Fix flaky filemanage_e2e_test (#10068)

dolphinscheduler-e2e/dolphinscheduler-e2e-case/src/test/java/org/apache/dolphinscheduler/e2e/pages/resource/FileManagePage.java

@@ -28,12 +28,14 @@ import org.apache.dolphinscheduler.e2e.pages.common.NavBarPage;
 import org.openqa.selenium.By;
 import org.openqa.selenium.JavascriptExecutor;
 import org.openqa.selenium.Keys;
+import org.openqa.selenium.WebDriver;
 import org.openqa.selenium.WebElement;
 import org.openqa.selenium.remote.LocalFileDetector;
 import org.openqa.selenium.remote.RemoteWebDriver;
 import org.openqa.selenium.support.FindBy;
 import org.openqa.selenium.support.FindBys;
 import org.openqa.selenium.support.PageFactory;
+import org.openqa.selenium.support.ui.ExpectedCondition;
 import org.openqa.selenium.support.ui.ExpectedConditions;
 import org.openqa.selenium.support.ui.WebDriverWait;
 
@@ -71,6 +73,12 @@ public class FileManagePage extends NavBarPage implements ResourcePage.Tab {
     })
     private WebElement buttonConfirm;
 
+    @FindBys({
+            @FindBy(className = "monaco-editor"),
+            @FindBy(className = "view-line"),
+    })
+    private WebElement editor;
+
     public FileManagePage(RemoteWebDriver driver) {
         super(driver);
 
@@ -178,6 +186,8 @@ public class FileManagePage extends NavBarPage implements ResourcePage.Tab {
 
         new WebDriverWait(driver, 5).until(ExpectedConditions.urlContains("/edit"));
 
+        new WebDriverWait(driver, 5).until((ExpectedCondition<Object>) webDriver -> editor.getText().length() > 0);
+
         editFileBox().codeEditor().content(scripts);
         editFileBox().buttonSubmit().click();