Implementing parallel execution of autotests using JUnit 5 + GEB (without spock)

Question

I'm trying to implement parallel execution of autotests using JUnit 5 and GEB. At the moment, the tests are already running in parallel. The problem is that every page element must be visible at the time the page object is created. If the object was not displayed on the page, then when you try to access it, a new browser object is created with a new page, starting an extra thread. How can this be avoided?

package tests

import geb.Browserimport geb.Pageimport geb.junit5.GebReportingTest

import org.junit.jupiter.api.AfterEachimport org.junit.jupiter.api.BeforeEachimport org.junit.jupiter.api.Testimport org.junit.jupiter.api.extension.ExtendWithimport io.github.bonigarcia.seljup.SeleniumJupiterimport org.openqa.selenium.chrome.ChromeDriver;import pages.CbsLoginPageimport static org.assertj.core.api.Assertions.*

@ExtendWith(SeleniumJupiter.class)class LoginToCbsTest extends GebReportingTest {public Browser browserpublic CbsLoginPage page

@BeforeEach
public void classLevelSetup() {
    browser = new Browser()
    browser.setDriver(new ChromeDriver())
    page = browser.createPage(CbsLoginPage.class)
}

@AfterEach
public void teardown() {
    browser.quit()
}

@Test
void loginFailsWhenPasswordIsWrong() {
    // When
    page.fillCredentialsForm("username", "123_Wrong_password")
    page.clickLoginButton()

    // Then
    verifyLoginErrorIsDisplayed()
}

@Test
void loginFailsWhenUsernameIsWrong() {
    // When
    page.fillCredentialsForm("Wrong_username", "password")
    page.clickLoginButton()

    // Then
    verifyLoginErrorIsDisplayed()
}

---

package pages

import geb.Pageimport modules.CbsLoginPageModule

import static geb.Browser.drive

class CbsLoginPage extends Page {static at = { title == "Log in to Application" }

static content = {
    loginForm { module(CbsLoginPageModule) }
}

void fillCredentialsForm(String username, String password) {
    drive(getBrowser(), {
        getBrowser().to(this)
        loginForm.loginField.value(username)
        loginForm.passwordField.value(password)
    })
}

void clickLoginButton() {
    drive(getBrowser(), {
        getBrowser().at(this)
        loginForm.loginButton.click()
    })
}

void getErrorMessage() {
    drive(getBrowser(), {
        getBrowser().at(this)
        page
        waitFor { $("div", innerHTML: contains("Invalid username or password.")) //This element is not visible when page was created}
    })
}

}

---

package modules

import geb.Module

class CbsLoginPageModule extends Module {
    static content = {form { $("form") }
        loginField { form.$(id: "name") }
        passwordField { form.$(id: "password") }
        loginButton { form.$(name: "login") }
}

}

---

/*This is the Geb configuration file.

See: http://www.gebish.org/manual/current/#configuration

*/

import org.openqa.selenium.chrome.ChromeDriver

waiting {timeout = 2}

environments {

driver = { new ChromeDriver() }

}reportsDir = new File("target/runtime_reports_dir")baseUrl = "url"

---

plugins {id "idea"id "groovy"}

repositories {mavenCentral()}

dependencies {testImplementation 'io.github.bonigarcia:selenium-jupiter:4.0.1'testImplementation 'org.seleniumhq.selenium:selenium-java:4.1.2'testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.8.1'testImplementation 'org.gebish:geb-junit5:5.1'testImplementation 'org.assertj:assertj-core:3.22.0'}

task chromedriverTest(type: Test) {useJUnitPlatform()}

task chromeheadlessTest(type: Test) {useJUnitPlatform()}

test {useJUnitPlatform()testLogging {events "passed", "skipped", "failed"}

systemProperty("junit.jupiter.execution.parallel.enabled" , "true")
systemProperty("junit.jupiter.execution.parallel.config.strategy", "fixed")
systemProperty("junit.jupiter.execution.parallel.mode.default", "concurrent")
systemProperty("junit.jupiter.execution.parallel.config.fixed.parallelism", 2)

}