When ComboBox popup opens to the left accommodate margin/border/padding. (#11755)

Fixes #11718

1 files changed, 27 insertions, 0 deletions

diff --git a/uitest/src/test/java/com/vaadin/tests/components/combobox/ComboBoxAtRightEdgeTest.java b/uitest/src/test/java/com/vaadin/tests/components/combobox/ComboBoxAtRightEdgeTest.java
new file mode 100644
index 0000000000..e65d4ed12b
--- /dev/null
+++ b/uitest/src/test/java/com/vaadin/tests/components/combobox/ComboBoxAtRightEdgeTest.java
@@ -0,0 +1,27 @@
+package com.vaadin.tests.components.combobox;
+
+import org.junit.Test;
+import org.openqa.selenium.WebElement;
+
+import com.vaadin.testbench.elements.ComboBoxElement;
+import com.vaadin.tests.tb3.MultiBrowserTest;
+
+public class ComboBoxAtRightEdgeTest extends MultiBrowserTest {
+
+    @Test
+    public void ensurePopupInView() {
+        openTestURL();
+
+        ComboBoxElement cb = $(ComboBoxElement.class).first();
+        cb.openPopup();
+        WebElement popup = cb.getSuggestionPopup();
+
+        int cbRight = cb.getLocation().getX() + cb.getSize().getWidth();
+        int popupRight = popup.getLocation().getX()
+                + popup.getSize().getWidth();
+        assertGreaterOrEqual(String.format(
+                "Popup should not reach further right than the ComboBox at the "
+                        + "right edge of the viewport. ComboBox: %s, Popup: %s",
+                cbRight, popupRight), cbRight, popupRight);
+    }
+}