Question

Music inspired to move unit test

Answer 1

Creating a unit test for a function that filters or selects music inspired to move (perhaps energetic or upbeat music) would require a hypothetical implementation of such a function. Below is an example in Python that illustrates how you might write a unit test for a function called `filter_moving_music`.

First, let's assume we have a simple implementation of the `filter_moving_music` function:

```python
# music_selector.py

def filter_moving_music(music_list):
"""
Filters out music that is classified as moving or energetic.
"""
moving_genres = ['dance', 'pop', 'electronic', 'hip-hop', 'upbeat']
return [song for song in music_list if song['genre'] in moving_genres]
```

Next, we would write a unit test for this function using the `unittest` framework:

```python
# test_music_selector.py

import unittest
from music_selector import filter_moving_music

class TestMusicSelector(unittest.TestCase):

def setUp(self):
self.music_list = [
{'title': 'Electric Feel', 'genre': 'electronic'},
{'title': 'Lose Yourself', 'genre': 'hip-hop'},
{'title': 'Ain\'t No Mountain High Enough', 'genre': 'soul'},
{'title': 'Uptown Funk', 'genre': 'pop'},
{'title': 'Slow Hands', 'genre': 'acoustic'},
{'title': 'Titanium', 'genre': 'dance'},
{'title': 'Shape of You', 'genre': 'pop'}
]

def test_filter_moving_music(self):
expected_result = [
{'title': 'Electric Feel', 'genre': 'electronic'},
{'title': 'Lose Yourself', 'genre': 'hip-hop'},
{'title': 'Uptown Funk', 'genre': 'pop'},
{'title': 'Titanium', 'genre': 'dance'},
{'title': 'Shape of You', 'genre': 'pop'}
]
result = filter_moving_music(self.music_list)
self.assertEqual(result, expected_result)

def test_no_moving_music(self):
non_moving_music_list = [
{'title': 'Someone Like You', 'genre': 'soul'},
{'title': 'Stay', 'genre': 'acoustic'},
{'title': 'The Night We Met', 'genre': 'indie'}
]
result = filter_moving_music(non_moving_music_list)
self.assertEqual(result, [])

def test_empty_music_list(self):
result = filter_moving_music([])
self.assertEqual(result, [])

if __name__ == '__main__':
unittest.main()
```

### Explanation

1. **`filter_moving_music` function**: This function takes a list of songs (dictionaries containing a title and genre) and returns a list of songs that belong to designated moving genres.

2. **Unit tests**:
- **`setUp` method**: This sets up the initial list of music that will be used for testing.
- **`test_filter_moving_music`**: This test checks if the function correctly filters out the moving music.
- **`test_no_moving_music`**: This test checks if the function returns an empty list when there are no moving music genres present.
- **`test_empty_music_list`**: This test verifies that the function handles an empty input list correctly.

You can run these tests using Python's unittest framework to ensure that your `filter_moving_music` function works as expected.