Add a simple waitForApplication for servlet integration tests

This waitForApplication checks if an UI element exists on the page. If
not, then it will wait 10 seconds in order for it to appear. This should
reduce the amount of false negatives in server tests.

Change-Id: I9409f5a9ebcaa5511e7a250f49070f38cad2ff5e

1 files changed, 15 insertions, 0 deletions

diff --git a/uitest/src/com/vaadin/tests/integration/AbstractIntegrationTest.java b/uitest/src/com/vaadin/tests/integration/AbstractIntegrationTest.java
index 5dd59a8245..f035ef35f6 100644
--- a/uitest/src/com/vaadin/tests/integration/AbstractIntegrationTest.java
+++ b/uitest/src/com/vaadin/tests/integration/AbstractIntegrationTest.java
@@ -15,6 +15,8 @@
  */
 package com.vaadin.tests.integration;
 
+import com.vaadin.testbench.By;
+import com.vaadin.testbench.elements.UIElement;
 import com.vaadin.testbench.parallel.TestNameSuffix;
 import com.vaadin.tests.tb3.PrivateTB3Configuration;
 
@@ -37,4 +39,17 @@ public abstract class AbstractIntegrationTest extends PrivateTB3Configuration {
         return deploymentUrl;
     }
 
+    @Override
+    protected void openTestURL() {
+        super.openTestURL();
+
+        waitForApplication();
+    }
+
+    protected void waitForApplication() {
+        if (!isElementPresent(UIElement.class)) {
+            // Wait for UI element.
+            waitForElementPresent(By.vaadin("//com.vaadin.ui.UI"));
+        }
+    }
 }