Tests the SystemConfigFormTestBase class.
function testSystemConfigForm() {
$this
->drupalGet('form-test/system-config-form');
$element = $this
->xpath('//div[@id = :id]/input[contains(@class, :class)]', array(
':id' => 'edit-actions',
':class' => 'button-primary',
));
$this
->assertTrue($element, 'The primary action submit button was found.');
$this
->drupalPost(NULL, array(), t('Save configuration'));
$this
->assertText(t('The configuration options have been saved.'));
}