test.feature

Given I have a string "hello world"
When I split it based on the " " character
Then I expect two tokens
And I expect these tokens to be present:
  | token |
  | hello |
  | world |

test.py

class TestStringMethods(unittest.TestCase):

    def test_split(self):
        # Precondition
        s = 'hello world'
        
        # Test Case
        tokens = s.split()
        
        # Assertion
        self.assertEqual(tokens, ['hello', 'world'])
        
        
        
from behave import *

@given(u'I have a string \'{s}\'')
def step_impl(context, s):
    context.s = s

@when(u'I split it based on the \'{separator}\' character')
def step_impl(context, separator):
    context.tokens = context.s.split(' ')

@then(u'I expect {num} tokens')
def step_impl(context, num):
    assert len(context.tokens) == int(num)

@then(u'I expect these tokens to be present')
def step_impl(context):
    for i, row in enumerate(context.table):
        assert context.tokens[i] == row['token']