Makes sure that the default variable parameter is passed through okay.
function testVariableDefaults() {
// Tests passing nothing through to the default.
$this
->assertIdentical(NULL, variable_get('simpletest_bootstrap_variable_test'), 'Variables are correctly defaulting to NULL.');
// Tests passing 5 to the default parameter.
$this
->assertIdentical(5, variable_get('simpletest_bootstrap_variable_test', 5), 'The default variable parameter is passed through correctly.');
}