...ts/' directory to test the newly added sentiment analysis functionality. This test file includes a TestSentimentAnalysis class that inherits from unittest.TestCase. We've created six test methods to cover various scenarios:
1. test_positive_sentiment: Tests the function with clearly positive sentences.
2. test_negative_sentiment: Tests the function with clearly negative sentences.
3. test_neutral_sentiment: Tests the function with neutral sentences.
4. test_mixed_sentiment: Tests the function with a mix of positive and negative sentences.
5. test_empty_input: Tests the function's behavior with an empty string input.
6. test_single_word: Tests the function with a single word input.
Each test method creates a sample text, calls the detect_sentiment function, and then asserts the expected results using unittest's assertion methods. We're checking both the number of sentiment analyses returned (which should match the number of sentences) and the sentiment classification for each sentence.