import pytest import stix2 import stix2.environment from .constants import ( ATTACK_PATTERN_ID, ATTACK_PATTERN_KWARGS, CAMPAIGN_ID, CAMPAIGN_KWARGS, COURSE_OF_ACTION_ID, COURSE_OF_ACTION_KWARGS, FAKE_TIME, IDENTITY_ID, IDENTITY_KWARGS, INDICATOR_ID, INDICATOR_KWARGS, INTRUSION_SET_ID, INTRUSION_SET_KWARGS, LOCATION_ID, MALWARE_ID, MALWARE_KWARGS, OBSERVED_DATA_ID, OBSERVED_DATA_KWARGS, RELATIONSHIP_IDS, REPORT_ID, REPORT_KWARGS, THREAT_ACTOR_ID, THREAT_ACTOR_KWARGS, TOOL_ID, TOOL_KWARGS, VULNERABILITY_ID, VULNERABILITY_KWARGS, ) @pytest.fixture def ds(): cam = stix2.v21.Campaign(id=CAMPAIGN_ID, **CAMPAIGN_KWARGS) idy = stix2.v21.Identity(id=IDENTITY_ID, **IDENTITY_KWARGS) ind = stix2.v21.Indicator(id=INDICATOR_ID, **INDICATOR_KWARGS) mal = stix2.v21.Malware(id=MALWARE_ID, **MALWARE_KWARGS) rel1 = stix2.v21.Relationship(ind, 'indicates', mal, id=RELATIONSHIP_IDS[0]) rel2 = stix2.v21.Relationship(mal, 'targets', idy, id=RELATIONSHIP_IDS[1]) rel3 = stix2.v21.Relationship(cam, 'uses', mal, id=RELATIONSHIP_IDS[2]) stix_objs = [cam, idy, ind, mal, rel1, rel2, rel3] yield stix2.MemoryStore(stix_objs) def test_object_factory_created_by_ref_str(): factory = stix2.ObjectFactory(created_by_ref=IDENTITY_ID) ind = factory.create(stix2.v21.Indicator, **INDICATOR_KWARGS) assert ind.created_by_ref == IDENTITY_ID def test_object_factory_created_by_ref_obj(): id_obj = stix2.v21.Identity(id=IDENTITY_ID, **IDENTITY_KWARGS) factory = stix2.ObjectFactory(created_by_ref=id_obj) ind = factory.create(stix2.v21.Indicator, **INDICATOR_KWARGS) assert ind.created_by_ref == IDENTITY_ID def test_object_factory_override_default(): factory = stix2.ObjectFactory(created_by_ref=IDENTITY_ID) new_id = "identity--983b3172-44fe-4a80-8091-eb8098841fe8" ind = factory.create(stix2.v21.Indicator, created_by_ref=new_id, **INDICATOR_KWARGS) assert ind.created_by_ref == new_id def test_object_factory_created(): factory = stix2.ObjectFactory(created=FAKE_TIME) ind = factory.create(stix2.v21.Indicator, **INDICATOR_KWARGS) assert ind.created == FAKE_TIME assert ind.modified == FAKE_TIME def test_object_factory_external_reference(): ext_ref = stix2.v21.ExternalReference( source_name="ACME Threat Intel", description="Threat report", ) factory = stix2.ObjectFactory(external_references=ext_ref) ind = factory.create(stix2.v21.Indicator, **INDICATOR_KWARGS) assert ind.external_references[0].source_name == "ACME Threat Intel" assert ind.external_references[0].description == "Threat report" ind2 = factory.create(stix2.v21.Indicator, external_references=None, **INDICATOR_KWARGS) assert 'external_references' not in ind2 def test_object_factory_obj_markings(): stmt_marking = stix2.v21.StatementMarking("Copyright 2016, Example Corp") mark_def = stix2.v21.MarkingDefinition( definition_type="statement", definition=stmt_marking, ) factory = stix2.ObjectFactory(object_marking_refs=[mark_def, stix2.v21.TLP_AMBER]) ind = factory.create(stix2.v21.Indicator, **INDICATOR_KWARGS) assert mark_def.id in ind.object_marking_refs assert stix2.v21.TLP_AMBER.id in ind.object_marking_refs factory = stix2.ObjectFactory(object_marking_refs=stix2.v21.TLP_RED) ind = factory.create(stix2.v21.Indicator, **INDICATOR_KWARGS) assert stix2.v21.TLP_RED.id in ind.object_marking_refs def test_object_factory_list_append(): ext_ref = stix2.v21.ExternalReference( source_name="ACME Threat Intel", description="Threat report from ACME", ) ext_ref2 = stix2.v21.ExternalReference( source_name="Yet Another Threat Report", description="Threat report from YATR", ) ext_ref3 = stix2.v21.ExternalReference( source_name="Threat Report #3", description="One more threat report", ) factory = stix2.ObjectFactory(external_references=ext_ref) ind = factory.create(stix2.v21.Indicator, external_references=ext_ref2, **INDICATOR_KWARGS) assert ind.external_references[1].source_name == "Yet Another Threat Report" ind = factory.create(stix2.v21.Indicator, external_references=[ext_ref2, ext_ref3], **INDICATOR_KWARGS) assert ind.external_references[2].source_name == "Threat Report #3" def test_object_factory_list_replace(): ext_ref = stix2.v21.ExternalReference( source_name="ACME Threat Intel", description="Threat report from ACME", ) ext_ref2 = stix2.v21.ExternalReference( source_name="Yet Another Threat Report", description="Threat report from YATR", ) factory = stix2.ObjectFactory(external_references=ext_ref, list_append=False) ind = factory.create(stix2.v21.Indicator, external_references=ext_ref2, **INDICATOR_KWARGS) assert len(ind.external_references) == 1 assert ind.external_references[0].source_name == "Yet Another Threat Report" def test_environment_functions(): env = stix2.Environment( stix2.ObjectFactory(created_by_ref=IDENTITY_ID), stix2.MemoryStore(), ) # Create a STIX object ind = env.create(stix2.v21.Indicator, id=INDICATOR_ID, **INDICATOR_KWARGS) assert ind.created_by_ref == IDENTITY_ID # Add objects to datastore ind2 = ind.new_version(labels=['benign']) env.add([ind, ind2]) # Get both versions of the object resp = env.all_versions(INDICATOR_ID) assert len(resp) == 2 # Get just the most recent version of the object resp = env.get(INDICATOR_ID) assert resp['labels'][0] == 'benign' # Search on something other than id query = [stix2.Filter('type', '=', 'vulnerability')] resp = env.query(query) assert len(resp) == 0 # See different results after adding filters to the environment env.add_filters([ stix2.Filter('type', '=', 'indicator'), stix2.Filter('created_by_ref', '=', IDENTITY_ID), ]) env.add_filter(stix2.Filter('labels', '=', 'benign')) # should be 'malicious-activity' resp = env.get(INDICATOR_ID) assert resp['labels'][0] == 'benign' # should be 'malicious-activity' def test_environment_source_and_sink(): ind = stix2.v21.Indicator(id=INDICATOR_ID, **INDICATOR_KWARGS) env = stix2.Environment(source=stix2.MemorySource([ind]), sink=stix2.MemorySink([ind])) assert env.get(INDICATOR_ID).indicator_types[0] == 'malicious-activity' def test_environment_datastore_and_sink(): with pytest.raises(ValueError) as excinfo: stix2.Environment( factory=stix2.ObjectFactory(), store=stix2.MemoryStore(), sink=stix2.MemorySink, ) assert 'Data store already provided' in str(excinfo.value) def test_environment_no_datastore(): env = stix2.Environment(factory=stix2.ObjectFactory()) with pytest.raises(AttributeError) as excinfo: env.add(stix2.v21.Indicator(**INDICATOR_KWARGS)) assert 'Environment has no data sink to put objects in' in str(excinfo.value) with pytest.raises(AttributeError) as excinfo: env.get(INDICATOR_ID) assert 'Environment has no data source' in str(excinfo.value) with pytest.raises(AttributeError) as excinfo: env.all_versions(INDICATOR_ID) assert 'Environment has no data source' in str(excinfo.value) with pytest.raises(AttributeError) as excinfo: env.query(INDICATOR_ID) assert 'Environment has no data source' in str(excinfo.value) with pytest.raises(AttributeError) as excinfo: env.relationships(INDICATOR_ID) assert 'Environment has no data source' in str(excinfo.value) with pytest.raises(AttributeError) as excinfo: env.related_to(INDICATOR_ID) assert 'Environment has no data source' in str(excinfo.value) def test_environment_add_filters(): env = stix2.Environment(factory=stix2.ObjectFactory()) env.add_filters([INDICATOR_ID]) env.add_filter(INDICATOR_ID) def test_environment_datastore_and_no_object_factory(): # Uses a default object factory env = stix2.Environment(store=stix2.MemoryStore()) ind = env.create(stix2.v21.Indicator, id=INDICATOR_ID, **INDICATOR_KWARGS) assert ind.id == INDICATOR_ID def test_parse_malware(): env = stix2.Environment() data = """{ "type": "malware", "spec_version": "2.1", "id": "malware--9c4638ec-f1de-4ddb-abf4-1b760417654e", "created": "2017-01-01T12:34:56.000Z", "modified": "2017-01-01T12:34:56.000Z", "name": "Cryptolocker", "malware_types": [ "ransomware" ] }""" mal = env.parse(data, version="2.1") assert mal.type == 'malware' assert mal.spec_version == '2.1' assert mal.id == MALWARE_ID assert mal.created == FAKE_TIME assert mal.modified == FAKE_TIME assert mal.malware_types == ['ransomware'] assert mal.name == "Cryptolocker" def test_creator_of(): identity = stix2.v21.Identity(**IDENTITY_KWARGS) factory = stix2.ObjectFactory(created_by_ref=identity.id) env = stix2.Environment(store=stix2.MemoryStore(), factory=factory) env.add(identity) ind = env.create(stix2.v21.Indicator, **INDICATOR_KWARGS) creator = env.creator_of(ind) assert creator is identity def test_creator_of_no_datasource(): identity = stix2.v21.Identity(**IDENTITY_KWARGS) factory = stix2.ObjectFactory(created_by_ref=identity.id) env = stix2.Environment(factory=factory) ind = env.create(stix2.v21.Indicator, **INDICATOR_KWARGS) with pytest.raises(AttributeError) as excinfo: env.creator_of(ind) assert 'Environment has no data source' in str(excinfo.value) def test_creator_of_not_found(): identity = stix2.v21.Identity(**IDENTITY_KWARGS) factory = stix2.ObjectFactory(created_by_ref=identity.id) env = stix2.Environment(store=stix2.MemoryStore(), factory=factory) ind = env.create(stix2.v21.Indicator, **INDICATOR_KWARGS) creator = env.creator_of(ind) assert creator is None def test_creator_of_no_created_by_ref(): env = stix2.Environment(store=stix2.MemoryStore()) ind = env.create(stix2.v21.Indicator, **INDICATOR_KWARGS) creator = env.creator_of(ind) assert creator is None def test_relationships(ds): env = stix2.Environment(store=ds) mal = env.get(MALWARE_ID) resp = env.relationships(mal) assert len(resp) == 3 assert any(x['id'] == RELATIONSHIP_IDS[0] for x in resp) assert any(x['id'] == RELATIONSHIP_IDS[1] for x in resp) assert any(x['id'] == RELATIONSHIP_IDS[2] for x in resp) def test_relationships_no_id(ds): env = stix2.Environment(store=ds) mal = { "type": "malware", "name": "some variant", } with pytest.raises(ValueError) as excinfo: env.relationships(mal) assert "object has no 'id' property" in str(excinfo.value) def test_relationships_by_type(ds): env = stix2.Environment(store=ds) mal = env.get(MALWARE_ID) resp = env.relationships(mal, relationship_type='indicates') assert len(resp) == 1 assert resp[0]['id'] == RELATIONSHIP_IDS[0] def test_relationships_by_source(ds): env = stix2.Environment(store=ds) resp = env.relationships(MALWARE_ID, source_only=True) assert len(resp) == 1 assert resp[0]['id'] == RELATIONSHIP_IDS[1] def test_relationships_by_target(ds): env = stix2.Environment(store=ds) resp = env.relationships(MALWARE_ID, target_only=True) assert len(resp) == 2 assert any(x['id'] == RELATIONSHIP_IDS[0] for x in resp) assert any(x['id'] == RELATIONSHIP_IDS[2] for x in resp) def test_relationships_by_target_and_type(ds): env = stix2.Environment(store=ds) resp = env.relationships(MALWARE_ID, relationship_type='uses', target_only=True) assert len(resp) == 1 assert any(x['id'] == RELATIONSHIP_IDS[2] for x in resp) def test_relationships_by_target_and_source(ds): env = stix2.Environment(store=ds) with pytest.raises(ValueError) as excinfo: env.relationships(MALWARE_ID, target_only=True, source_only=True) assert 'not both' in str(excinfo.value) def test_related_to(ds): env = stix2.Environment(store=ds) mal = env.get(MALWARE_ID) resp = env.related_to(mal) assert len(resp) == 3 assert any(x['id'] == CAMPAIGN_ID for x in resp) assert any(x['id'] == INDICATOR_ID for x in resp) assert any(x['id'] == IDENTITY_ID for x in resp) def test_related_to_no_id(ds): env = stix2.Environment(store=ds) mal = { "type": "malware", "name": "some variant", } with pytest.raises(ValueError) as excinfo: env.related_to(mal) assert "object has no 'id' property" in str(excinfo.value) def test_related_to_by_source(ds): env = stix2.Environment(store=ds) resp = env.related_to(MALWARE_ID, source_only=True) assert len(resp) == 1 assert resp[0]['id'] == IDENTITY_ID def test_related_to_by_target(ds): env = stix2.Environment(store=ds) resp = env.related_to(MALWARE_ID, target_only=True) assert len(resp) == 2 assert any(x['id'] == CAMPAIGN_ID for x in resp) assert any(x['id'] == INDICATOR_ID for x in resp) def test_semantic_equivalence_on_same_attack_pattern(): ap1 = stix2.v21.AttackPattern(id=ATTACK_PATTERN_ID, **ATTACK_PATTERN_KWARGS) ap2 = stix2.v21.AttackPattern(id=ATTACK_PATTERN_ID, **ATTACK_PATTERN_KWARGS) env = stix2.Environment().semantically_equivalent(ap1, ap2) assert round(env) == 100 def test_semantic_equivalence_on_same_campaign1(): camp1 = stix2.v21.Campaign(id=CAMPAIGN_ID, **CAMPAIGN_KWARGS) camp2 = stix2.v21.Campaign(id=CAMPAIGN_ID, **CAMPAIGN_KWARGS) env = stix2.Environment().semantically_equivalent(camp1, camp2) assert round(env) == 100 def test_semantic_equivalence_on_same_campaign2(): CAMP_KWARGS = dict( name="Green Group Attacks Against Finance", description="Campaign by Green Group against a series of targets in the financial services sector.", aliases=["super-green", "some-green"], ) camp1 = stix2.v21.Campaign(id=CAMPAIGN_ID, **CAMP_KWARGS) camp2 = stix2.v21.Campaign(id=CAMPAIGN_ID, **CAMP_KWARGS) env = stix2.Environment().semantically_equivalent(camp1, camp2) assert round(env) == 100 def test_semantic_equivalence_on_same_identity1(): iden1 = stix2.v21.Identity(id=IDENTITY_ID, **IDENTITY_KWARGS) iden2 = stix2.v21.Identity(id=IDENTITY_ID, **IDENTITY_KWARGS) env = stix2.Environment().semantically_equivalent(iden1, iden2) assert round(env) == 100 def test_semantic_equivalence_on_same_identity2(): IDEN_KWARGS = dict( name="John Smith", identity_class="individual", sectors=["government", "critical-infrastructure"], ) iden1 = stix2.v21.Identity(id=IDENTITY_ID, **IDEN_KWARGS) iden2 = stix2.v21.Identity(id=IDENTITY_ID, **IDEN_KWARGS) env = stix2.Environment().semantically_equivalent(iden1, iden2) assert round(env) == 100 def test_semantic_equivalence_on_same_indicator(): ind1 = stix2.v21.Indicator(id=INDICATOR_ID, **INDICATOR_KWARGS) ind2 = stix2.v21.Indicator(id=INDICATOR_ID, **INDICATOR_KWARGS) env = stix2.Environment().semantically_equivalent(ind1, ind2) assert round(env) == 20 # No support for pattern, hence the 20 def test_semantic_equivalence_on_same_location1(): LOCATION_KWARGS = dict(latitude=45, longitude=179) loc1 = stix2.v21.Location(id=LOCATION_ID, **LOCATION_KWARGS) loc2 = stix2.v21.Location(id=LOCATION_ID, **LOCATION_KWARGS) env = stix2.Environment().semantically_equivalent(loc1, loc2) assert round(env) == 100 def test_semantic_equivalence_on_same_location2(): LOCATION_KWARGS = dict( latitude=38.889, longitude=-77.023, region="northern-america", country="us", ) loc1 = stix2.v21.Location(id=LOCATION_ID, **LOCATION_KWARGS) loc2 = stix2.v21.Location(id=LOCATION_ID, **LOCATION_KWARGS) env = stix2.Environment().semantically_equivalent(loc1, loc2) assert round(env) == 100 def test_semantic_equivalence_on_same_malware(): malw1 = stix2.v21.Malware(id=MALWARE_ID, **MALWARE_KWARGS) malw2 = stix2.v21.Malware(id=MALWARE_ID, **MALWARE_KWARGS) env = stix2.Environment().semantically_equivalent(malw1, malw2) assert round(env) == 100 def test_semantic_equivalence_on_same_threat_actor1(): ta1 = stix2.v21.ThreatActor(id=THREAT_ACTOR_ID, **THREAT_ACTOR_KWARGS) ta2 = stix2.v21.ThreatActor(id=THREAT_ACTOR_ID, **THREAT_ACTOR_KWARGS) env = stix2.Environment().semantically_equivalent(ta1, ta2) assert round(env) == 100 def test_semantic_equivalence_on_same_threat_actor2(): THREAT_KWARGS = dict( threat_actor_types=["crime-syndicate"], aliases=["super-evil"], name="Evil Org", ) ta1 = stix2.v21.ThreatActor(id=THREAT_ACTOR_ID, **THREAT_KWARGS) ta2 = stix2.v21.ThreatActor(id=THREAT_ACTOR_ID, **THREAT_KWARGS) env = stix2.Environment().semantically_equivalent(ta1, ta2) assert round(env) == 100 def test_semantic_equivalence_on_same_tool(): tool1 = stix2.v21.Tool(id=TOOL_ID, **TOOL_KWARGS) tool2 = stix2.v21.Tool(id=TOOL_ID, **TOOL_KWARGS) env = stix2.Environment().semantically_equivalent(tool1, tool2) assert round(env) == 100 def test_semantic_equivalence_on_same_vulnerability1(): vul1 = stix2.v21.Vulnerability(id=VULNERABILITY_ID, **VULNERABILITY_KWARGS) vul2 = stix2.v21.Vulnerability(id=VULNERABILITY_ID, **VULNERABILITY_KWARGS) env = stix2.Environment().semantically_equivalent(vul1, vul2) assert round(env) == 100 def test_semantic_equivalence_on_same_vulnerability2(): VULN_KWARGS1 = dict( name="Heartbleed", external_references=[ { "url": "https://example", "source_name": "some-source", }, ], ) VULN_KWARGS2 = dict( name="Zot", external_references=[ { "url": "https://example2", "source_name": "some-source2", }, ], ) vul1 = stix2.v21.Vulnerability(id=VULNERABILITY_ID, **VULN_KWARGS1) vul2 = stix2.v21.Vulnerability(id=VULNERABILITY_ID, **VULN_KWARGS2) env = stix2.Environment().semantically_equivalent(vul1, vul2) assert round(env) == 0.0 def test_semantic_equivalence_different_type_raises(): with pytest.raises(ValueError) as excinfo: vul1 = stix2.v21.Vulnerability(id=VULNERABILITY_ID, **VULNERABILITY_KWARGS) ind1 = stix2.v21.Indicator(id=INDICATOR_ID, **INDICATOR_KWARGS) stix2.Environment().semantically_equivalent(vul1, ind1) assert str(excinfo.value) == "The objects to compare must be of the same type!" def test_semantic_equivalence_different_spec_version_raises(): with pytest.raises(ValueError) as excinfo: V20_KWARGS = dict( labels=['malicious-activity'], pattern="[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']", ) ind1 = stix2.v21.Indicator(id=INDICATOR_ID, **INDICATOR_KWARGS) ind2 = stix2.v20.Indicator(id=INDICATOR_ID, **V20_KWARGS) stix2.Environment().semantically_equivalent(ind1, ind2) assert str(excinfo.value) == "The objects to compare must be of the same spec version!" def test_semantic_equivalence_on_unsupported_types(): coa1 = stix2.v21.CourseOfAction(id=COURSE_OF_ACTION_ID, **COURSE_OF_ACTION_KWARGS) ints1 = stix2.v21.IntrusionSet(id=INTRUSION_SET_ID, **INTRUSION_SET_KWARGS) obs1 = stix2.v21.ObservedData(id=OBSERVED_DATA_ID, **OBSERVED_DATA_KWARGS) rep1 = stix2.v21.Report(id=REPORT_ID, **REPORT_KWARGS) coa2 = stix2.v21.CourseOfAction(id=COURSE_OF_ACTION_ID, **COURSE_OF_ACTION_KWARGS) ints2 = stix2.v21.IntrusionSet(id=INTRUSION_SET_ID, **INTRUSION_SET_KWARGS) obs2 = stix2.v21.ObservedData(id=OBSERVED_DATA_ID, **OBSERVED_DATA_KWARGS) rep2 = stix2.v21.Report(id=REPORT_ID, **REPORT_KWARGS) obj_list = [(coa1, coa2), (ints1, ints2), (obs1, obs2), (rep1, rep2)] for obj1, obj2 in obj_list: env = stix2.Environment().semantically_equivalent(obj1, obj2) assert round(env) == 0 def test_semantic_equivalence_zero_match(): IND_KWARGS = dict( indicator_types=["APTX"], pattern="[ipv4-addr:value = '192.168.1.1']", ) weigths = { "attack-pattern": { "name": 30, "external_references": 70, }, "campaign": { "name": 60, "aliases": 40, }, "identity": { "name": 60, "identity_class": 20, "sectors": 20, }, "indicator": { "indicator_types": 15, "pattern": 85, "valid_from": 0, }, "location": { "longitude_latitude": 34, "region": 33, "country": 33, }, "malware": { "malware_types": 20, "name": 80, }, "threat-actor": { "name": 60, "threat_actor_types": 20, "aliases": 20, }, "tool": { "tool_types": 20, "name": 80, }, "vulnerability": { "name": 30, "external_references": 70, }, "_internal": { "tdelta": 1, }, } ind1 = stix2.v21.Indicator(id=INDICATOR_ID, **INDICATOR_KWARGS) ind2 = stix2.v21.Indicator(id=INDICATOR_ID, **IND_KWARGS) env = stix2.Environment().semantically_equivalent(ind1, ind2, **weigths) assert round(env) == 0 @pytest.mark.parametrize( "refs1,refs2,ret_val", [ ( [ { "url": "https://attack.mitre.org/techniques/T1150", "source_name": "mitre-attack", "external_id": "T1150", }, { "url": "https://researchcenter.paloaltonetworks.com/2016/09/unit42-sofacys-komplex-os-x-trojan/", "source_name": "Sofacy Komplex Trojan", "description": "Dani Creus, Tyler Halfpop, Robert Falcone. (2016, September 26). Sofacy's 'Komplex' OS X Trojan. Retrieved July 8, 2017.", }, ], [ { "url": "https://attack.mitre.org/techniques/T1129", "source_name": "mitre-attack", "external_id": "T1129", }, { "url": "https://en.wikipedia.org/wiki/Microsoft_Windows_library_files", "source_name": "Wikipedia Windows Library Files", "description": "Wikipedia. (2017, January 31). Microsoft Windows library files. Retrieved February 13, 2017.", }, ], 0.0, ), ( [ { "url": "https://attack.mitre.org/techniques/T1129", "source_name": "mitre-attack", "external_id": "T1129", }, ], [ { "url": "https://attack.mitre.org/techniques/T1129", "source_name": "mitre-attack", "external_id": "T1129", }, { "url": "https://en.wikipedia.org/wiki/Microsoft_Windows_library_files", "source_name": "Wikipedia Windows Library Files", "description": "Wikipedia. (2017, January 31). Microsoft Windows library files. Retrieved February 13, 2017.", }, ], 1.0, ), ( [ { "url": "https://example", "source_name": "some-source", }, ], [ { "url": "https://example", "source_name": "some-source", }, ], 1.0, ), ], ) def test_semantic_equivalence_external_references(refs1, refs2, ret_val): value = stix2.environment._partial_external_reference_based(refs1, refs2) assert value == ret_val def test_semantic_equivalence_timetamp(): t1 = "2018-10-17T00:14:20.652Z" t2 = "2018-10-17T12:14:20.652Z" assert stix2.environment._partial_timestamp_based(t1, t2, 1) == 0.5 def test_semantic_equivalence_exact_match(): t1 = "2018-10-17T00:14:20.652Z" t2 = "2018-10-17T12:14:20.652Z" assert stix2.environment._exact_match(t1, t2) == 0.0