ContainerSizeChangeTest.java

package com.vaadin.tests.components.table;

import static junit.framework.TestCase.fail;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;

import java.io.IOException;

import org.junit.Test;
import org.openqa.selenium.NoSuchElementException;

import com.vaadin.testbench.By;
import com.vaadin.testbench.elements.TableElement;
import com.vaadin.testbench.elements.ButtonElement;
import com.vaadin.tests.tb3.MultiBrowserTest;

public class ContainerSizeChangeTest extends MultiBrowserTest {

    @Test
    public void tableShouldLoadCorrectItems()
            throws IOException, InterruptedException {
        openTestURL();

        ButtonElement decreaseSize = $(ButtonElement.class)
                .caption("Decrease size").first();
        decreaseSize.click(); // decreasing container size from 50 to 40
        decreaseSize.click(); // decreasing container size from 40 to 30

        TableElement table = $(TableElement.class).first();
        // TableElement scroll not working properly, so we need to do this.
        // http://dev.vaadin.com/ticket/13826
        testBenchElement(table.findElement(By.className("v-scrollable")))
                .scroll(1000);

        // waitforvaadin not worky currently for table scroll, so we need to use
        // thread sleep :(
        Thread.sleep(1500);

        assertThatRowExists(table, 29);
        assertRowDoesNotExist(table, 30);
    }

    private void assertThatRowExists(TableElement table, int rowIndex) {
        assertThat(table.getCell(rowIndex, 0).getText(),
                is(String.format("a %s", rowIndex)));
    }

    private void assertRowDoesNotExist(TableElement table, int rowIndex) {
        try {
            table.getCell(rowIndex, 0);

            fail(String.format("Row %s should not exists.", rowIndex));
        } catch (NoSuchElementException e) {

        }
    }
}