class TestSane(Topology):
config = {
"topology.wide.config.1": "value",
"spout.overriden.config": True
}
spout = HeronComponentSpec(None,
"sp_class",
True,
3,
inputs=None,
outputs=[
"word", "count",
Stream(fields=['error_msg'],
name='error_stream')
],
config={
"spout.specific.config.1": "value",
"spout.specific.config.2": True,
"spout.specific.config.3": -12.4,
"spout.specific.config.4": [1, 2, 3],
"spout.overriden.config": False
})
bolt = HeronComponentSpec(None,
"bl_class",
False,
4,
inputs={
spout: Grouping.SHUFFLE,
spout['error_stream']: Grouping.ALL
})
def test_class_dict_to_specs(self):
# duplicate component name
class_dict = {
"spout": HeronComponentSpec("same_name", "sp_cls", True, 1),
"bolt": HeronComponentSpec("same_name", "bl_cls", False, 2)
}
with self.assertRaises(ValueError):
TopologyType.class_dict_to_specs(class_dict)
def test_get_item(self):
# HeronComponentSpec name set
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = [
"string", "hello",
Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")
]
ret = spec['another_stream']
self.assertEqual(ret, GlobalStreamId("spout", "another_stream"))
# HeronComponentSpec name not set
spec = HeronComponentSpec(None, "class", True, 1)
spec.outputs = [
"string", "hello",
Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")
]
ret = spec['default']
self.assertEqual(ret, GlobalStreamId(spec, "default"))
# stream id not registered
spec = HeronComponentSpec(None, "class", True, 1)
spec.outputs = [
"string", "hello",
Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")
]
with self.assertRaises(ValueError):
spec['non_existent_stream']
def test_component_id_property(self):
# component id is string
gsi = GlobalStreamId(componentId="component", streamId="stream")
self.assertEqual(gsi.component_id, "component")
# component id is HeronComponentSpec with name
spec = HeronComponentSpec("spout", "class", True, 1)
gsi = GlobalStreamId(spec, "stream")
self.assertEqual(gsi.component_id, "spout")
# component id is HeronComponentSpec without name
spec = HeronComponentSpec(None, "class", True, 1)
gsi = GlobalStreamId(spec, "stream")
# expecting "<No name available for HeronComponentSpec yet, uuid: %s>"
self.assertIn(spec.uuid, gsi.component_id)
def spec(cls,
name=None,
inputs=None,
par=1,
config=None,
optional_outputs=None):
"""Register this bolt to the topology and create ``HeronComponentSpec``
This method takes an optional ``outputs`` argument for supporting dynamic output fields
declaration. However, it is recommended that ``outputs`` should be declared as
an attribute of your ``Bolt`` subclass. Also, some ways of declaring inputs is not supported
in this implementation; please read the documentation below.
:type name: str
:param name: Name of this bolt.
:type inputs: dict or list
:param inputs: Streams that feed into this Bolt.
Two forms of this are acceptable:
1. A `dict` mapping from ``HeronComponentSpec`` to ``Grouping``.
In this case, default stream is used.
2. A `dict` mapping from ``GlobalStreamId`` to ``Grouping``.
This ``GlobalStreamId`` object itself is different from StreamParse, because
Heron does not use thrift, although its constructor method is compatible.
3. A `list` of ``HeronComponentSpec``. In this case, default stream with
SHUFFLE grouping is used.
4. A `list` of ``GlobalStreamId``. In this case, SHUFFLE grouping is used.
:type par: int
:param par: Parallelism hint for this spout.
:type config: dict
:param config: Component-specific config settings.
:type optional_outputs: list of (str or Stream) or tuple of (str or Stream)
:param optional_outputs: Additional output fields for this bolt. These fields are added to
existing ``outputs`` class attributes of your bolt. This is an optional
argument, and exists only for supporting dynamic output field
declaration.
"""
python_class_path = f"{cls.__module__}.{cls.__name__}"
if hasattr(cls, 'outputs'):
# avoid modification to cls.outputs
_outputs = copy.copy(cls.outputs)
else:
_outputs = []
if optional_outputs is not None:
assert isinstance(optional_outputs, (list, tuple))
for out in optional_outputs:
assert isinstance(out, (str, Stream))
_outputs.append(out)
return HeronComponentSpec(name,
python_class_path,
is_spout=False,
par=par,
inputs=inputs,
outputs=_outputs,
config=config)
def test_add_spec(self):
builder = TopologyBuilder("Test")
with self.assertRaises(ValueError):
builder.add_spec(HeronComponentSpec(None, "path", True, 1))
with self.assertRaises(TypeError):
builder.add_spec(None)
self.assertEqual(len(builder._specs), 0)
# add 10 specs
specs = []
for i in range(10):
specs.append(HeronComponentSpec(str(i), "path", True, 1))
builder.add_spec(*specs)
self.assertEqual(len(builder._specs), 10)
def spec(cls, name, par, inputs, config, user_bolt_classpath, user_output_fields=None):
python_class_path = "%s.%s" % (cls.__module__, cls.__name__)
config[integ_const.USER_BOLT_CLASSPATH] = user_bolt_classpath
# avoid modification to cls.outputs
_outputs = copy.copy(cls.outputs)
if user_output_fields is not None:
_outputs.extend(user_output_fields)
return HeronComponentSpec(name, python_class_path, is_spout=False, par=par,
inputs=inputs, outputs=_outputs, config=config)
def spec(cls, name, par, config, user_spout_classpath, user_output_fields=None):
python_class_path = f"{cls.__module__}.{cls.__name__}"
config[integ_const.USER_SPOUT_CLASSPATH] = user_spout_classpath
# avoid modification to cls.outputs
_outputs = copy.copy(cls.outputs)
if user_output_fields is not None:
_outputs.extend(user_output_fields)
return HeronComponentSpec(name, python_class_path, is_spout=True, par=par,
inputs=None, outputs=_outputs, config=config)
def test_get_out_streamids(self):
# outputs is none
spec = HeronComponentSpec("spout", "class", True, 1)
ret = spec.get_out_streamids()
self.assertEqual(ret, set())
# outputs neither list nor tuple
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = "string"
with self.assertRaises(TypeError):
spec.get_out_streamids()
# outputs sane
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = ["string", "hello", Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")]
ret = spec.get_out_streamids()
self.assertEqual(ret, {"default", "another_stream"})
def spec(cls, name=None, par=1, config=None, optional_outputs=None):
"""Register this spout to the topology and create ``HeronComponentSpec``
The usage of this method is compatible with StreamParse API, although it does not create
``ShellBoltSpec`` but instead directly registers to a ``Topology`` class.
This method takes an optional ``outputs`` argument for supporting dynamic output fields
declaration. However, it is recommended that ``outputs`` should be declared as
an attribute of your ``Spout`` subclass. Also, some ways of declaring inputs is not supported
in this implementation; please read the documentation below.
:type name: str
:param name: Name of this spout.
:type par: int
:param par: Parallelism hint for this spout.
:type config: dict
:param config: Component-specific config settings.
:type optional_outputs: list of (str or Stream) or tuple of (str or Stream)
:param optional_outputs: Additional output fields for this spout. These fields are added to
existing ``outputs`` class attributes of your spout.
This is an optional argument, and exists only for supporting dynamic
output field declaration.
"""
python_class_path = f"{cls.__module__}.{cls.__name__}"
if hasattr(cls, 'outputs'):
# avoid modification to cls.outputs
_outputs = copy.copy(cls.outputs)
else:
_outputs = []
if optional_outputs is not None:
assert isinstance(optional_outputs, (list, tuple))
for out in optional_outputs:
assert isinstance(out, (str, Stream))
_outputs.append(out)
return HeronComponentSpec(name,
python_class_path,
is_spout=True,
par=par,
inputs=None,
outputs=_outputs,
config=config)
def test_get_item(self):
# HeronComponentSpec name set
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = ["string", "hello", Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")]
ret = spec['another_stream']
self.assertEqual(ret, GlobalStreamId("spout", "another_stream"))
# HeronComponentSpec name not set
spec = HeronComponentSpec(None, "class", True, 1)
spec.outputs = ["string", "hello", Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")]
ret = spec['default']
self.assertEqual(ret, GlobalStreamId(spec, "default"))
# stream id not registered
spec = HeronComponentSpec(None, "class", True, 1)
spec.outputs = ["string", "hello", Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")]
with self.assertRaises(ValueError):
spec['non_existent_stream']
def test_sanitize_inputs(self):
# Note that _sanitize_inputs() should only be called after HeronComponentSpec's
# name attribute is set
# invalid inputs given as argument (valid ones are either dict, list, tuple or None)
invalid_spec = HeronComponentSpec("name", "classpath", True, 1, inputs="string")
with self.assertRaises(TypeError):
invalid_spec._sanitize_inputs()
invalid_spec = HeronComponentSpec("name", "classpath", True, 1, inputs=100)
with self.assertRaises(TypeError):
invalid_spec._sanitize_inputs()
# dict <HeronComponentSpec -> Grouping>
from_spec = HeronComponentSpec("spout", "sp_clspath", True, 1)
to_spec = HeronComponentSpec("bolt", "bl_clspath", False, 1,
inputs={from_spec: Grouping.SHUFFLE})
ret = to_spec._sanitize_inputs()
self.assertEqual(ret, {GlobalStreamId("spout", "default"): Grouping.SHUFFLE})
from_spec = HeronComponentSpec("spout", "sp_clspath", True, 1)
from_spec.outputs = [Stream(name='another_stream')]
to_spec = HeronComponentSpec("bolt", "bl_clspath", False, 1,
inputs={from_spec['another_stream']: Grouping.ALL})
ret = to_spec._sanitize_inputs()
self.assertEqual(ret, {GlobalStreamId("spout", "another_stream"): Grouping.ALL})
# HeronComponentSpec's name attribute not set
from_spec = HeronComponentSpec(None, "sp_clspath", True, 1)
to_spec = HeronComponentSpec("bolt", "bl_clspath", False, 1,
inputs={from_spec: Grouping.ALL})
with self.assertRaises(RuntimeError):
to_spec._sanitize_inputs()
# dict <GlobalStreamId -> Grouping>
inputs_dict = {GlobalStreamId("some_spout", "some_stream"): Grouping.NONE,
GlobalStreamId("another_spout", "default"): Grouping.fields(['word', 'count'])}
spec = HeronComponentSpec("bolt", "classpath", False, 1, inputs=inputs_dict)
ret = spec._sanitize_inputs()
self.assertEqual(ret, inputs_dict)
# list of HeronComponentSpec
from_spec1 = HeronComponentSpec("spout1", "sp1_cls", True, 1)
from_spec2 = HeronComponentSpec("spout2", "sp2_cls", True, 1)
to_spec = HeronComponentSpec("bolt", "bl_cls", False, 1, inputs=[from_spec1, from_spec2])
ret = to_spec._sanitize_inputs()
self.assertEqual(ret, {GlobalStreamId("spout1", "default"): Grouping.SHUFFLE,
GlobalStreamId("spout2", "default"): Grouping.SHUFFLE})
# HeronComponentSpec's name attribute not set
from_spec = HeronComponentSpec(None, "sp_clspath", True, 1)
to_spec = HeronComponentSpec("bolt", "bl_clspath", False, 1, inputs=[from_spec])
with self.assertRaises(RuntimeError):
to_spec._sanitize_inputs()
# list of GlobalStreamId
inputs_list = [GlobalStreamId("spout1", "default"), GlobalStreamId("spout2", "some_stream")]
spec = HeronComponentSpec("bolt", "bl_cls", False, 1, inputs=inputs_list)
ret = spec._sanitize_inputs()
self.assertEqual(ret, dict(zip(inputs_list, [Grouping.SHUFFLE] * 2)))
# list of neither GlobalStreamId nor HeronComponentSpec
inputs_list = [None, 123, "string", [GlobalStreamId("sp", "default")]]
spec = HeronComponentSpec("bolt", "bl_cls", False, 1, inputs=inputs_list)
with self.assertRaises(ValueError):
spec._sanitize_inputs()
def test_get_out_streamids(self):
# outputs is none
spec = HeronComponentSpec("spout", "class", True, 1)
ret = spec.get_out_streamids()
self.assertEqual(ret, set())
# outputs neither list nor tuple
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = "string"
with self.assertRaises(TypeError):
spec.get_out_streamids()
# outputs sane
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = [
"string", "hello",
Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")
]
ret = spec.get_out_streamids()
self.assertEqual(ret, {"default", "another_stream"})
def test_sanitize_args(self):
# good args
spec = HeronComponentSpec(name="string",
python_class_path="string.path",
is_spout=True,
par=1)
self.assertIsNotNone(spec)
name_none_spec = HeronComponentSpec(name=None,
python_class_path="string.path",
is_spout=True,
par=1)
self.assertIsNotNone(name_none_spec)
# bad name
with self.assertRaises(AssertionError):
HeronComponentSpec(123, "classpath", True, 1)
with self.assertRaises(AssertionError):
HeronComponentSpec(False, "classpath", True, 1)
# bad classpath
with self.assertRaises(AssertionError):
HeronComponentSpec("name", {}, True, 1)
with self.assertRaises(AssertionError):
HeronComponentSpec("name", None, True, 1)
# bad is_spout
with self.assertRaises(AssertionError):
HeronComponentSpec("name", "classpath", 1, 1)
with self.assertRaises(AssertionError):
HeronComponentSpec("name", "classpath", None, 1)
# bad par
with self.assertRaises(AssertionError):
HeronComponentSpec("name", "classpath", True, "1")
with self.assertRaises(AssertionError):
HeronComponentSpec("name", "classpath", True, 1.35)
with self.assertRaises(AssertionError):
HeronComponentSpec("name", "classpath", True, -21)
with self.assertRaises(AssertionError):
HeronComponentSpec("name", "classpath", True, None)
def test_sanitize_outputs(self):
# outputs is None (no argument to outputs)
spec = HeronComponentSpec("spout", "class", True, 1)
ret = spec._sanitize_outputs()
self.assertIsNone(ret)
# outputs neither list nor tuple
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = "string"
with self.assertRaises(TypeError):
spec._sanitize_outputs()
# output list contains a non-string and non-Stream object
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = ["string", False, 123]
with self.assertRaises(TypeError):
spec._sanitize_outputs()
# output list is all string
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = ["string", "hello", "heron"]
ret = spec._sanitize_outputs()
self.assertEqual(ret, {"default": ["string", "hello", "heron"]})
# output list has mixed stream
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = [
"string", "hello",
Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")
]
ret = spec._sanitize_outputs()
self.assertEqual(
ret, {
"default": ["string", "hello", "another", "default"],
"another_stream": ["abc", "def"]
})
def test_sanitize_inputs(self):
# Note that _sanitize_inputs() should only be called after HeronComponentSpec's
# name attribute is set
# invalid inputs given as argument (valid ones are either dict, list, tuple or None)
invalid_spec = HeronComponentSpec("name",
"classpath",
True,
1,
inputs="string")
with self.assertRaises(TypeError):
invalid_spec._sanitize_inputs()
invalid_spec = HeronComponentSpec("name",
"classpath",
True,
1,
inputs=100)
with self.assertRaises(TypeError):
invalid_spec._sanitize_inputs()
# dict <HeronComponentSpec -> Grouping>
from_spec = HeronComponentSpec("spout", "sp_clspath", True, 1)
to_spec = HeronComponentSpec("bolt",
"bl_clspath",
False,
1,
inputs={from_spec: Grouping.SHUFFLE})
ret = to_spec._sanitize_inputs()
self.assertEqual(
ret, {GlobalStreamId("spout", "default"): Grouping.SHUFFLE})
from_spec = HeronComponentSpec("spout", "sp_clspath", True, 1)
from_spec.outputs = [Stream(name='another_stream')]
to_spec = HeronComponentSpec(
"bolt",
"bl_clspath",
False,
1,
inputs={from_spec['another_stream']: Grouping.ALL})
ret = to_spec._sanitize_inputs()
self.assertEqual(
ret, {GlobalStreamId("spout", "another_stream"): Grouping.ALL})
# HeronComponentSpec's name attribute not set
from_spec = HeronComponentSpec(None, "sp_clspath", True, 1)
to_spec = HeronComponentSpec("bolt",
"bl_clspath",
False,
1,
inputs={from_spec: Grouping.ALL})
with self.assertRaises(RuntimeError):
to_spec._sanitize_inputs()
# dict <GlobalStreamId -> Grouping>
inputs_dict = {
GlobalStreamId("some_spout", "some_stream"):
Grouping.NONE,
GlobalStreamId("another_spout", "default"):
Grouping.fields(['word', 'count'])
}
spec = HeronComponentSpec("bolt",
"classpath",
False,
1,
inputs=inputs_dict)
ret = spec._sanitize_inputs()
self.assertEqual(ret, inputs_dict)
# list of HeronComponentSpec
from_spec1 = HeronComponentSpec("spout1", "sp1_cls", True, 1)
from_spec2 = HeronComponentSpec("spout2", "sp2_cls", True, 1)
to_spec = HeronComponentSpec("bolt",
"bl_cls",
False,
1,
inputs=[from_spec1, from_spec2])
ret = to_spec._sanitize_inputs()
self.assertEqual(
ret, {
GlobalStreamId("spout1", "default"): Grouping.SHUFFLE,
GlobalStreamId("spout2", "default"): Grouping.SHUFFLE
})
# HeronComponentSpec's name attribute not set
from_spec = HeronComponentSpec(None, "sp_clspath", True, 1)
to_spec = HeronComponentSpec("bolt",
"bl_clspath",
False,
1,
inputs=[from_spec])
with self.assertRaises(RuntimeError):
to_spec._sanitize_inputs()
# list of GlobalStreamId
inputs_list = [
GlobalStreamId("spout1", "default"),
GlobalStreamId("spout2", "some_stream")
]
spec = HeronComponentSpec("bolt",
"bl_cls",
False,
1,
inputs=inputs_list)
ret = spec._sanitize_inputs()
self.assertEqual(ret, dict(zip(inputs_list, [Grouping.SHUFFLE] * 2)))
# list of neither GlobalStreamId nor HeronComponentSpec
inputs_list = [None, 123, "string", [GlobalStreamId("sp", "default")]]
spec = HeronComponentSpec("bolt",
"bl_cls",
False,
1,
inputs=inputs_list)
with self.assertRaises(ValueError):
spec._sanitize_inputs()
def test_sanitize_config(self):
# empty dict
ret = HeronComponentSpec._sanitize_config({})
self.assertEqual(ret, {})
# non-dict given
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config("{key: value}")
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config(True)
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config(None)
# non-string key
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config({['k', 'e', 'y']: "value"})
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config({None: "value"})
# convert boolean value
ret = HeronComponentSpec._sanitize_config({"key": True})
self.assertEqual(ret["key"], "true")
ret = HeronComponentSpec._sanitize_config({"key": False})
self.assertEqual(ret["key"], "false")
# convert int and float
ret = HeronComponentSpec._sanitize_config({"key": 10})
self.assertEqual(ret["key"], "10")
ret = HeronComponentSpec._sanitize_config({"key": -2400000})
self.assertEqual(ret["key"], "-2400000")
ret = HeronComponentSpec._sanitize_config({"key": 0.0000001})
self.assertEqual(ret["key"], "1e-07")
ret = HeronComponentSpec._sanitize_config({"key": -15.33333})
self.assertEqual(ret["key"], "-15.33333")
# non-string value -> should expect the same object
ret = HeronComponentSpec._sanitize_config({"key": ['v', 'a', 'l', 'u', 'e']})
self.assertEqual(ret["key"], ['v', 'a', 'l', 'u', 'e'])
ret = HeronComponentSpec._sanitize_config({"key": None})
self.assertEqual(ret["key"], None)
def test_add_bolt_specs(self):
spec = HeronComponentSpec("bolt", "bl_cls", False, 1)
with self.assertRaises(ValueError):
TopologyType.add_bolt_specs(spec, {})
def test_add_spout_specs(self):
# spout with no output
spec = HeronComponentSpec("spout", "sp_cls", True, 1)
with self.assertRaises(ValueError):
TopologyType.add_spout_specs(spec, {})
class JustBolt(Topology):
bolt = HeronComponentSpec(None, "bl_class", False, 4)
def test_sanitize_config(self):
# empty dict
ret = HeronComponentSpec._sanitize_config({})
self.assertEqual(ret, {})
# non-dict given
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config("{key: value}")
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config(True)
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config(None)
# non-string key
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config({['k', 'e', 'y']: "value"})
with self.assertRaises(TypeError):
HeronComponentSpec._sanitize_config({None: "value"})
# convert boolean value
ret = HeronComponentSpec._sanitize_config({"key": True})
self.assertEqual(ret["key"], "true")
ret = HeronComponentSpec._sanitize_config({"key": False})
self.assertEqual(ret["key"], "false")
# convert int and float
ret = HeronComponentSpec._sanitize_config({"key": 10})
self.assertEqual(ret["key"], "10")
ret = HeronComponentSpec._sanitize_config({"key": -2400000})
self.assertEqual(ret["key"], "-2400000")
ret = HeronComponentSpec._sanitize_config({"key": 0.0000001})
self.assertEqual(ret["key"], "1e-07")
ret = HeronComponentSpec._sanitize_config({"key": -15.33333})
self.assertEqual(ret["key"], "-15.33333")
# non-string value -> should expect the same object
ret = HeronComponentSpec._sanitize_config(
{"key": ['v', 'a', 'l', 'u', 'e']})
self.assertEqual(ret["key"], ['v', 'a', 'l', 'u', 'e'])
ret = HeronComponentSpec._sanitize_config({"key": None})
self.assertEqual(ret["key"], None)
def test_sanitize_outputs(self):
# outputs is None (no argument to outputs)
spec = HeronComponentSpec("spout", "class", True, 1)
ret = spec._sanitize_outputs()
self.assertIsNone(ret)
# outputs neither list nor tuple
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = "string"
with self.assertRaises(TypeError):
spec._sanitize_outputs()
# output list contains a non-string and non-Stream object
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = ["string", False, 123]
with self.assertRaises(TypeError):
spec._sanitize_outputs()
# output list is all string
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = ["string", "hello", "heron"]
ret = spec._sanitize_outputs()
self.assertEqual(ret, {"default": ["string", "hello", "heron"]})
# output list has mixed stream
spec = HeronComponentSpec("spout", "class", True, 1)
spec.outputs = ["string", "hello", Stream(fields=["abc", "def"], name="another_stream"),
Stream(fields=["another", "default"], name="default")]
ret = spec._sanitize_outputs()
self.assertEqual(ret, {"default": ["string", "hello", "another", "default"],
"another_stream": ["abc", "def"]})