Unit test correction for moving any event in month calendar view(#12413)

Change-Id: I6e80c77f758a451ffb23c5487e7a25f3c0eed3c7

uitest/src/com/vaadin/tests/components/calendar/CalendarMonthViewDndEventTest.java

@@ -34,13 +34,20 @@ public class CalendarMonthViewDndEventTest extends DndActionsTest {
     public void dragAndDropEventToNextDay() {
         openTestURL();
 
-        WebElement event = getDriver().findElement(
-                By.className("v-calendar-event"));
+        WebElement calendar = findElement(By.className("v-calendar"));
+        int calendarRight = calendar.getLocation().getX()
+                + calendar.getSize().getWidth();
+
+        WebElement event = findElement(By.className("v-calendar-event"));
         int x = event.getLocation().getX();
         int width = event.getSize().getWidth();
 
-        WebElement cell = getDriver().findElement(
-                By.className("v-calendar-month-day"));
+        // does calendar have space on the right for one more event (i.e. day
+        // cell on the right).
+        boolean moveRight = event.getLocation().getX() + 2
+                * event.getSize().getWidth() <= calendarRight;
+
+        WebElement cell = getParentCell(event, "v-calendar-month-day");
 
         int cellY = cell.getLocation().getY();
         int cellHeight = cell.getSize().getHeight();
@@ -48,34 +55,65 @@ public class CalendarMonthViewDndEventTest extends DndActionsTest {
         long origStart = getTime("start");
         long origEnd = getTime("end");
 
-        dragAndDrop(event, event.getSize().getWidth() + 5, 0);
+        if (moveRight) {
+            dragAndDrop(event, event.getSize().getWidth() + 5, 0);
+        } else {
+            dragAndDrop(event, -width / 2, 0);
+        }
 
-        event = getDriver().findElement(By.className("v-calendar-event"));
+        event = findElement(By.className("v-calendar-event"));
         int newX = event.getLocation().getX();
         int newY = event.getLocation().getY();
 
         Assert.assertTrue(
-                "Moved event has wrong Y position (not the same row)",
-                newY >= cellY && newY < cellY + cellHeight);
-        Assert.assertTrue(
-                "Moved event has wrong X position (not after original event)",
-                newX >= x + width - 1);
+                "Moved event has wrong Y position (not the same row), new Y position="
+                        + newY + ", cell Y position=" + cellY
+                        + ", cell height=" + cellHeight, newY >= cellY
+                        && newY < cellY + cellHeight);
+        if (moveRight) {
+            Assert.assertTrue(
+                    "Moved event has wrong X position (not after original event)",
+                    newX >= x + width - 1);
+        } else {
+            width = event.getSize().getWidth();
+            Assert.assertTrue(
+                    "Moved event has wrong X position (not after original event)",
+                    x >= newX + width - 1);
+        }
 
         long start = getTime("start");
         long end = getTime("end");
 
         int day = 24 * 3600000;
-        Assert.assertEquals(
-                "Start date of moved event is not next day, same time",
-                origStart + day, start);
-        Assert.assertEquals(
-                "End date of moved event is not next day, same time", origEnd
-                        + day, end);
+        if (moveRight) {
+            Assert.assertEquals(
+                    "Start date of moved event is not next day, same time",
+                    origStart + day, start);
+            Assert.assertEquals(
+                    "End date of moved event is not next day, same time",
+                    origEnd + day, end);
+        } else {
+            Assert.assertEquals(
+                    "Start date of moved event is not previous day, same time",
+                    origStart - day, start);
+            Assert.assertEquals(
+                    "End date of moved event is not previous day, same time",
+                    origEnd - day, end);
+
+        }
+    }
+
+    private WebElement getParentCell(WebElement element, String style) {
+        WebElement parent = element;
+        do {
+            // ".." xpath expression chooses the parent of the element
+            parent = parent.findElement(By.xpath(".."));
+        } while (!parent.getAttribute("class").contains(style));
+        return parent;
     }
 
     private long getTime(String style) {
-        WebElement start = getDriver().findElement(By.className(style));
+        WebElement start = findElement(By.className(style));
         return Long.parseLong(start.getText());
     }
-
 }