Test creating an image style with a numeric name and ensuring it can be applied to an image.
function testNumericStyleName() {
$style_name = rand();
$style_label = $this
->randomString();
$edit = array(
'name' => $style_name,
'label' => $style_label,
);
$this
->drupalPost('admin/config/media/image-styles/add', $edit, t('Create new style'));
$this
->assertRaw(t('Style %name was created.', array(
'%name' => $style_label,
)));
$options = image_style_options();
$this
->assertTrue(array_key_exists($style_name, $options), format_string('Array key %key exists.', array(
'%key' => $style_name,
)));
}