我正在使用geb spock和groovy创建一个自动化脚本。在我的测试类中，我有多个测试，我想在运行任何测试之前导航到主页

1. 登录到应用程序并导航到主页（登录后的默认页面是主页）
2. 单击链接1。检查Page.navigate到主页
3. 单击链接2。检查页面。导航到主页
4. 单击链接3。检查页面。导航到主页

我创建了一个方法并尝试在我的geb测试中重用它，但出现以下错误：

geb.error.PageInstanceNotInitializedException: Instance of page class pages.Test_HomePage has not been initialized. Please pass it to Browser.to(), Browser.via(), Browser.page() or Browser.at() before using it.
at geb.Page.uninitializedException(Page.groovy:521)
        at geb.content.UninitializedPageContentSupport.getContent(UninitializedPageContentSupport.groovy:30)
        at geb.content.PageContentSupport.propertyMissing(PageContentSupport.groovy:39)
        at geb.Page.propertyMissing(Page.groovy:99)
        at pages.Test_HomePage.clickOnHomePage(Test_HomePage.groovy:46)
        at com.abc.vcctest.TestNavigationInitialTestSpec.Navigate to Home page of test portal(TestNavigationInitialTestSpec.groovy:44)

这是我的示例geb测试：

@TestMixin(GrailsUnitTestMixin)
    class TestNavigationInitialTestSpec extends LoginBaseTestSpec {
        @Shared
        Test_HomePage test_HomePage = new Test_HomePage()
        def cleanupSpec() {
            browser.close()
        }
        def setup() {
        }
        def cleanup() {
        }
        def navigateToHomePage() {
            Test_HomePage test_HomePage = at Test_HomePage
            test_HomePage.clickOnHomePage()
            at Test_HomePage
        }
        def "Navigate to Home page of test portal"() {
            given:
            HomePage homePage = at HomePage

            when: "Click on Home tab/link"
            navigateToHomePage()
            test_HomePage.clickOnHomePage()
            def crashDisplayed = test_HomePage.crashPageDisplayed()

            then: "You are on Home Page"
            !crashDisplayed || { at Test_HomePage } 
        }

            def "Navigate to Change Password page of testportal"() {
                given:
                at Test_HomePage

                when: "Click on Change Password"
                test_HomePage.clickOnChangePassword()
                Test_ChangePassword test_ChangePassword = at Test_ChangePassword
                def crashDisplayed1 = test_ChangePassword.crashPageDisplayed()

                then: "You are on Change Password Page"
                !crashDisplayed1 || { at Test_ChangePassword }
                at Test_ChangePassword
               
            } 

这是我的Test_HomePage类：

class Test_HomePage extends HomePage2{
      static url = '/home'
      static at = {
        waitFor(message:"The Test Portal title is missing."){driver.title == "Test Portal"}
      }
      static content = {
        pageCrash(required: false, cache: false) { $("h1") }
        homePageLink {
          $("a[href = '/Link1']")
        }
       changePasswordLink{
          $("a[href='/Link2']")
        }
        updateEmailLink{
          $ ("a[href = '/Link3']")
        }
      }
      void crashPageDisplayed() {
        if (pageCrash.isDisplayed()) {
          driver.navigate().back()
        }
      }
      void clickOnHomePage() {
        homePageLink.click()
      }
      void clickOnChangePassword(){
        changePasswordLink.click()
      }
      void clickUpdateEmail(){
        updateEmailLink.click()
      }
    }

我是geb和spock的新手，我可能会犯一个非常愚蠢的错误，但任何帮助或建议都将非常感谢，以有效的方式实现这一点。