package com.vaadin.tests.server.component.gridlayout;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.fail;
import java.util.Iterator;
import java.util.NoSuchElementException;
import org.junit.Test;
import com.vaadin.ui.Component;
import com.vaadin.ui.GridLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.Layout;
public class GridLayoutTest {
Component[] children = new Component[] { new Label("A"), new Label("B"),
new Label("C"), new Label("D") };
@Test
public void testConstructorWithComponents() {
GridLayout grid = new GridLayout(2, 2, children);
assertContentPositions(grid);
assertOrder(grid, new int[] { 0, 1, 2, 3 });
grid = new GridLayout(1, 1, children);
assertContentPositions(grid);
assertOrder(grid, new int[] { 0, 1, 2, 3 });
}
@Test
public void testAddComponents() {
GridLayout grid = new GridLayout(2, 2);
grid.addComponents(children);
assertContentPositions(grid);
assertOrder(grid, new int[] { 0, 1, 2, 3 });
Label extra = new Label("Extra");
Label extra2 = new Label("Extra2");
grid.addComponents(extra, extra2);
assertSame(grid.getComponent(0, 2), extra);
assertSame(grid.getComponent(1, 2), extra2);
grid.removeAllComponents();
grid.addComponents(extra, extra2);
assertSame(grid.getComponent(0, 0), extra);
assertSame(grid.getComponent(1, 0), extra2);
grid.addComponents(children);
assertOrder(grid, new int[] { -1, -1, 0, 1, 2, 3 });
grid.removeComponent(extra);
grid.removeComponent(extra2);
assertOrder(grid, new int[] { 0, 1, 2, 3 });
grid.addComponents(extra2, extra);
assertSame(grid.getComponent(0, 3), extra2);
assertSame(grid.getComponent(1, 3), extra);
assertOrder(grid, new int[] { 0, 1, 2, 3, -1, -1 });
grid.removeComponent(extra2);
grid.removeComponent(extra);
grid.setCursorX(0);
grid.setCursorY(0);
grid.addComponents(extra, extra2);
assertSame(grid.getComponent(0, 0), extra);
assertSame(grid.getComponent(1, 0), extra2);
assertOrder(grid, new int[] { -1, -1, 0, 1, 2, 3 });
grid = new GridLayout();
grid.addComponents(children);
assertContentPositions(grid);
assertOrder(grid, new int[] { 0, 1, 2, 3 });
}
private void assertContentPositions(GridLayout grid) {
assertEquals(grid.getComponentCount(), children.length);
int c = 0;
for (int i = 0; i < grid.getRows(); i++) {
for (int j = 0; j < grid.getColumns(); j++) {
assertSame(grid.getComponent(j, i), children[c]);
c++;
}
}
}
/**
* Asserts that layout has the components in children in the order specified
* by indices.
*/
private void assertOrder(Layout layout, int[] indices) {
Iterator<?> i = layout.iterator();
try {
for (int index : indices) {
if (index != -1) {
assertSame(children[index], i.next());
} else {
i.next();
}
}
assertFalse("Too many components in layout", i.hasNext());
} catch (NoSuchElementException e) {
fail("Too few components in layout");
}
}
}