public void column_resize_smaller() {
browser.get(contextPath.toExternalForm());
WebElement column1ResizeHandle = header.findElement(By.cssSelector(".rf-edt-hdr .rf-edt-td-column1 .rf-edt-rsz"));
Actions builder = new Actions(browser);
final Action dragAndDrop = builder.dragAndDropBy(column1ResizeHandle, -20, 0).build();
dragAndDrop.perform();
Assert.assertEquals("181px", firstRow.findElement(By.cssSelector("td")).getCssValue("width"));
Assert.assertEquals("180px", firstRow.findElement(By.cssSelector("td .rf-edt-c-column1")).getCssValue("width"));
}