sidePanel01.splitter().dragAndDrop(+300, 0);
borderLayoutPanel00.content().assertExpressionEquals("offsetWidth", 100);
sidePanel01.splitter().dragAndDrop(+125, 0);
borderLayoutPanel00.content().assertExpressionEquals("offsetWidth", 0);
sidePanel01.splitter().dragAndDrop(+125, 0);
borderLayoutPanel00.content().assertExpressionEquals("offsetWidth", 0);
sidePanel01.splitter().dragAndDrop(-5, 0);
borderLayoutPanel00.content().assertExpressionEquals("offsetWidth", 5);
sidePanel01.splitter().dragAndDrop(-1000, 0);
borderLayoutPanel00.content().assertExpressionEquals("offsetWidth", 443);
sidePanel01.splitter().dragAndDrop(+43, 0);