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Geb Skill

> Generates Geb browser automation tests in Groovy with Spock integration. jQuery-like content DSL and page object pattern. Use when user mentions "Geb", "Groovy browser test", "Browser.drive".

1k tokens
context cost
SKILL.md, read when the skill is used
4
files
plus reference files
0
copies elsewhere
how many repositories repackaged it
343
stars on the repo
on the repository, not the skill itself

Install

one command, takes just this skill from the repository
npx skills add https://github.com/LambdaTest/agent-skills --skill geb-skill

The instruction itself

10 sections, as written by the author

Geb Automation Skill

For TestMu AI cloud execution, see reference/cloud-integration.md and shared/testmu-cloud-reference.md.

Core Patterns

Basic Test (Spock)

import geb.spock.GebSpec

class LoginSpec extends GebSpec {
    def "login with valid credentials"() {
        when:
        to LoginPage
        emailInput.value("[email protected]")
        passwordInput.value("password123")
        loginButton.click()

        then:
        at DashboardPage
        welcomeMessage.text().contains("Welcome")
    }

    def "login shows error for invalid credentials"() {
        when:
        to LoginPage
        emailInput.value("[email protected]")
        passwordInput.value("wrong")
        loginButton.click()

        then:
        at LoginPage
        errorMessage.displayed
        errorMessage.text().contains("Invalid")
    }
}

Page Objects

class LoginPage extends geb.Page {
    static url = "/login"
    static at = { title == "Login" }
    static content = {
        emailInput { $("#email") }
        passwordInput { $("#password") }
        loginButton { $("button[type='submit']") }
        errorMessage(required: false) { $(".error") }
    }
}

class DashboardPage extends geb.Page {
    static url = "/dashboard"
    static at = { $(".dashboard").displayed }
    static content = {
        welcomeMessage { $(".welcome") }
        userName { $(".user-name") }
    }
}
$("css-selector")
$("div", class: "active")
$("input", name: "email")
$("div.items li", 0)        // First match
$("div.items li").size()     // Count

// Actions
element.click()
element.value("text")
element << "text"            // Append text
element.text()
element.displayed
element.@href                // Attribute

Cloud: driver = new RemoteWebDriver(new URL(gridUrl), caps)

Setup: Gradle with geb-spock and selenium-support dependencies

Cloud Execution on TestMu AI

Set environment variables: LT_USERNAME, LT_ACCESS_KEY

// GebConfig.groovy
environments {
    lambdatest {
        driver = {
            def ltOptions = [
                user: System.getenv("LT_USERNAME"),
                accessKey: System.getenv("LT_ACCESS_KEY"),
                build: "Geb Build",
                name: "Geb Test",
                platformName: "Windows 11",
                video: true,
                console: true,
                network: true,
            ]
            def caps = new ChromeOptions()
            caps.setCapability("LT:Options", ltOptions)
            new RemoteWebDriver(
                new URL("https://hub.lambdatest.com/wd/hub"), caps)
        }
    }
}

Run: ./gradlew test -Dgeb.env=lambdatest

Run: ./gradlew test

Deep Patterns

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

| Section | What You Get |

|---------|-------------|

| §1 Project Setup | build.gradle, GebConfig.groovy, environments, waiting config |

| §2 Page Objects | Content DSL, at checks, modules for reusable components |

| §3 Spec Tests | Spock integration, data-driven with @Unroll, @Stepwise flows |

| §4 Waiting & Async | Waiting presets, JavaScript interaction, alerts/confirms |

| §5 Advanced Patterns | File upload/download, windows, frames, custom extensions |

| §6 API Testing | REST API specs with Groovy JsonSlurper |

| §7 CI/CD Integration | GitHub Actions with headless Chrome, Gradle caching |

| §8 Debugging Table | 12 common problems with causes and fixes |

| §9 Best Practices | 14-item Geb testing checklist |

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How to use it

Copy the folder

Take lambdatest/geb-skill from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.