Test tweaks (#11851)

* Test tweaks

Less fixed waiting times when there are ways to check that the operation
has been performed. This will hopefully improve the stability a bit.

* Merge branch 'master' into updateTests20191218

uitest/src/test/java/com/vaadin/tests/components/grid/GridEditorFrozenColumnsUITest.java

@@ -22,7 +22,7 @@ public class GridEditorFrozenColumnsUITest extends MultiBrowserTest {
         openTestURL();
 
         openEditor(10);
-        sleep(500);
+        waitForElementPresent(By.className("v-grid-editor"));
         compareScreen("noscroll");
 
         scrollGridHorizontallyTo(100);

uitest/src/test/java/com/vaadin/tests/components/upload/InterruptUploadTest.java

@@ -7,19 +7,19 @@ import java.io.IOException;
 
 import org.junit.Test;
 import org.openqa.selenium.By;
-import org.openqa.selenium.JavascriptExecutor;
+import org.openqa.selenium.WebDriver;
 import org.openqa.selenium.WebElement;
 import org.openqa.selenium.internal.WrapsElement;
 import org.openqa.selenium.remote.LocalFileDetector;
 import org.openqa.selenium.remote.RemoteWebElement;
+import org.openqa.selenium.support.ui.ExpectedCondition;
 
+import com.vaadin.testbench.elements.ButtonElement;
 import com.vaadin.testbench.elements.LabelElement;
 import com.vaadin.testbench.elements.WindowElement;
 import com.vaadin.tests.tb3.MultiBrowserTest;
 import com.vaadin.tests.util.LoremIpsum;
 
-import static org.junit.Assert.assertTrue;
-
 public class InterruptUploadTest extends MultiBrowserTest {
 
     private static final String EXPECTED_COUNTER_TEXT = " (counting interrupted at ";
@@ -29,36 +29,42 @@ public class InterruptUploadTest extends MultiBrowserTest {
         openTestURL();
 
         File tempFile = createTempFile();
-        scheduleUploadCancel();
-
         fillPathToUploadInput(tempFile.getPath());
 
-        // Wait for 3 seconds until everything is done.
-        Thread.sleep(3000);
-
-        String actual = $(LabelElement.class).caption("Line breaks counted")
-                .first().getText();
-        assertTrue("Line break count note does not match expected (was: "
-                + actual + ")", actual.contains(EXPECTED_COUNTER_TEXT));
+        waitForElementPresent(By.className("v-window"));
+        $(ButtonElement.class).caption("Cancel").first().click();
+        waitUntilInterruptionRegistered();
 
         $(WindowElement.class).first().close();
         waitForElementNotPresent(By.className("v-window"));
 
         // Check if second upload happens
         tempFile = createTempFile();
-        scheduleUploadCancel();
         fillPathToUploadInput(tempFile.getPath());
 
-        actual = $(LabelElement.class).caption("Line breaks counted").first()
-                .getText();
-        assertTrue("Line break count note does not match expected (was: "
-                + actual + ")", actual.contains(EXPECTED_COUNTER_TEXT));
+        waitForElementPresent(By.className("v-window"));
+        $(ButtonElement.class).caption("Cancel").first().click();
+        waitUntilInterruptionRegistered();
     }
 
-    private void scheduleUploadCancel() {
-        // Schedule upload cancel in 2 seconds
-        ((JavascriptExecutor) getDriver()).executeScript(
-                "setTimeout( function () {window.document.querySelector(\".v-window .v-button\").click()},2000)");
+    private void waitUntilInterruptionRegistered() {
+        waitUntil(new ExpectedCondition<Boolean>() {
+            String actual;
+
+            @Override
+            public Boolean apply(WebDriver arg0) {
+                actual = $(LabelElement.class).caption("Line breaks counted")
+                        .first().getText();
+                return actual.contains(EXPECTED_COUNTER_TEXT);
+            }
+
+            @Override
+            public String toString() {
+                // Expected condition failed: waiting for ...
+                return "line break count note to mention interruption (was: "
+                        + actual + ")";
+            }
+        });
     }
 
     /**