def test_failed_validation(self):
"""Check that failed validation writes sensible XML to stdout."""
# Override abstract methods
class NewScript(Script):
def get_scheme(self):
return None
def validate_input(self, definition):
raise ValueError("Big fat validation error!")
def stream_events(self, inputs, ew):
# unused
return
script = NewScript()
out = BytesIO()
err = BytesIO()
ew = EventWriter(out, err)
args = [TEST_SCRIPT_PATH, "--validate-arguments"]
return_value = script.run_script(args, ew,
data_open("data/validation.xml"))
expected = ET.parse(data_open("data/validation_error.xml")).getroot()
found = ET.fromstring(out.getvalue().decode('utf-8'))
self.assertEqual(b"", err.getvalue())
self.assertTrue(xml_compare(expected, found))
self.assertNotEqual(0, return_value)
def test_successful_validation(self):
"""Check that successful validation yield no text and a 0 exit value."""
# Override abstract methods
class NewScript(Script):
def get_scheme(self):
return None
def validate_input(self, definition):
# always succeed...
return
def stream_events(self, inputs, ew):
# unused
return
script = NewScript()
out = StringIO()
err = StringIO()
ew = EventWriter(out, err)
args = [TEST_SCRIPT_PATH, "--validate-arguments"]
return_value = script.run_script(args, ew,
data_open("data/validation.xml"))
self.assertEqual("", err.getvalue())
self.assertEqual("", out.getvalue())
self.assertEqual(0, return_value)
def test_error_on_script_with_null_scheme(self):
"""A script that returns a null scheme should generate no output on
stdout and an error on stderr saying that it the scheme was null."""
# Override abstract methods
class NewScript(Script):
def get_scheme(self):
return None
def stream_events(self, inputs, ew):
# not used
return
script = NewScript()
out = BytesIO()
err = BytesIO()
ew = EventWriter(out, err)
in_stream = StringIO()
args = [TEST_SCRIPT_PATH, "--scheme"]
return_value = script.run_script(args, ew, in_stream)
self.assertEqual(b"", out.getvalue())
self.assertEqual(
b"FATAL Modular input script returned a null scheme.\n",
err.getvalue())
self.assertNotEqual(0, return_value)
def test_writing_events_on_event_writer(self):
"""Write a pair of events with an EventWriter, and ensure that they
are being encoded immediately and correctly onto the output stream"""
out = StringIO()
err = StringIO()
ew = EventWriter(out, err)
e = Event(data="This is a test of the emergency broadcast system.",
stanza="fubar",
time="%.3f" % 1372275124.466,
host="localhost",
index="main",
source="hilda",
sourcetype="misc",
done=True,
unbroken=True)
ew.write_event(e)
found = ET.fromstring("%s</stream>" % out.getvalue())
expected = ET.parse(
data_open("data/stream_with_one_event.xml")).getroot()
self.assertTrue(xml_compare(expected, found))
self.assertEqual(err.getvalue(), "")
ew.write_event(e)
ew.close()
found = ET.fromstring(out.getvalue())
expected = ET.parse(
data_open("data/stream_with_two_events.xml")).getroot()
self.assertTrue(xml_compare(expected, found))
def run(self, args):
"""Runs this modular input
:param args: List of command line arguments passed to this script.
:returns: An integer to be used as the exit value of this program.
"""
# call the run_script function, which handles the specifics of running
# a modular input
return self.run_script(args, EventWriter(), sys.stdin)
def test_logging_errors_with_event_writer(capsys):
"""Check that the log method on EventWriter produces the
expected error message."""
ew = EventWriter(sys.stdout, sys.stderr)
ew.log(EventWriter.ERROR, "Something happened!")
captured = capsys.readouterr()
assert captured.err == "ERROR Something happened!\n"
def test_logging_errors_with_event_writer(self):
"""Check that the log method on EventWriter produces the
expected error message."""
out = StringIO()
err = StringIO()
ew = EventWriter(out, err)
ew.log(EventWriter.ERROR, "Something happened!")
self.assertEqual("ERROR Something happened!\n", err.getvalue())
def test_error_in_event_writer():
"""An event which cannot write itself onto an output stream
(such as because it doesn't have a data field set)
should write an error. Check that it does so."""
ew = EventWriter(sys.stdout, sys.stderr)
e = Event()
with pytest.raises(ValueError) as excinfo:
ew.write_event(e)
assert str(
excinfo.value
) == "Events must have at least the data field set to be written to XML."
def test_error_in_event_writer(self):
"""An event which cannot write itself onto an output stream
(such as because it doesn't have a data field set)
should write an error. Check that it does so."""
out = StringIO()
err = StringIO()
ew = EventWriter(out, err)
e = Event()
with self.assertRaises(ValueError):
ew.write_event(e)
self.assertTrue(err.getvalue().startswith(EventWriter.WARN))
def test_write_xml_is_sane(capsys):
"""Check that EventWriter.write_xml_document writes sensible
XML to the output stream."""
ew = EventWriter(sys.stdout, sys.stderr)
with data_open("data/event_maximal.xml") as data:
expected_xml = ET.parse(data).getroot()
ew.write_xml_document(expected_xml)
captured = capsys.readouterr()
found_xml = ET.fromstring(captured.out)
assert xml_compare(expected_xml, found_xml)
def test_error_in_event_writer(self):
"""An event which cannot write itself onto an output stream
(such as because it doesn't have a data field set)
should write an error. Check that it does so."""
out = BytesIO()
err = BytesIO()
ew = EventWriter(out, err)
e = Event()
try:
ew.write_event(e)
self.assertTrue(False)
except ValueError as e:
self.assertEqual("Events must have at least the data field set to be written to XML.", str(e))
def test_write_xml_is_sane(self):
"""Check that EventWriter.write_xml_document writes sensible
XML to the output stream."""
out = StringIO()
err = StringIO()
ew = EventWriter(out, err)
expected_xml = ET.parse(data_open("data/event_maximal.xml")).getroot()
ew.write_xml_document(expected_xml)
found_xml = ET.fromstring(out.getvalue())
self.assertTrue(xml_compare(expected_xml, found_xml))
def test_scheme_properly_generated_by_script(self):
"""Check that a scheme generated by a script is what we expect."""
# Override abstract methods
class NewScript(Script):
def get_scheme(self):
scheme = Scheme("abcd")
scheme.description = u"\uC3BC and \uC3B6 and <&> f\u00FCr"
scheme.streaming_mode = scheme.streaming_mode_simple
scheme.use_external_validation = False
scheme.use_single_instance = True
arg1 = Argument("arg1")
scheme.add_argument(arg1)
arg2 = Argument("arg2")
arg2.description = u"\uC3BC and \uC3B6 and <&> f\u00FCr"
arg2.data_type = Argument.data_type_number
arg2.required_on_create = True
arg2.required_on_edit = True
arg2.validation = "is_pos_int('some_name')"
scheme.add_argument(arg2)
return scheme
def stream_events(self, inputs, ew):
# not used
return
script = NewScript()
out = BytesIO()
err = BytesIO()
ew = EventWriter(out, err)
args = [TEST_SCRIPT_PATH, "--scheme"]
return_value = script.run_script(args, ew, err)
self.assertEqual(b"", err.getvalue())
self.assertEqual(0, return_value)
found = ET.fromstring(out.getvalue())
expected = ET.parse(
data_open("data/scheme_without_defaults.xml")).getroot()
self.assertTrue(xml_compare(expected, found))
def test_write_events(self):
"""Check that passing an input definition and writing a couple events goes smoothly."""
# Override abstract methods
class NewScript(Script):
def get_scheme(self):
return None
def stream_events(self, inputs, ew):
event = Event(
data="This is a test of the emergency broadcast system.",
stanza="fubar",
time="%.3f" % 1372275124.466,
host="localhost",
index="main",
source="hilda",
sourcetype="misc",
done=True,
unbroken=True)
ew.write_event(event)
ew.write_event(event)
script = NewScript()
input_configuration = data_open("data/conf_with_2_inputs.xml")
out = BytesIO()
err = BytesIO()
ew = EventWriter(out, err)
return_value = script.run_script([TEST_SCRIPT_PATH], ew,
input_configuration)
self.assertEqual(0, return_value)
self.assertEqual(b"", err.getvalue())
expected = ET.parse(
data_open("data/stream_with_two_events.xml")).getroot()
found = ET.fromstring(out.getvalue())
self.assertTrue(xml_compare(expected, found))
def test_service_property(self):
""" Check that Script.service returns a valid Service instance as soon
as the stream_events method is called, but not before.
"""
# Override abstract methods
class NewScript(Script):
def __init__(self, test):
super(NewScript, self).__init__()
self.test = test
def get_scheme(self):
return None
def stream_events(self, inputs, ew):
service = self.service
self.test.assertIsInstance(service, Service)
self.test.assertEqual(str(service.authority),
inputs.metadata['server_uri'])
script = NewScript(self)
input_configuration = data_open("data/conf_with_2_inputs.xml")
out = BytesIO()
err = BytesIO()
ew = EventWriter(out, err)
self.assertEqual(script.service, None)
return_value = script.run_script([TEST_SCRIPT_PATH], ew,
input_configuration)
self.assertEqual(0, return_value)
self.assertEqual(b"", err.getvalue())
return
def test_writing_events_on_event_writer(capsys):
"""Write a pair of events with an EventWriter, and ensure that they
are being encoded immediately and correctly onto the output stream"""
ew = EventWriter(sys.stdout, sys.stderr)
e = Event(data="This is a test of the emergency broadcast system.",
stanza="fubar",
time="%.3f" % 1372275124.466,
host="localhost",
index="main",
source="hilda",
sourcetype="misc",
done=True,
unbroken=True)
ew.write_event(e)
captured = capsys.readouterr()
first_out_part = captured.out
with data_open("data/stream_with_one_event.xml") as data:
found = ET.fromstring("%s</stream>" % first_out_part)
expected = ET.parse(data).getroot()
assert xml_compare(expected, found)
assert captured.err == ""
ew.write_event(e)
ew.close()
captured = capsys.readouterr()
with data_open("data/stream_with_two_events.xml") as data:
found = ET.fromstring(first_out_part + captured.out)
expected = ET.parse(data).getroot()
assert xml_compare(expected, found)
def event_writer(output_stream, error_stream):
return EventWriter(output_stream, error_stream)
