"""test_producers.py -- test the producers in the pipeline (eg ffmpeg, visualisation, json)"""
import unittest
import pipeline.video_producers as producers


class MockFeature():
    """Mock feature object for testing JSONProducer"""
    def __init__(self, interval):
        self.interval = interval
    def to_json(self):
        return {"interval": self.interval}

class TestVisualisationProducer(unittest.TestCase):
    """Test VisualisationProducer (produces matplotlib visualisations)"""

    def test_init_empty(self):
        # test with no features -- should raise ValueError
        with self.assertRaises(ValueError):
            producers.VisualisationProducer(features=None)

    def test_init(self):
        # test with features
        feature = MockFeature(interval="")
        features = [feature]
        visprod = producers.VisualisationProducer(features=features)
        self.assertEqual(visprod.features, features)

    def test_produce(self):
        """Test we can call produce without error"""
        # TODO
        pass

class TestJSONProducer(unittest.TestCase):
    def test_init_empty(self):
        # test with no features -- should raise ValueError
        with self.assertRaises(ValueError):
            producers.JSONProducer(features=None)

    def test_init(self):
        # test with features
        feature = MockFeature(interval="")
        features = [feature]
        jsonprod = producers.JSONProducer(features=features)
        self.assertEqual(jsonprod.features, features)

    def test_produce(self):
        """Test we can call produce without error"""
        feature = MockFeature(interval="")
        features = [feature]
        jsonprod = producers.JSONProducer(features=features)
        jsonprod.produce()