int rowHeight = c1.getHeight();
assertEquals("Column width (container min)", 10, columnWidth);
assertEquals("Row height (container min)", 10, rowHeight);
panel.setSize(preferredLayoutSize);
panel.doLayout();
columnWidth = c1.getWidth();
rowHeight = c1.getHeight();
assertEquals("Column width (container pref)", 20, columnWidth);
assertEquals("Row height (container pref)", 20, rowHeight);
}