sidePanel01.assertExpressionEquals("offsetWidth", 50);
sidePanel01.splitter().dragAndDrop(+300, 0);
sidePanel01.assertExpressionEquals("offsetWidth", 350);
sidePanel01.splitter().dragAndDrop(+125, 0);
sidePanel01.assertExpressionEquals("offsetWidth", 450);
sidePanel01.splitter().dragAndDrop(+125, 0);
sidePanel01.assertExpressionEquals("offsetWidth", 450);
sidePanel01.splitter().dragAndDrop(-5, 0);
sidePanel01.assertExpressionEquals("offsetWidth", 445);
sidePanel01.splitter().dragAndDrop(-1000, 0);
sidePanel01.assertExpressionEquals("offsetWidth", 7);