How to use the flower.events.EventsState function in flower

def test_pagination(self):
        state = EventsState()
        state.get_or_create_worker('worker1')
        events = [Event('worker-online', hostname='worker1')]
        events += task_succeeded_events(worker='worker1', name='task1',
                                        id='123')
        events += task_succeeded_events(worker='worker1', name='task2',
                                        id='456')
        for i, e in enumerate(events):
            e['clock'] = i
            e['local_received'] = time.time()
            state.event(e)
        self.app.events.state = state

        params = dict(draw=1, start=0, length=10)
        params['search[value]'] = ''
        params['order[0][column]'] = 0
        params['columns[0][data]'] = 'name'

def test_tasks(self):
        state = EventsState()
        state.get_or_create_worker('worker1')
        state.get_or_create_worker('worker2')
        state.get_or_create_worker('worker3')
        events = [Event('worker-online', hostname='worker1'),
                  Event('worker-online', hostname='worker2')]
        for i in range(100):
            events += task_succeeded_events(worker='worker1')
        for i in range(10):
            events += task_succeeded_events(worker='worker3')
        for i in range(13):
            events += task_failed_events(worker='worker3')
        for i, e in enumerate(events):
            e['clock'] = i
            e['local_received'] = time.time()
            state.event(e)

def test_succeeded_task(self):
        state = EventsState()
        state.get_or_create_worker('worker1')
        events = [Event('worker-online', hostname='worker1')]
        events += task_succeeded_events(worker='worker1', name='task1',
                                        id='123')
        for i, e in enumerate(events):
            e['clock'] = i
            e['local_received'] = time.time()
            state.event(e)
        self.app.events.state = state

        params = dict(draw=1, start=0, length=10)
        params['search[value]'] = ''
        params['order[0][column]'] = 0
        params['columns[0][data]'] = 'name'
        params['order[0][dir]'] = 'asc'

def test_task_started(self):
        state = EventsState()
        state.get_or_create_worker('worker1')
        state.get_or_create_worker('worker2')
        events = [Event('worker-online', hostname='worker1'),
                  Event('worker-online', hostname='worker2'),
                  Event('task-received', uuid='123', name='task1',
                        args='(2, 2)', kwargs="{'foo': 'bar'}",
                        retries=0, eta=None, hostname='worker1'),
                  Event('task-started', uuid='123', hostname='worker1')]
        for i, e in enumerate(events):
            e['clock'] = i
            e['local_received'] = time.time()
            state.event(e)

        self.app.events.state = state

        r = self.get('/dashboard')

def test_single_workers_offline(self):
        state = EventsState()
        state.get_or_create_worker('worker1')
        state.event(Event('worker-online', hostname='worker1',
                          local_received=time.time()))
        state.event(Event('worker-offline', hostname='worker1',
                          local_received=time.time()))
        self.app.events.state = state

        r = self.get('/dashboard')

        table = HtmlTableParser()
        table.parse(str(r.body))

        self.assertEqual(200, r.code)
        self.assertEqual(1, len(table.rows()))
        self.assertTrue(table.get_row('worker1'))
        self.assertEqual(['worker1', 'False', '0', '0', '0', '0', '0', None],

def test_sort_runtime(self):
        state = EventsState()
        state.get_or_create_worker('worker1')
        events = [Event('worker-online', hostname='worker1')]
        events += task_succeeded_events(worker='worker1', name='task1',
                                        id='123', runtime=10.0)
        events += task_succeeded_events(worker='worker1', name='task1',
                                        id='456', runtime=2.0)
        for i, e in enumerate(events):
            e['clock'] = i
            e['local_received'] = time.time()
            state.event(e)
        self.app.events.state = state

        params = dict(draw=1, start=0, length=10)
        params['search[value]'] = ''
        params['order[0][column]'] = 0
        params['columns[0][data]'] = 'runtime'

def test_task_failed(self):
        state = EventsState()
        state.get_or_create_worker('worker1')
        state.get_or_create_worker('worker2')
        events = [Event('worker-online', hostname='worker1'),
                  Event('worker-online', hostname='worker2'),
                  Event('task-received', uuid='123', name='task1',
                        args='(2, 2)', kwargs="{'foo': 'bar'}",
                        retries=0, eta=None, hostname='worker1'),
                  Event('task-started', uuid='123', hostname='worker1'),
                  Event('task-failed', uuid='123', exception="KeyError('foo')",
                        traceback='line 1 at main', hostname='worker1')]
        for i, e in enumerate(events):
            e['clock'] = i
            e['local_received'] = time.time()
            state.event(e)

        self.app.events.state = state

def test_task_retried(self):
        state = EventsState()
        state.get_or_create_worker('worker1')
        state.get_or_create_worker('worker2')
        events = [Event('worker-online', hostname='worker1'),
                  Event('worker-online', hostname='worker2'),
                  Event('task-received', uuid='123', name='task1',
                        args='(2, 2)', kwargs="{'foo': 'bar'}",
                        retries=0, eta=None, hostname='worker1'),
                  Event('task-started', uuid='123', hostname='worker1'),
                  Event('task-retried', uuid='123', exception="KeyError('bar')",
                        traceback='line 2 at main', hostname='worker1'),
                  Event('task-failed', uuid='123', exception="KeyError('foo')",
                        traceback='line 1 at main', hostname='worker1')]
        for i, e in enumerate(events):
            e['clock'] = i
            e['local_received'] = time.time()
            state.event(e)

def test_sort_incomparable(self):
        state = EventsState()
        state.get_or_create_worker('worker1')
        events = [Event('worker-online', hostname='worker1')]
        events += task_succeeded_events(worker='worker1', name='task1',
                                        id='123')
        events += task_succeeded_events(worker='worker1', name='task1',
                                        id='456', runtime=None)
        for i, e in enumerate(events):
            e['clock'] = i
            e['local_received'] = time.time()
            state.event(e)
        self.app.events.state = state

        params = dict(draw=1, start=0, length=10)
        params['search[value]'] = ''
        params['order[0][column]'] = 0
        params['columns[0][data]'] = 'runtime'

def event(self, event):
        worker_name = event['hostname']
        event_type = event['type']

        self.counter[worker_name][event_type] += 1

        # Send event to api subscribers (via websockets)
        classname = api.events.getClassName(event_type)
        cls = getattr(api.events, classname, None)
        if cls:
            cls.send_message(event)

        # Save the event
        super(EventsState, self).event(event)