asl_test_recognizer.py

from unittest import TestCase

from asl_data import AslDb
from asl_utils import train_all_words
from my_model_selectors import SelectorConstant
from my_recognizer import recognize

FEATURES = ['right-y', 'right-x']

class TestRecognize(TestCase):
    def setUp(self):
        self.asl = AslDb()
        self.training_set = self.asl.build_training(FEATURES)
        self.test_set = self.asl.build_test(FEATURES)
        self.models = train_all_words(self.training_set, SelectorConstant)

    def test_recognize_probabilities_interface(self):
        probs, _ = recognize(self.models, self.test_set)
        self.assertEqual(len(probs), self.test_set.num_items, "Number of test items in probabilities list incorrect.")
        self.assertEqual(len(probs[0]), self.training_set.num_items,
                         "Number of training word probabilities in test item dictionary incorrect.")
        self.assertEqual(len(probs[-1]), self.training_set.num_items,
                         "Number of training word probabilities in test item dictionary incorrect.")
        self.assertIn('FRANK', probs[0], "Dictionary of probabilities does not contain correct keys")
        self.assertIn('CHICKEN', probs[-1], "Dictionary of probabilities does not contain correct keys")

    def test_recognize_guesses_interface(self):
        _, guesses = recognize(self.models, self.test_set)
        self.assertEqual(len(guesses), self.test_set.num_items, "Number of test items in guesses list incorrect.")
        self.assertIsInstance(guesses[0], str, "The guesses are not strings")
        self.assertIsInstance(guesses[-1], str, "The guesses are not strings")