def test_scan_one_word(three_lines):
result = list(scan(three_lines, 'sign'))
assert len(result) == 2
char, name = result[0]
assert char == '<'
assert name == 'LESS-THAN SIGN'
char, name = result[1]
assert char == '='
assert name == 'EQUALS SIGN'
def test_scan_old_name(line_with_old_name):
result = list(scan([line_with_old_name], 'period'))
assert len(result) == 1
char, name = result[0]
assert char == '.'
assert name == 'FULL STOP | PERIOD'
def test_scan_empty_query(three_lines):
result = list(scan(three_lines, ' '))
assert len(result) == 0
def test_scan_hyphenated_word(three_lines):
result = list(scan(three_lines, 'less-than'))
assert len(result) == 1
char, name = result[0]
assert char == '<'
assert name == 'LESS-THAN SIGN'
