spiff-arena/tests/SpiffWorkflow/bpmn/CollaborationTest.py

from SpiffWorkflow.bpmn.specs.SubWorkflowTask import CallActivity
from SpiffWorkflow.bpmn.workflow import BpmnWorkflow, BpmnMessage
from SpiffWorkflow.task import TaskState

from tests.SpiffWorkflow.bpmn.BpmnWorkflowTestCase import BpmnWorkflowTestCase

class CollaborationTest(BpmnWorkflowTestCase):

    def testParserProvidesInfoOnMessagesAndCorrelations(self):
        parser = self.get_parser('collaboration.bpmn')
        self.assertEqual(list(parser.messages.keys()), ['love_letter', 'love_letter_response'])
        self.assertEqual(parser.correlations,
                         {'lover_name': {'name': "Lover's Name",
                                         'retrieval_expressions': [
                                             {'expression': 'lover_name',
                                              'messageRef': 'love_letter'},
                                             {'expression': 'from_name',
                                              'messageRef': 'love_letter_response'}]}}
                         )

    def testCollaboration(self):

        spec, subprocesses = self.load_collaboration('collaboration.bpmn', 'my_collaboration')

        # Only executable processes should be started
        self.assertIn('process_buddy', subprocesses)
        self.assertNotIn('random_person_process', subprocesses)
        self.workflow = BpmnWorkflow(spec, subprocesses)
        start = self.workflow.get_tasks_from_spec_name('Start')[0]
        # Set up some data to be evaluated so that the workflow can proceed
        start.data['lover_name'] = 'Peggy'
        self.workflow.do_engine_steps()

        # Call activities should be created for executable processes and be reachable
        buddy = self.workflow.get_tasks_from_spec_name('process_buddy')[0]
        self.assertIsInstance(buddy.task_spec, CallActivity)
        self.assertEqual(buddy.task_spec.spec, 'process_buddy')
        self.assertEqual(buddy.state, TaskState.WAITING)

    def testBpmnMessage(self):

        spec, subprocesses = self.load_workflow_spec('collaboration.bpmn', 'process_buddy')
        workflow = BpmnWorkflow(spec, subprocesses)
        start = workflow.get_tasks_from_spec_name('Start')[0]
        # Set up some data to be evaluated so that the workflow can proceed
        start.data['lover_name'] = 'Peggy'
        workflow.do_engine_steps()
        # An external message should be created
        messages = workflow.get_bpmn_messages()
        self.assertEqual(len(messages), 1)
        self.assertEqual(len(workflow.bpmn_messages), 0)
        receive = workflow.get_tasks_from_spec_name('EventReceiveLetter')[0]

        # Waiting Events should contain details about what we are no waiting on.
        events = workflow.waiting_events()
        self.assertEqual(1, len(events))
        self.assertEqual("Message", events[0]['event_type'])
        self.assertEqual("Love Letter Response", events[0]['name'])
        self.assertEqual(['lover'], events[0]['value'][0].correlation_keys)
        self.assertEqual('from_name', events[0]['value'][0].retrieval_expression)
        self.assertEqual('lover_name', events[0]['value'][0].name)

        # As shown above, the waiting event is looking for a payload with a
        # 'from_name' that should be used to retrieve the lover's name.
        new_message_payload = {'from_name': 'Peggy', 'other_nonsense': 1001}
        workflow.catch_bpmn_message('Love Letter Response', new_message_payload)
        workflow.do_engine_steps()
        # The external message created above should be caught
        self.assertEqual(receive.state, TaskState.COMPLETED)
        # Spiff extensions allow us to specify the destination of a workflow
        # but base BPMN does not, and all keys are added directly to the
        # task data.
        self.assertEqual(workflow.last_task.data, {'from_name': 'Peggy', 'lover_name': 'Peggy', 'other_nonsense': 1001})
        self.assertEqual(workflow.correlations, {'lover':{'lover_name':'Peggy'}})
        self.assertEqual(workflow.is_completed(), True)

    def testCorrelation(self):

        specs = self.get_all_specs('correlation.bpmn')
        proc_1 = specs['proc_1']
        workflow = BpmnWorkflow(proc_1, specs)
        workflow.do_engine_steps()
        for idx, task in enumerate(workflow.get_ready_user_tasks()):
            task.data['task_num'] = idx
            task.run()
        workflow.do_engine_steps()
        ready_tasks = workflow.get_ready_user_tasks()
        waiting = workflow.get_tasks_from_spec_name('get_response')
        # Two processes should have been started and two corresponding catch events should be waiting
        self.assertEqual(len(ready_tasks), 2)
        self.assertEqual(len(waiting), 2)
        for task in waiting:
            self.assertEqual(task.state, TaskState.WAITING)
        # Now copy the task_num that was sent into a new variable
        for task in ready_tasks:
            task.data.update(init_id=task.data['task_num'])
            task.run()
        workflow.do_engine_steps()
        # If the messages were routed properly, the id should match
        for task in workflow.get_tasks_from_spec_name('subprocess_end'):
            self.assertEqual(task.data['task_num'], task.data['init_id'])

    def testTwoCorrelationKeys(self):

        specs = self.get_all_specs('correlation_two_conversations.bpmn')
        proc_1 = specs['proc_1']
        workflow = BpmnWorkflow(proc_1, specs)
        workflow.do_engine_steps()
        for idx, task in enumerate(workflow.get_ready_user_tasks()):
            task.data['task_num'] = idx
            task.run()
        workflow.do_engine_steps()

        # Two processes should have been started and two corresponding catch events should be waiting
        ready_tasks = workflow.get_ready_user_tasks()
        waiting = workflow.get_tasks_from_spec_name('get_response_one')
        self.assertEqual(len(ready_tasks), 2)
        self.assertEqual(len(waiting), 2)
        for task in waiting:
            self.assertEqual(task.state, TaskState.WAITING)
        # Now copy the task_num that was sent into a new variable
        for task in ready_tasks:
            task.data.update(init_id=task.data['task_num'])
            task.run()
        workflow.do_engine_steps()

        # Complete dummy tasks
        for task in workflow.get_ready_user_tasks():
            task.run()
        workflow.do_engine_steps()

        # Repeat for the other process, using a different mapped name
        ready_tasks = workflow.get_ready_user_tasks()
        waiting = workflow.get_tasks_from_spec_name('get_response_two')
        self.assertEqual(len(ready_tasks), 2)
        self.assertEqual(len(waiting), 2)
        for task in ready_tasks:
            task.data.update(subprocess=task.data['task_num'])
            task.run()
        workflow.do_engine_steps()

        # If the messages were routed properly, the id should match
        for task in workflow.get_tasks_from_spec_name('subprocess_end'):
            self.assertEqual(task.data['task_num'], task.data['init_id'])
            self.assertEqual(task.data['task_num'], task.data['subprocess'])

    def testSerialization(self):

        spec, subprocesses = self.load_collaboration('collaboration.bpmn', 'my_collaboration')
        self.workflow = BpmnWorkflow(spec, subprocesses)
        start = self.workflow.get_tasks_from_spec_name('Start')[0]
        start.data['lover_name'] = 'Peggy'
        self.workflow.do_engine_steps()
        self.save_restore()