running. Explicitly replaces the rpc proxy to PaymentService so
that service doesn't need to be hosted.
Also replaces the event dispatcher injection on AcmeShopService and
disables the timer entrypoint on StockService. Limiting the interactions
of services in this way reduces the scope of the integration test and
eliminates undesirable side-effects (e.g. processing events unnecessarily).
"""
context_data = {'user_id': 'wile_e_coyote'}
shop = rpc_proxy_factory('acmeshopservice', context_data=context_data)
runner = runner_factory(AcmeShopService, StockService, InvoiceService)
# replace ``event_dispatcher`` and ``payment_service`` injections on
# AcmeShopService with Mock injections
shop_container = get_container(runner, AcmeShopService)
fire_event, payment_service = replace_injections(
shop_container, "fire_event", "payment_service")
# restrict entrypoints on StockService
stock_container = get_container(runner, StockService)
restrict_entrypoints(stock_container, "check_price", "check_stock")
runner.start()
# add some items to the basket
assert shop.add_to_basket("anvil") == "anvil"
assert shop.add_to_basket("invisible_paint") == "invisible_paint"
# try to buy something that's out of stock
with pytest.raises(RemoteError) as exc_info:
shop.add_to_basket("toothpicks")
assert exc_info.value.exc_type == "ItemOutOfStock"
# provide a mock response from the payment service
payment_service.take_payment.return_value = "Payment complete."
# checkout
res = shop.checkout()
total_amount = 100 + 10
assert res == total_amount
# verify integration with mocked out payment service
payment_service.take_payment.assert_called_once_with({
'customer': "wile_e_coyote",
'address': "12 Long Road, High Cliffs, Utah",
'amount': total_amount,
'message': "Dear Wile E Coyote. Please pay $110 to ACME Corp."
})
# verify events fired as expected
assert fire_event.call_count == 3
def test_replace_non_injection(container_factory, rabbit_config):
class Service(object):
proxy = rpc_proxy("foo_service")
@rpc
def method(self):
pass
container = container_factory(Service, rabbit_config)
# error if dependency doesn't exit
with pytest.raises(DependencyNotFound):
replace_injections(container, "nonexist")
# error if dependency is not an injection
with pytest.raises(DependencyNotFound):
replace_injections(container, "method")
def test_replace_injections(container_factory, rabbit_config):
class Service(object):
foo_proxy = rpc_proxy("foo_service")
bar_proxy = rpc_proxy("bar_service")
baz_proxy = rpc_proxy("baz_service")
@rpc
def method(self, arg):
self.foo_proxy.remote_method(arg)
@rpc
def foo(self):
return "bar"
container = container_factory(Service, rabbit_config)
# replace a single injection
foo_proxy = replace_injections(container, "foo_proxy")
# replace multiple injections
replacements = replace_injections(container, "bar_proxy", "baz_proxy")
assert len([x for x in replacements]) == 2
# verify that container.dependencies doesn't include an rpc_proxy anymore
assert all([
not isinstance(dependency, rpc_proxy.provider_cls)
for dependency in container.dependencies
])
container.start()
# verify that the mock injection collects calls
msg = "msg"
with RpcProxy("service", rabbit_config) as service_proxy:
service_proxy.method(msg)
foo_proxy.remote_method.assert_called_once_with(msg)
def test_replace_injections(container_factory, rabbit_config):
class Service(object):
foo_proxy = rpc_proxy("foo_service")
bar_proxy = rpc_proxy("bar_service")
baz_proxy = rpc_proxy("baz_service")
@rpc
def method(self, arg):
self.foo_proxy.remote_method(arg)
@rpc
def foo(self):
return "bar"
container = container_factory(Service, rabbit_config)
# replace a single injection
foo_proxy = replace_injections(container, "foo_proxy")
# replace multiple injections
replacements = replace_injections(container, "bar_proxy", "baz_proxy")
assert len([x for x in replacements]) == 2
# verify that container.dependencies doesn't include an rpc_proxy anymore
assert all([not isinstance(dependency, rpc_proxy.provider_cls)
for dependency in container.dependencies])
container.start()
# verify that the mock injection collects calls
msg = "msg"
with RpcProxy("service", rabbit_config) as service_proxy:
service_proxy.method(msg)
foo_proxy.remote_method.assert_called_once_with(msg)
def test_shop_checkout_integration(runner_factory, rpc_proxy_factory):
""" Simulate a checkout flow as an integration test.
Requires instances of AcmeShopService, StockService and InvoiceService
to be running. Explicitly replaces the rpc proxy to PaymentService so
that service doesn't need to be hosted.
Also replaces the event dispatcher injection on AcmeShopService and
disables the timer entrypoint on StockService. Limiting the interactions
of services in this way reduces the scope of the integration test and
eliminates undesirable side-effects (e.g. processing events unnecessarily).
"""
context_data = {'user_id': 'wile_e_coyote'}
shop = rpc_proxy_factory('acmeshopservice', context_data=context_data)
runner = runner_factory(AcmeShopService, StockService, InvoiceService)
# replace ``event_dispatcher`` and ``payment_service`` injections on
# AcmeShopService with Mock injections
shop_container = get_container(runner, AcmeShopService)
fire_event, payment_service = replace_injections(shop_container,
"fire_event",
"payment_service")
# restrict entrypoints on StockService
stock_container = get_container(runner, StockService)
restrict_entrypoints(stock_container, "check_price", "check_stock")
runner.start()
# add some items to the basket
assert shop.add_to_basket("anvil") == "anvil"
assert shop.add_to_basket("invisible_paint") == "invisible_paint"
# try to buy something that's out of stock
with pytest.raises(RemoteError) as exc_info:
shop.add_to_basket("toothpicks")
assert exc_info.value.exc_type == "ItemOutOfStock"
# provide a mock response from the payment service
payment_service.take_payment.return_value = "Payment complete."
# checkout
res = shop.checkout()
total_amount = 100 + 10
assert res == total_amount
# verify integration with mocked out payment service
payment_service.take_payment.assert_called_once_with({
'customer':
"wile_e_coyote",
'address':
"12 Long Road, High Cliffs, Utah",
'amount':
total_amount,
'message':
"Dear Wile E Coyote. Please pay $110 to ACME Corp."
})
# verify events fired as expected
assert fire_event.call_count == 3