MCPInstall

behave-skill

Generates Behave BDD tests for Python with Gherkin feature files and step implementations. Use when user mentions "Behave", "Python BDD", "Python Gherkin". Triggers on: "Behave", "Python BDD", "behave test", "Python feature file".

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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/lambdatest/agent-skills --skill behave-skill
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads behave-skill automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Behave BDD Skill

Core Patterns

Feature File (features/login.feature)

Feature: User Login
  As a registered user
  I want to log into the application

  Background:
    Given I am on the login page

  Scenario: Successful login
    When I enter "user@test.com" as email
    And I enter "password123" as password
    And I click login
    Then I should see the dashboard
    And the welcome message should say "Welcome"

  Scenario: Invalid credentials
    When I enter "wrong@test.com" as email
    And I enter "wrong" as password
    And I click login
    Then I should see error "Invalid credentials"

  Scenario Outline: Login with various users
    When I enter "<email>" as email
    And I enter "<password>" as password
    And I click login
    Then I should see "<result>"

    Examples:
      | email          | password | result    |
      | admin@test.com | admin123 | Dashboard |
      | bad@test.com   | wrong    | Error     |

Step Definitions (features/steps/login_steps.py)

from behave import given, when, then
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

@given('I am on the login page')
def step_on_login(context):
    context.browser.get(context.base_url + '/login')

@when('I enter "{text}" as email')
def step_enter_email(context, text):
    el = context.browser.find_element(By.ID, 'email')
    el.clear()
    el.send_keys(text)

@when('I enter "{text}" as password')
def step_enter_password(context, text):
    el = context.browser.find_element(By.ID, 'password')
    el.clear()
    el.send_keys(text)

@when('I click login')
def step_click_login(context):
    context.browser.find_element(By.CSS_SELECTOR, 'button[type="submit"]').click()

@then('I should see the dashboard')
def step_see_dashboard(context):
    WebDriverWait(context.browser, 10).until(
        EC.url_contains('/dashboard')
    )
    assert '/dashboard' in context.browser.current_url

@then('I should see error "{msg}"')
def step_see_error(context, msg):
    error = WebDriverWait(context.browser, 5).until(
        EC.visibility_of_element_located((By.CSS_SELECTOR, '.error'))
    )
    assert msg in error.text

Environment Hooks (features/environment.py)

from selenium import webdriver

def before_all(context):
    context.base_url = 'http://localhost:3000'

def before_scenario(context, scenario):
    context.browser = webdriver.Chrome()
    context.browser.implicitly_wait(10)

def after_scenario(context, scenario):
    if scenario.status == 'failed':
        context.browser.save_screenshot(f'screenshots/{scenario.name}.png')
    context.browser.quit()

Tags

@smoke
Feature: Login
  @critical
  Scenario: ...
behave --tags=@smoke
behave --tags="@smoke and not @slow"

Setup: pip install behave selenium

Run: behave or behave features/login.feature

Cloud Execution on TestMu AI

Set environment variables: LT_USERNAME, LT_ACCESS_KEY

# environment.py
from selenium import webdriver
import os

def before_scenario(context, scenario):
    lt_options = {
        "user": os.environ["LT_USERNAME"],
        "accessKey": os.environ["LT_ACCESS_KEY"],
        "build": "Behave Build",
        "name": scenario.name,
        "platformName": "Windows 11",
        "video": True,
        "console": True,
        "network": True,
    }
    options = webdriver.ChromeOptions()
    options.set_capability("LT:Options", lt_options)
    context.driver = webdriver.Remote(
        command_executor=f"https://{os.environ['LT_USERNAME']}:{os.environ['LT_ACCESS_KEY']}@hub.lambdatest.com/wd/hub",
        options=options,
    )

Report: behave --format json -o report.json

Deep Patterns

See reference/playbook.md for production-grade patterns:

SectionWhat You Get
§1 Project Setupbehave.ini, project structure, dependencies
§2 Feature FilesGherkin with Scenario Outline, data tables, Background
§3 Step DefinitionsType registration, API steps, common steps with PyHamcrest
§4 Environment Hooksbefore_all/scenario/feature, screenshot on failure, DB isolation
§5 Page ObjectsBasePage with waits, LoginPage, reusable components
§6 Fixtures & Test DataDatabaseHelper, transaction rollback, JSON data loader
§7 LambdaTest IntegrationRemote browser creation, cloud capabilities
§8 CI/CD IntegrationGitHub Actions with Postgres, Selenium, Allure reports
§9 Debugging Table12 common problems with causes and fixes
§10 Best Practices14-item BDD testing checklist

FAQ

What does the behave-skill skill do?

Generates Behave BDD tests for Python with Gherkin feature files and step implementations. Use when user mentions "Behave", "Python BDD", "Python Gherkin". Triggers on: "Behave", "Python BDD", "behave test", "Python feature file".

How do I install behave-skill?

Run npx skills add https://github.com/lambdatest/agent-skills --skill behave-skill in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/behave-skill/ (personal) or .claude/skills/behave-skill/ (project).

Which AI agents can use behave-skill?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is behave-skill safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains behave-skill?

It is published by lambdatest in lambdatest/agent-skills. It has 214 recorded installs.

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