How do I handle exceptions in async Java tests?

How do I handle exceptions in async Java tests?

You can handle exceptions in async Java tests by using the CompletableFuture class and its methods like handle() or exceptionally().

Can you give me an example of using CompletableFuture?

Sure! Here's a simple example:

CompletableFuture.supplyAsync(() -> {
    // some async operation
}).handle((result, ex) -> {
    if (ex != null) {
        // handle exception
        return "Error occurred: " + ex.getMessage();
    }
    return result;
});

What if I want to test multiple async methods?

You can use CompletableFuture.allOf() to wait for multiple futures to complete and handle exceptions accordingly.

Is there a way to assert exceptions in my tests?

Yes, you can use JUnit's assertThrows() method in combination with async calls to assert that exceptions are thrown.