def test_hello():
hello = Resource('hello', __name__)
name = Resource('name', __name__)
@hello.implement
@impl.implementation
@contextlib.contextmanager
def hello_impl(resource, context):
yield 'Hello'
@name.implement
@impl.implementation
@contextlib.contextmanager
def name_impl(resource, context):
yield 'John'
context = Context()
@context.partial(hello, name=name)
def say(hello, by, name='World'):
return '{hello}, {name}! by {by}'.format(
hello=hello,
name=name,
by=by,
)
assert "Hello, John! by Rose" == say('Rose')
assert "Hello, John! by Amy" == say('Amy')
def test_autowire():
config_dir = Resource('config_dir', __name__)
db_config = Resource('db_config', __name__)
@db_config.implement
@impl.autowired('config_dir', config_dir)
@impl.contextmanager
def db_config_path(config_dir):
yield os.path.join(config_dir, 'database.yml')
dev_context = Context()
prod_context = Context()
@dev_context.provide(config_dir)
@impl.plain
def get_dev_config_dir():
return './config/'
@prod_context.provide(config_dir)
@impl.plain
def get_prod_config_dir():
return '/etc/autowire/'
with dev_context.resolve(db_config) as dev_db_config:
assert os.path.join(get_dev_config_dir(), 'database.yml') == \
dev_db_config
with prod_context.resolve(db_config) as prod_db_config:
assert os.path.join(get_prod_config_dir(), 'database.yml') == \
prod_db_config
def test_shared_autowire():
counter = Resource('counter', __name__)
double = Resource('double', __name__)
@double.implement
@impl.autowired('counter', counter)
@impl.plain
def double_count(counter):
return counter * 2
context = Context()
count = 0
@context.provide(counter)
@shared
@impl.implementation
@contextlib.contextmanager
def increase_and_get_count(resource, context):
nonlocal count
count += 1
yield count
with context.resolve(double) as value:
assert 2 == value
with context.resolve(double) as value:
assert 2 == value
with context.resolve(counter) as value:
assert 2 == value
def test_partial():
context = Context()
foo = Resource('foo', __name__)
bar = Resource('bar', __name__)
foobar = Resource('foobar', __name__)
@foo.implement
@impl.plain
def foo_impl():
return 'foo'
@bar.implement
@impl.plain
def bar_impl():
return 'bar'
@foobar.implement
@impl.autowired('foo', foo)
@impl.autowired('bar', bar)
@impl.partial
def foobar_impl(foo_count, bar_count, *, foo, bar):
return (foo * foo_count) + (bar * bar_count)
with context.resolve(foobar) as f:
assert 'foobarbar' == f(1, 2)
assert 'foofoobarbarbar' == f(2, 3)
def test_not_provided():
empty = Resource('empty', __name__)
context = Context()
with pytest.raises(ResourceNotProvidedError):
with context.resolve(empty):
pass
def test_plain():
hello = Resource('hello', __name__)
@hello.implement
@impl.plain
def get_resource():
return 'Hello'
context = Context()
with context.resolve(hello) as value:
assert 'Hello' == value
def test_implement():
context = Context()
resource = Resource('test', __name__)
@resource.implement
@impl.implementation
@contextlib.contextmanager
def resource_impl(resource, context):
yield 'Test'
with context.resolve(resource) as value:
assert 'Test' == value
def test_plain():
context = Context()
foo = Resource('foo', __name__)
bar = Resource('bar', __name__)
@foo.implement
@impl.plain
def foo_impl():
return 'foo'
@bar.implement
@impl.autowired('foo', foo)
@impl.plain
def bar_impl(foo):
return 'bar-' + foo
with context.resolve(foo) as value:
assert 'foo' == value
with context.resolve(bar) as value:
assert 'bar-foo' == value
def test_resource():
resource = Resource('resource', __name__)
@resource.implement
@impl.implementation
@contextlib.contextmanager
def resource_impl(resource, context):
yield 'Hello'
context = Context()
with context.resolve(resource) as value:
assert 'Hello' == value
def test_partial():
name = Resource('name', __name__)
env = Resource('env', __name__)
context = Context()
@impl.plain
def get_env():
return 'development'
@impl.plain
def get_name():
return 'name'
context.provide(name, get_name)
context.provide(env, get_env)
@context.partial(name, env=env)
def runnable(name, phrase, env):
return "{}, {}-{}!".format(phrase, name, env)
assert 'Hello, name-development!' == runnable("Hello")
def test_contextual():
context = Context()
foo = Resource('foo', __name__)
bar = Resource('bar', __name__)
@foo.implement
@impl.contextual
@contextlib.contextmanager
def foo_impl():
yield 'foo'
@bar.implement
@impl.autowired('foo', foo)
@impl.contextmanager
def bar_impl(foo):
yield 'bar-' + foo
with context.resolve(foo) as value:
assert 'foo' == value
with context.resolve(bar) as value:
assert 'bar-foo' == value
def test_provide():
env = Resource('env', __name__)
parent = Context()
child = Context(parent)
@child.provide(env)
@impl.plain
def get_env():
return 'development'
with pytest.raises(ResourceNotProvidedError):
with parent.resolve(env):
pass
with child.resolve(env) as value:
assert 'development' == value
def test_scope():
level = Resource('level', __name__)
parent = Context()
child = Context(parent)
@parent.provide(level)
@impl.plain
def parent_level():
return 1
@child.provide(level)
@impl.plain
def child_level():
return 2
with parent.resolve(level) as parent_value, \
child.resolve(level) as child_value:
assert 1 == parent_value
assert 2 == child_value
def test_globally_shared():
number = Resource('number', __name__)
context = Context()
counter = 0
@number.implement
@shared(globally=True)
@impl.implementation
@contextlib.contextmanager
def get_next_number(resource, context):
nonlocal counter
counter += 1
yield counter
child = Context(context)
with child.resolve(number) as value1, context.resolve(number) as value2:
assert 1 == value1
assert 1 == value2
def test_shared():
counter = Resource('counter', __name__)
context = Context()
count = 0
@context.provide(counter)
@shared
@impl.implementation
@contextlib.contextmanager
def increase_and_get_count(resource, context):
nonlocal count
count += 1
yield count
with context.resolve(counter) as value:
assert 1 == value
with context.resolve(counter) as value:
assert 1 == value
with context.resolve(counter) as value:
assert 2 == value
def test_globally_shared_failure():
number = Resource('number', __name__)
context = Context()
@resource.create
@shared(globally=True)
@impl.autowired(number)
@impl.plain
def double(number):
return number * 2
child = Context(context)
@child.provide(number)
@impl.plain
def get_one(resource, context):
return 1
with pytest.raises(ResourceNotProvidedError):
with child.resolve(double):
pass
