Test that dependencies between modules are resolved correctly.
function testUpdateOrderingModuleInterdependency() {
$starting_updates = array(
'update_test_2' => 8000,
'update_test_3' => 8000,
);
$update_order = array_keys(update_resolve_dependencies($starting_updates));
// Make sure that each dependency is satisfied.
$first_dependency_satisfied = array_search('update_test_2_update_8000', $update_order) < array_search('update_test_3_update_8000', $update_order);
$this
->assertTrue($first_dependency_satisfied, 'The dependency of the second module on the first module is respected by the update function order.');
$second_dependency_satisfied = array_search('update_test_3_update_8000', $update_order) < array_search('update_test_2_update_8001', $update_order);
$this
->assertTrue($second_dependency_satisfied, 'The dependency of the first module on the second module is respected by the update function order.');
}