text: import unittest
  
  from anagram import detect_anagrams
  
  
  # Tests adapted from `problem-specifications//canonical-data.json` @ v1.2.0
  
  class AnagramTest(unittest.TestCase):
      def test_no_matches(self):
          candidates = ["hello", "world", "zombies", "pants"]
          self.assertEqual(detect_anagrams("diaper", candidates), [])
  
      def test_detects_two_anagrams(self):
          candidates = ["stream", "pigeon", "maters"]
          self.assertEqual(
              detect_anagrams("master", candidates), ["stream", "maters"])
  
      def test_does_not_detect_anagram_subsets(self):
          self.assertEqual(detect_anagrams("good", ["dog", "goody"]), [])
  
      def test_detects_anagram(self):
          candidates = ["enlists", "google", "inlets", "banana"]
          self.assertEqual(detect_anagrams("listen", candidates), ["inlets"])
  
      def test_detects_three_anagrams(self):
          candidates = [
              "gallery", "ballerina", "regally", "clergy", "largely", "leading"
          ]
          self.assertEqual(
              detect_anagrams("allergy", candidates),
              ["gallery", "regally", "largely"])
  
      def test_does_not_detect_non_anagrams_with_identical_checksum(self):
          self.assertEqual(detect_anagrams("mass", ["last"]), [])
  
      def test_detects_anagrams_case_insensitively(self):
          candidates = ["cashregister", "Carthorse", "radishes"]
          self.assertEqual(
              detect_anagrams("Orchestra", candidates), ["Carthorse"])
  
      def test_detects_anagrams_using_case_insensitive_subject(self):
          candidates = ["cashregister", "carthorse", "radishes"]
          self.assertEqual(
              detect_anagrams("Orchestra", candidates), ["carthorse"])
  
      def test_detects_anagrams_using_case_insensitive_possible_matches(self):
          candidates = ["cashregister", "Carthorse", "radishes"]
          self.assertEqual(
              detect_anagrams("orchestra", candidates), ["Carthorse"])
  
      def test_does_not_detect_a_anagram_if_the_original_word_is_repeated(self):
          self.assertEqual(detect_anagrams("go", ["go Go GO"]), [])
  
      def test_anagrams_must_use_all_letters_exactly_once(self):
          self.assertEqual(detect_anagrams("tapper", ["patter"]), [])
  
      def test_capital_word_is_not_own_anagram(self):
          self.assertEqual(detect_anagrams("BANANA", ["Banana"]), [])
  
  
  if __name__ == '__main__':
      unittest.main()
  