public function testRenderWithPlaceholder()
{
$textarea = new TextArea('bio');
$expected = '<textarea name="bio" rows="10" cols="50" placeholder="Your bio"></textarea>';
$result = $textarea->placeholder('Your bio')->render();
$this->assertEquals($expected, $result);
$textarea = new TextArea('description');
$expected = '<textarea name="description" rows="10" cols="50" placeholder="Product description"></textarea>';
$result = $textarea->placeholder('Product description')->render();
$this->assertEquals($expected, $result);
}