Question

I have a Java EE web application that heavily relies on dependency injection.

Currently it works as expected and it is injecting everything the way I want it to in production and I can without too much hassle inject mock objects when I am writing unit tests.

However I now want to create integration tests so that I know that the entire flow is working and it is getting and parsing correct data from other APIs.

The problem I am seeing now is with solving dependency injection in a test environment, because it is an integration test there are a lot more dependencies to solve, So doing this manually does not seem feasible.

So, How is this usually solved? for reference I am using a mix of @EJB and @Inject to inject Objects.

Answer 1

我将使用的一个肮脏的黑客解决方法，直到我弄清楚它应该如何完成：

    private static Map<Class, Object> instances = new HashMap<>();
    public static <T> T getInstance(Class<T> type) throws IllegalAccessException, InstantiationException {
        if(instances.containsKey(type))
            return (T)instances.get(type);
        T res = type.newInstance();
        instances.put(type, res);
        for(Field field : type.getDeclaredFields()) {
            if (field.isAnnotationPresent(Inject.class) || field.isAnnotationPresent(EJB.class)) {
                field.setAccessible(true);
                field.set(res, getInstance(field.getType()));
            }
        }
        return res;
    }

Creating integration tests on classes with dependency injection

1 个答案: