def test_tokens(self):
     histogram = Listogram(self.fish_words)
     # Verify total count of all word tokens
     assert len(self.fish_words) == 8
     assert histogram.tokens == 8
     # Adding words again should double total count of all word tokens
     for word in self.fish_words:
         histogram.add_count(word)
     assert histogram.tokens == 8 * 2
 def test_types(self):
     histogram = Listogram(self.fish_words)
     # Verify count of distinct word types
     assert len(set(self.fish_words)) == 5
     assert histogram.types == 5
     # Adding words again should not change count of distinct word types
     for word in self.fish_words:
         histogram.add_count(word)
     assert histogram.types == 5
 def test_add_count(self):
     histogram = Listogram(self.fish_words)
     # Add more words to update frequency counts
     histogram.add_count('two', 2)
     histogram.add_count('blue', 3)
     histogram.add_count('fish', 4)
     histogram.add_count('food', 5)
     # Verify updated frequency count of all words
     assert histogram.frequency('one') == 1
     assert histogram.frequency('two') == 3
     assert histogram.frequency('red') == 1
     assert histogram.frequency('blue') == 4
     assert histogram.frequency('fish') == 8
     assert histogram.frequency('food') == 5
     # Verify count of distinct word types
     assert histogram.types == 6
     # Verify total count of all word tokens
     assert histogram.tokens == 8 + 14