---
name: behave-skill-8eca3450c4c8
description: >
  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".
languages:
  - Python
category: bdd-testing
license: MIT
metadata:
  author: TestMu AI
  version: "1.0"
---

# Behave BDD Skill

## Core Patterns

### Feature File (features/login.feature)

```gherkin
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)

```python
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)

```python
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

```gherkin
@smoke
Feature: Login
  @critical
  Scenario: ...
```

```bash
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`

```python
# 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:

| Section | What You Get |
|---------|-------------|
| §1 Project Setup | behave.ini, project structure, dependencies |
| §2 Feature Files | Gherkin with Scenario Outline, data tables, Background |
| §3 Step Definitions | Type registration, API steps, common steps with PyHamcrest |
| §4 Environment Hooks | before_all/scenario/feature, screenshot on failure, DB isolation |
| §5 Page Objects | BasePage with waits, LoginPage, reusable components |
| §6 Fixtures & Test Data | DatabaseHelper, transaction rollback, JSON data loader |
| §7 LambdaTest Integration | Remote browser creation, cloud capabilities |
| §8 CI/CD Integration | GitHub Actions with Postgres, Selenium, Allure reports |
| §9 Debugging Table | 12 common problems with causes and fixes |
| §10 Best Practices | 14-item BDD testing checklist |


---
Source attribution: LambdaTest
Original project: https://github.com/LambdaTest/agent-skills
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 Gabriel Moreira

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: LambdaTest
Original project: https://github.com/LambdaTest/agent-skills
Attribution basis: Upstream repository explicitly recorded in package mirror path

Fields of work: Development & Engineering
Roles: Backend Developer, DevOps / SRE, QA / Test Engineer
Specialties: Backend, Testing
Tools: Selenium
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 9eff9b029caec4ca55c2651344a457757dfd1ca7604612147de3ecde958ae6a2