def test_remove_special_character_empty_input(self):
# Setup
input_text = ''
expected_output = ''
# Actual call
output_text = remove_special_character(input_text)
# Asserts
self.assertEqual(output_text, expected_output)
def test_remove_special_character_no_special_characters(self):
# Setup
input_text = 'Hello world'
expected_output = 'Hello world'
# Actual call
output_text = remove_special_character(input_text)
# Asserts
self.assertEqual(output_text, expected_output)
def test_remove_special_character_all_special_characters(self):
# Setup
input_text = '弫¥ª°©ð±§µæ¹¢³¿®ä£'
expected_output = ''
# Actual call
output_text = remove_special_character(input_text)
# Asserts
self.assertEqual(output_text, expected_output)
def test_remove_special_character(self):
# Setup
input_text = 'Hello 弫 Welcome.'
expected_output = 'Hello Welcome.'
# Actual call
output_text = remove_special_character(input_text)
# Asserts
self.assertEqual(output_text, expected_output)