def test_task_2_validate_login_more_then_20_length():
"""
task_2.validate_login should return False if length of the string is more then 20.
"""
input_data = 'The.Greatest.Julius.Caesar-3000'
expected_data = False
result = validate_login(input_data)
assert_equals(result, expected_data)
def test_task_2_validate_login_one_symbol_length():
"""
task_2.validate_login should return True if length of the string is 1.
"""
input_data = 'J'
expected_data = True
result = validate_login(input_data)
assert_equals(result, expected_data)
def test_task_2_validate_login_first_symbol_dot():
"""
task_2.validate_login should return False if first symbol of the string is dot.
"""
input_data = '.another.Julius'
expected_data = False
result = validate_login(input_data)
assert_equals(result, expected_data)
def test_task_2_validate_login_last_symbol_dash():
"""
task_2.validate_login should return False if last symbol of the string is dash.
"""
input_data = 'another.Julius-'
expected_data = False
result = validate_login(input_data)
assert_equals(result, expected_data)
def test_task_2_validate_login_valid_input():
"""
task_2.validate_login should return True for valid input string.
"""
input_data = 'Julius.Caesar-2000'
expected_data = True
result = validate_login(input_data)
assert_equals(result, expected_data)
